SCIP 10

.github/workflows/coverage.yml

@@ -1,6 +1,6 @@
 name: Run tests with coverage
 env:
-  version: 9.2.4
+  version: 10.0.0
 
 on:
   push:
@@ -25,8 +25,8 @@ jobs:
 
       - name: Install dependencies (SCIPOptSuite)
         run: |
-          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-Linux-ubuntu22.deb
-          sudo apt-get update && sudo apt install -y ./SCIPOptSuite-${{ env.version }}-Linux-ubuntu22.deb
+          wget --quiet --no-check-certificate "https://github.com/scipopt/scip/releases/download/v${{ env.version }}/scipoptsuite_${{ env.version }}-1+jammy_amd64.deb"
+          sudo apt-get update && sudo apt install -y ./scipoptsuite_${{ env.version }}-1+jammy_amd64.deb
 
       - name: Setup python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -40,7 +40,7 @@ jobs:
 
       - name: Install PySCIPOpt
         run: |
-          export CFLAGS="-O0 -ggdb -Wall -Wextra -Werror" # Debug mode. More warnings. Warnings as errors.
+          export CFLAGS="-O0 -ggdb -Wall -Wextra -Werror -Wno-error=deprecated-declarations" # Debug mode. More warnings. Warnings as errors, but allow deprecated declarations.
           python -m pip install . -v 2>&1 | tee build.log
           grep -i "warning" build.log || true
 

.github/workflows/integration-test.yml

@@ -1,7 +1,7 @@
 name: Integration test
 
 env:
-  version: 9.2.4
+  version: 10.0.0
 
 on:
   push:
@@ -23,8 +23,8 @@ jobs:
 
       - name: Install dependencies (SCIPOptSuite)
         run: |
-          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-Linux-ubuntu22.deb
-          sudo apt-get update && sudo apt install -y ./SCIPOptSuite-${{ env.version }}-Linux-ubuntu22.deb
+          wget --quiet --no-check-certificate "https://github.com/scipopt/scip/releases/download/v${version}/scipoptsuite_${version}-1+jammy_amd64.deb"
+          sudo apt-get update && sudo apt install -y ./scipoptsuite_${version}-1+jammy_amd64.deb
 
       - name: Setup python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -54,7 +54,7 @@ jobs:
 
       - name: Download dependencies (SCIPOptSuite)
         shell: powershell
-        run: wget https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-win64.exe -outfile scipopt-installer.exe
+        run: wget https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/scipoptsuite-${{ env.version }}-win-x64.exe -outfile scipopt-installer.exe
 
       - name: Install dependencies (SCIPOptSuite)
         shell: cmd
@@ -92,10 +92,11 @@ jobs:
       - name: Install dependencies (SCIPOptSuite)
         run: |
           brew install tbb boost bison
-          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-Darwin.sh
-          chmod +x SCIPOptSuite-${{ env.version }}-Darwin.sh
-          ./SCIPOptSuite-${{ env.version }}-Darwin.sh --skip-license --include-subdir
-          mv SCIPOptSuite-${{ env.version }}-Darwin ${{ github.workspace }}/scipoptsuite
+          wget --quiet --no-check-certificate "https://github.com/scipopt/scip/releases/download/v${version}/scipoptsuite-${version}-macos13-arm64.tgz"
+          tar xzf "scipoptsuite-${version}-macos13-arm64.tgz"
+          chmod +x "scipoptsuite-${version}-macos13-arm64.sh"
+          "./scipoptsuite-${version}-macos13-arm64.sh" --skip-license --include-subdir
+          mv "scipoptsuite-${version}-macos13-arm64" "${{ github.workspace }}/scipoptsuite"
 
       - name: Setup python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -122,4 +123,3 @@ jobs:
   ### if you need valgrind on mac, you can install it via
   # brew tap LouisBrunner/valgrind
   # brew install --HEAD LouisBrunner/valgrind/valgrind
-

.github/workflows/test-release.yml

@@ -1,7 +1,7 @@
 name: TestPyPI release
 
 env:
-  version: 9.2.4
+  version: 10.0.0
 
 
 # runs only when a release is published, not on drafts
@@ -17,8 +17,8 @@ jobs:
 
       - name: Install dependencies (SCIPOptSuite)
         run: |
-          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-Linux-ubuntu20.deb
-          sudo apt-get update && sudo apt install -y ./SCIPOptSuite-${{ env.version }}-Linux-ubuntu20.deb
+          wget --quiet --no-check-certificate "https://github.com/scipopt/scip/releases/download/v${version}/scipoptsuite_${version}-1+jammy_amd64.deb"
+          sudo apt-get update && sudo apt install -y ./scipoptsuite_${version}-1+jammy_amd64.deb
 
       - name: Setup python 3
         uses: actions/setup-python@v4

.github/workflows/update-packages-and-documentation.yml

@@ -1,7 +1,7 @@
 name: Test and Release PyPI Package
 
 env:
-  version: 9.2.4
+  version: 10.0.0
 
 
 # runs only when a release is published, not on drafts
@@ -38,8 +38,8 @@ jobs:
 
       - name: Install dependencies (SCIPOptSuite)
         run: |
-          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-Linux-ubuntu20.deb
-          sudo apt-get update && sudo apt install -y ./SCIPOptSuite-${{ env.version }}-Linux-ubuntu20.deb
+          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/scipoptsuite_${{ env.version }}-1+jammy_amd64.deb
+          sudo apt-get update && sudo apt install -y ./scipoptsuite_${{ env.version }}-1+jammy_amd64.deb
 
       - name: Setup python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -71,7 +71,9 @@ jobs:
 
       - name: Download dependencies (SCIPOptSuite)
         shell: powershell
-        run: wget https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-win64-VS15.exe -outfile scipopt-installer.exe
+        run: |
+          $url = "https://github.com/scipopt/scip/releases/download/v${{ env.version }}/scipoptsuite-${{ env.version }}-win-x64.exe"
+          Invoke-WebRequest -Uri $url -OutFile scipopt-installer.exe
 
       - name: Install dependencies (SCIPOptSuite)
         shell: cmd
@@ -107,8 +109,8 @@ jobs:
 
       - name: Install dependencies (SCIPOptSuite)
         run: |
-          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/SCIPOptSuite-${{ env.version }}-Linux-ubuntu20.deb
-          sudo apt-get update && sudo apt install -y ./SCIPOptSuite-${{ env.version }}-Linux-ubuntu20.deb
+          wget --quiet --no-check-certificate https://github.com/scipopt/scip/releases/download/$(echo "v${{env.version}}" | tr -d '.')/scipoptsuite_${{ env.version }}-1+jammy_amd64.deb
+          sudo apt-get update && sudo apt install -y ./scipoptsuite_${{ env.version }}-1+jammy_amd64.deb
 
       - name: Setup python 3
         uses: actions/setup-python@v4

CHANGELOG.md

@@ -6,6 +6,20 @@
 ### Changed
 ### Removed
 
+## 6.0.0 - 2025.xx.yy
+### Added
+- Support for SCIP 10.0.0
+- Added support for IIS - Irreducible Inconsistent Subsystems
+- Added 4 new events: TYPECHANGED, IMPLTYPECHANGED, DUALBOUNDIMPROVED, GAPUPDATED.
+- Support for new implied integrality
+- Wrapped varIsBinary(), varIsIntegral(), varIsImpliedIntegral(), varIsNonImpliedIntegral(), varGetImplType()
+- Interfaced some exact SCIP methods
+- wrapped SCIPprintStatisticsJson
+### Fixed
+### Changed
+### Removed
+- Removed methods chgAndConsCheckFlagWhenUpgr, chgAndConsRemovableFlagWhenUpgr
+
 ## 5.7.0 - 2025.11.17
 ### Added
 - Added possibility of having variables in exponent.

docs/build.rst

@@ -21,6 +21,8 @@ To download SCIP please either use the pre-built SCIP Optimization Suite availab
 
     * - SCIP
       - PySCIPOpt
+    * - 10.0.0
+      - 6.0
     * - 9.2
       - 5.3, 5.4, 5.5, 5.6, 5.7 
     * - 9.1

pyproject.toml

@@ -51,9 +51,9 @@ AARCH=$(uname -m)
 echo "------"
 echo $AARCH
 if [[ $AARCH == "aarch64" ]]; then
-    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.9.0/libscip-linux-arm.zip -O scip.zip
+    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.10.0/libscip-linux-arm.zip -O scip.zip
 else
-    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.9.0/libscip-linux.zip -O scip.zip
+    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.10.0/libscip-linux.zip -O scip.zip
 fi
 unzip scip.zip
 mv scip_install scip
@@ -67,10 +67,10 @@ before-all = '''
 #!/bin/bash
 brew install wget zlib gcc
 if [[ $CIBW_ARCHS == *"arm"* ]]; then
-    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.9.0/libscip-macos-arm.zip -O scip.zip
+    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.10.0/libscip-macos-arm.zip -O scip.zip
     export MACOSX_DEPLOYMENT_TARGET=14.0
 else
-    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.9.0/libscip-macos-intel.zip -O scip.zip
+    wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.10.0/libscip-macos-intel.zip -O scip.zip
     export MACOSX_DEPLOYMENT_TARGET=14.0
 fi
 unzip scip.zip
@@ -96,7 +96,7 @@ repair-wheel-command = '''
 skip="pp* cp36* cp37*"
 before-all = [
     "choco install 7zip wget",
-    "wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.9.0/libscip-windows.zip -O scip.zip",
+    "wget https://github.com/scipopt/scipoptsuite-deploy/releases/download/v0.10.0/libscip-windows.zip -O scip.zip",
     "\"C:\\Program Files\\7-Zip\\7z.exe\" x \"scip.zip\" -o\"scip-test\"",
     "mv .\\scip-test\\scip_install .\\test",
     "mv .\\test .\\scip"

setup.py

@@ -118,7 +118,7 @@
 
 setup(
     name="PySCIPOpt",
-    version="5.7.1",
+    version="6.0.0",
     description="Python interface and modeling environment for SCIP",
     long_description=long_description,
     long_description_content_type="text/markdown",

src/pyscipopt/__init__.py

@@ -26,6 +26,7 @@
 from pyscipopt.scip      import Reader as Reader
 from pyscipopt.scip      import Sepa as Sepa
 from pyscipopt.scip      import LP as LP
+from pyscipopt.scip      import IISfinder as IISfinder 
 from pyscipopt.scip      import PY_SCIP_LPPARAM as SCIP_LPPARAM
 from pyscipopt.scip      import readStatistics as readStatistics
 from pyscipopt.scip      import Expr as Expr
@@ -56,3 +57,4 @@
 from pyscipopt.scip      import PY_SCIP_ROWORIGINTYPE as SCIP_ROWORIGINTYPE
 from pyscipopt.scip      import PY_SCIP_SOLORIGIN as SCIP_SOLORIGIN
 from pyscipopt.scip      import PY_SCIP_NODETYPE as SCIP_NODETYPE
+from pyscipopt.scip      import PY_SCIP_IMPLINTTYPE as SCIP_IMPLINTTYPE

src/pyscipopt/_version.py

@@ -1 +1 @@
-__version__: str = '5.7.1'
+__version__: str = '6.0.0'

src/pyscipopt/iisfinder.pxi

@@ -0,0 +1,34 @@
+##@file iisfinder.pxi
+#@brief Base class of the IIS finder Plugin
+cdef class IISfinder:
+    cdef public Model model
+    cdef public str name
+    cdef SCIP_IIS* _iisfinder
+
+    def iisfinderfree(self):
+        '''calls destructor and frees memory of iis finder'''
+        pass
+
+    def iisfinderexec(self):
+        '''calls execution method of iis finder'''
+        raise NotImplementedError("iisfinderexec() is a fundamental callback and should be implemented in the derived class")
+
+
+cdef SCIP_RETCODE PyiisfinderCopy (SCIP* scip, SCIP_IISFINDER* iisfinder) noexcept with gil:
+    return SCIP_OKAY
+
+cdef SCIP_RETCODE PyiisfinderFree (SCIP* scip, SCIP_IISFINDER* iisfinder) noexcept with gil:
+    cdef SCIP_IISFINDERDATA* iisfinderdata
+    iisfinderdata = SCIPiisfinderGetData(iisfinder)
+    PyIIS = <IISfinder>iisfinderdata
+    PyIIS.iisfinderfree()
+    Py_DECREF(PyIIS)
+    return SCIP_OKAY
+
+cdef SCIP_RETCODE PyiisfinderExec (SCIP_IIS* iis, SCIP_IISFINDER* iisfinder, SCIP_RESULT* result) noexcept with gil:
+    cdef SCIP_IISFINDERDATA* iisfinderdata
+    iisfinderdata = SCIPiisfinderGetData(iisfinder)
+    PyIIS = <IISfinder>iisfinderdata
+    result_dict = PyIIS.iisfinderexec()
+    assert isinstance(result_dict, dict), "iisfinderexec() must return a dictionary."
+    return SCIP_OKAY

src/pyscipopt/reader.pxi

@@ -12,7 +12,7 @@ cdef class Reader:
         '''calls read method of reader'''
         return {}
 
-    def readerwrite(self, file, name, transformed, objsense, objscale, objoffset, binvars, intvars,
+    def readerwrite(self, file, name, transformed, objsense, objoffset, objscale, binvars, intvars,
                     implvars, contvars, fixedvars, startnvars, conss, maxnconss, startnconss, genericnames):
         '''calls write method of reader'''
         return {}
@@ -39,10 +39,11 @@ cdef SCIP_RETCODE PyReaderRead (SCIP* scip, SCIP_READER* reader, const char* fil
     return SCIP_OKAY
 
 cdef SCIP_RETCODE PyReaderWrite (SCIP* scip, SCIP_READER* reader, FILE* file,
-                                 const char* name, SCIP_PROBDATA* probdata, SCIP_Bool transformed,
-                                 SCIP_OBJSENSE objsense, SCIP_Real objscale, SCIP_Real objoffset, 
-                                 SCIP_VAR** vars, int nvars, int nbinvars, int nintvars, int nimplvars, int ncontvars,
-                                 SCIP_VAR** fixedvars, int nfixedvars, int startnvars,
+                                 const char* filename, const char* name, SCIP_PROBDATA* probdata, SCIP_Bool transformed,
+                                 SCIP_OBJSENSE objsense, SCIP_Real objoffset, SCIP_Real objscale,
+                                 SCIP_RATIONAL* objoffsetexact, SCIP_RATIONAL* objscaleexact,
+                                 SCIP_VAR** vars, int nvars, int nbinvars, int nintvars, int nimplvars,
+                                 int ncontvars, SCIP_VAR** fixedvars, int nfixedvars, int startnvars,
                                  SCIP_CONS** conss, int nconss, int maxnconss, int startnconss,
                                  SCIP_Bool genericnames, SCIP_RESULT* result) noexcept with gil:
     cdef SCIP_READERDATA* readerdata = SCIPreaderGetData(reader)
@@ -58,7 +59,8 @@ cdef SCIP_RETCODE PyReaderWrite (SCIP* scip, SCIP_READER* reader, FILE* file,
     PyFixedVars = [Variable.create(fixedvars[i]) for i in range(nfixedvars)]
     PyConss = [Constraint.create(conss[i]) for i in range(nconss)]
     PyReader = <Reader>readerdata
-    result_dict = PyReader.readerwrite(PyFile, PyName, transformed, objsense, objscale, objoffset,
+    #TODO: provide rational objoffsetexact and objscaleexact
+    result_dict = PyReader.readerwrite(PyFile, PyName, transformed, objsense, objoffset, objscale,
                                        PyBinVars, PyIntVars, PyImplVars, PyContVars, PyFixedVars, startnvars,
                                        PyConss, maxnconss, startnconss, genericnames)
     result[0] = result_dict.get("result", <SCIP_RESULT>result[0])

src/pyscipopt/recipes/infeasibilities.py

@@ -36,7 +36,7 @@ def get_infeasible_constraints(orig_model: Model, verbose: bool = False):
 
     n_infeasibilities_detected = 0
     for c in binary:
-        if model.isGT(model.getVal(binary[c]), 0):
+        if model.isInfinity(model.getVal(binary[c])) or model.isGT(model.getVal(binary[c]), 0):
             n_infeasibilities_detected += 1
             print("Constraint %s is causing an infeasibility." % c)
 

src/pyscipopt/relax.pxi

@@ -25,10 +25,8 @@ cdef class Relax:
         pass
 
     def relaxexec(self):
-        '''callls execution method of relaxation handler'''
-        print("python error in relaxexec: this method needs to be implemented")
-        return{}
-
+        '''calls execution method of relaxation handler'''
+        raise NotImplementedError("relaxexec() is a fundamental callback and should be implemented in the derived class")
 
 cdef SCIP_RETCODE PyRelaxCopy (SCIP* scip, SCIP_RELAX* relax) noexcept with gil:
     return SCIP_OKAY