./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:35:19,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:35:20,027 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:35:20,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:35:20,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:35:20,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:35:20,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:35:20,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:35:20,058 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:35:20,059 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:35:20,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:35:20,060 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:35:20,060 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:35:20,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:35:20,062 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:35:20,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:35:20,063 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:35:20,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:35:20,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:35:20,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:35:20,063 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:35:20,067 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:35:20,067 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:35:20,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:35:20,067 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:35:20,067 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:35:20,067 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:35:20,068 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:35:20,068 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:35:20,068 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:35:20,068 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:35:20,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:35:20,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:35:20,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:35:20,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:35:20,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:35:20,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:35:20,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:35:20,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:35:20,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:35:20,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:35:20,070 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:35:20,070 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-10-13 12:35:20,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:35:20,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:35:20,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:35:20,309 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:35:20,309 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:35:20,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-13 12:35:21,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:35:21,775 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:35:21,775 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-13 12:35:21,781 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa8be09e/44d368cde1674df78f3c2e13f495d158/FLAG668c7714e [2024-10-13 12:35:22,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa8be09e/44d368cde1674df78f3c2e13f495d158 [2024-10-13 12:35:22,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:35:22,189 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:35:22,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:22,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:35:22,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:35:22,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:22" (1/1) ... [2024-10-13 12:35:22,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504d23ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:22, skipping insertion in model container [2024-10-13 12:35:22,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:22" (1/1) ... [2024-10-13 12:35:22,215 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:35:22,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:22,445 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-13 12:35:22,446 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f47775b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:22, skipping insertion in model container [2024-10-13 12:35:22,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:22,449 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-13 12:35:22,451 INFO L158 Benchmark]: Toolchain (without parser) took 261.04ms. Allocated memory is still 176.2MB. Free memory was 105.9MB in the beginning and 94.1MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-13 12:35:22,455 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 12:35:22,456 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.36ms. Allocated memory is still 176.2MB. Free memory was 105.8MB in the beginning and 94.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-13 12:35:22,457 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory is still 73.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.36ms. Allocated memory is still 176.2MB. Free memory was 105.8MB in the beginning and 94.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:35:24,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:35:24,864 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-13 12:35:24,869 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:35:24,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:35:24,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:35:24,895 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:35:24,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:35:24,896 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:35:24,896 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:35:24,896 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:35:24,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:35:24,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:35:24,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:35:24,899 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:35:24,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:35:24,900 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:35:24,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:35:24,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:35:24,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:35:24,903 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:35:24,905 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:35:24,906 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:35:24,906 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:35:24,906 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:35:24,907 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-13 12:35:24,907 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:35:24,907 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-13 12:35:24,907 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:35:24,907 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:35:24,908 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:35:24,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:35:24,908 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:35:24,909 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:35:24,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:35:24,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:35:24,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:35:24,910 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:35:24,910 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-13 12:35:24,910 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-13 12:35:24,911 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:35:24,911 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:35:24,911 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:35:24,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:35:24,911 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-13 12:35:24,911 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-10-13 12:35:25,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:35:25,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:35:25,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:35:25,215 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:35:25,216 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:35:25,217 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-13 12:35:26,472 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:35:26,632 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:35:26,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-10-13 12:35:26,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fcad715/4d3fa1351f474375bdb6e1c1da8ad31e/FLAG5fff2caac [2024-10-13 12:35:26,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4fcad715/4d3fa1351f474375bdb6e1c1da8ad31e [2024-10-13 12:35:26,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:35:26,651 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:35:26,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:26,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:35:26,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:35:26,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:26,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6addf141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26, skipping insertion in model container [2024-10-13 12:35:26,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:26,682 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:35:26,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:26,883 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-13 12:35:26,887 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:35:26,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:26,919 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:35:26,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:26,968 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:35:26,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26 WrapperNode [2024-10-13 12:35:26,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:26,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:35:26,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:35:26,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:35:26,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:26,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,020 INFO L138 Inliner]: procedures = 27, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 267 [2024-10-13 12:35:27,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:35:27,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:35:27,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:35:27,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:35:27,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,037 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,058 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-13 12:35:27,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,058 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:35:27,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:35:27,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:35:27,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:35:27,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (1/1) ... [2024-10-13 12:35:27,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:35:27,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:35:27,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 12:35:27,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 12:35:27,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 12:35:27,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 12:35:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 12:35:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 12:35:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 12:35:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:35:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:35:27,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:35:27,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-13 12:35:27,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-13 12:35:27,172 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:35:27,365 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:35:27,367 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:35:27,857 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:35:27,858 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:35:28,191 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:35:28,191 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-13 12:35:28,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:35:28 BoogieIcfgContainer [2024-10-13 12:35:28,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:35:28,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:35:28,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:35:28,196 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:35:28,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:35:26" (1/3) ... [2024-10-13 12:35:28,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fced657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:35:28, skipping insertion in model container [2024-10-13 12:35:28,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:26" (2/3) ... [2024-10-13 12:35:28,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fced657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:35:28, skipping insertion in model container [2024-10-13 12:35:28,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:35:28" (3/3) ... [2024-10-13 12:35:28,198 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-10-13 12:35:28,210 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:35:28,211 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-13 12:35:28,211 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:35:28,262 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-13 12:35:28,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-10-13 12:35:28,319 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-10-13 12:35:28,319 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 12:35:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 135 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-10-13 12:35:28,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-10-13 12:35:28,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-10-13 12:35:28,330 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:35:28,335 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6ed16706, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:35:28,335 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-10-13 12:35:28,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:35:28,337 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:35:28,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:35:28,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:28,338 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:35:28,338 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:28,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash 876668, now seen corresponding path program 1 times [2024-10-13 12:35:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:28,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980929138] [2024-10-13 12:35:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:28,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:28,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-13 12:35:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:28,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:35:28,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:28,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:35:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:28,460 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:28,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980929138] [2024-10-13 12:35:28,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980929138] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:28,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:28,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:35:28,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682302578] [2024-10-13 12:35:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:28,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:35:28,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:35:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:35:28,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-13 12:35:28,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:28,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:28,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-13 12:35:28,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:28,735 INFO L124 PetriNetUnfolderBase]: 202/455 cut-off events. [2024-10-13 12:35:28,736 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 12:35:28,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 455 events. 202/455 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2234 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 684. Up to 293 conditions per place. [2024-10-13 12:35:28,741 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-10-13 12:35:28,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-10-13 12:35:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:35:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:35:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-10-13 12:35:28,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-10-13 12:35:28,755 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-10-13 12:35:28,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-10-13 12:35:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 12:35:28,761 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-10-13 12:35:28,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-10-13 12:35:28,765 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-10-13 12:35:28,765 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-10-13 12:35:28,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:28,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:28,765 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:35:28,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-13 12:35:28,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:28,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:28,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:28,967 INFO L85 PathProgramCache]: Analyzing trace with hash 876669, now seen corresponding path program 1 times [2024-10-13 12:35:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:28,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13173661] [2024-10-13 12:35:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:28,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:28,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:28,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-13 12:35:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:29,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 12:35:29,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:29,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:29,071 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:29,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:29,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13173661] [2024-10-13 12:35:29,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13173661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:29,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:35:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466050468] [2024-10-13 12:35:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:29,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:35:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:35:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:35:29,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-13 12:35:29,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:29,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:29,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-13 12:35:29,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:29,326 INFO L124 PetriNetUnfolderBase]: 205/464 cut-off events. [2024-10-13 12:35:29,326 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:35:29,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 464 events. 205/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2271 event pairs, 124 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 746. Up to 306 conditions per place. [2024-10-13 12:35:29,330 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 34 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-10-13 12:35:29,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 214 flow [2024-10-13 12:35:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:35:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:35:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-10-13 12:35:29,332 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-10-13 12:35:29,332 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-10-13 12:35:29,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 214 flow [2024-10-13 12:35:29,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:29,334 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 166 flow [2024-10-13 12:35:29,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2024-10-13 12:35:29,335 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2024-10-13 12:35:29,335 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 166 flow [2024-10-13 12:35:29,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:29,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:29,336 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:35:29,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:29,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:29,537 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:29,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 842507015, now seen corresponding path program 1 times [2024-10-13 12:35:29,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:29,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010009115] [2024-10-13 12:35:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:29,542 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:29,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-13 12:35:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:29,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:29,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:29,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:29,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:29,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:29,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010009115] [2024-10-13 12:35:29,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010009115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:29,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:29,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2024-10-13 12:35:29,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990559654] [2024-10-13 12:35:29,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:29,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:35:29,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:29,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:35:29,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:35:30,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-13 12:35:30,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:30,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:30,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-13 12:35:30,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:30,924 INFO L124 PetriNetUnfolderBase]: 214/491 cut-off events. [2024-10-13 12:35:30,924 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-13 12:35:30,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 491 events. 214/491 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2459 event pairs, 124 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 746. Up to 309 conditions per place. [2024-10-13 12:35:30,930 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 43 selfloop transitions, 25 changer transitions 0/87 dead transitions. [2024-10-13 12:35:30,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 410 flow [2024-10-13 12:35:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:35:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:35:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-10-13 12:35:30,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-10-13 12:35:30,935 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 166 flow. Second operand 6 states and 233 transitions. [2024-10-13 12:35:30,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 410 flow [2024-10-13 12:35:30,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:30,938 INFO L231 Difference]: Finished difference. Result has 59 places, 75 transitions, 327 flow [2024-10-13 12:35:30,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=75} [2024-10-13 12:35:30,939 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-10-13 12:35:30,940 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 75 transitions, 327 flow [2024-10-13 12:35:30,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:30,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:30,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:30,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-13 12:35:31,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:31,143 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:31,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 337738575, now seen corresponding path program 1 times [2024-10-13 12:35:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:31,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218581797] [2024-10-13 12:35:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:31,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:31,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:31,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:31,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-13 12:35:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:31,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:35:31,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:31,230 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:31,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218581797] [2024-10-13 12:35:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218581797] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:31,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:31,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:35:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069276499] [2024-10-13 12:35:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:31,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:35:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:35:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:35:31,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-13 12:35:31,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 75 transitions, 327 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:31,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:31,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-13 12:35:31,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:31,373 INFO L124 PetriNetUnfolderBase]: 211/488 cut-off events. [2024-10-13 12:35:31,373 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-13 12:35:31,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928 conditions, 488 events. 211/488 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2351 event pairs, 124 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 825. Up to 323 conditions per place. [2024-10-13 12:35:31,377 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 41 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-10-13 12:35:31,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 425 flow [2024-10-13 12:35:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:35:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:35:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-13 12:35:31,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-10-13 12:35:31,378 INFO L175 Difference]: Start difference. First operand has 59 places, 75 transitions, 327 flow. Second operand 3 states and 125 transitions. [2024-10-13 12:35:31,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 425 flow [2024-10-13 12:35:31,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 389 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-10-13 12:35:31,382 INFO L231 Difference]: Finished difference. Result has 60 places, 72 transitions, 301 flow [2024-10-13 12:35:31,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=72} [2024-10-13 12:35:31,382 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-10-13 12:35:31,382 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 72 transitions, 301 flow [2024-10-13 12:35:31,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:31,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:31,383 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:35:31,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-13 12:35:31,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:31,583 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:31,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2084959323, now seen corresponding path program 2 times [2024-10-13 12:35:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:31,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176514854] [2024-10-13 12:35:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:35:31,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:31,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:31,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:31,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-13 12:35:31,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:35:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:35:31,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 12:35:31,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:31,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:31,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:32,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:32,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176514854] [2024-10-13 12:35:32,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176514854] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:32,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:32,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-13 12:35:32,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668006105] [2024-10-13 12:35:32,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:32,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:35:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:32,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:35:32,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:35:33,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-13 12:35:33,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 72 transitions, 301 flow. Second operand has 14 states, 14 states have (on average 27.571428571428573) internal successors, (386), 14 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:33,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:33,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-13 12:35:33,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:41,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-13 12:35:46,425 INFO L124 PetriNetUnfolderBase]: 217/530 cut-off events. [2024-10-13 12:35:46,425 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-10-13 12:35:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 530 events. 217/530 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2382 event pairs, 124 based on Foata normal form. 30/471 useless extension candidates. Maximal degree in co-relation 836. Up to 310 conditions per place. [2024-10-13 12:35:46,429 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 44 selfloop transitions, 63 changer transitions 0/126 dead transitions. [2024-10-13 12:35:46,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 126 transitions, 720 flow [2024-10-13 12:35:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 12:35:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 12:35:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 579 transitions. [2024-10-13 12:35:46,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5676470588235294 [2024-10-13 12:35:46,432 INFO L175 Difference]: Start difference. First operand has 60 places, 72 transitions, 301 flow. Second operand 17 states and 579 transitions. [2024-10-13 12:35:46,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 126 transitions, 720 flow [2024-10-13 12:35:46,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 126 transitions, 688 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:46,440 INFO L231 Difference]: Finished difference. Result has 85 places, 111 transitions, 725 flow [2024-10-13 12:35:46,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=725, PETRI_PLACES=85, PETRI_TRANSITIONS=111} [2024-10-13 12:35:46,442 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2024-10-13 12:35:46,442 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 111 transitions, 725 flow [2024-10-13 12:35:46,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.571428571428573) internal successors, (386), 14 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:46,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:46,444 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-13 12:35:46,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:46,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:46,645 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:46,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:46,646 INFO L85 PathProgramCache]: Analyzing trace with hash -404000415, now seen corresponding path program 3 times [2024-10-13 12:35:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:46,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826817035] [2024-10-13 12:35:46,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:35:46,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:46,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:46,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:46,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-13 12:35:46,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-13 12:35:46,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:35:46,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 12:35:46,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:46,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:47,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:48,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826817035] [2024-10-13 12:35:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826817035] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:48,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:48,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-13 12:35:48,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923074284] [2024-10-13 12:35:48,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:48,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 12:35:48,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 12:35:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2024-10-13 12:35:53,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-13 12:35:53,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 725 flow. Second operand has 25 states, 25 states have (on average 27.84) internal successors, (696), 25 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:53,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:53,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-13 12:35:53,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:54,833 INFO L124 PetriNetUnfolderBase]: 199/476 cut-off events. [2024-10-13 12:35:54,833 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-10-13 12:35:54,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 476 events. 199/476 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2219 event pairs, 124 based on Foata normal form. 3/390 useless extension candidates. Maximal degree in co-relation 949. Up to 293 conditions per place. [2024-10-13 12:35:54,836 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 34 selfloop transitions, 19 changer transitions 0/72 dead transitions. [2024-10-13 12:35:54,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 526 flow [2024-10-13 12:35:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:35:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:35:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 264 transitions. [2024-10-13 12:35:54,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-13 12:35:54,838 INFO L175 Difference]: Start difference. First operand has 85 places, 111 transitions, 725 flow. Second operand 8 states and 264 transitions. [2024-10-13 12:35:54,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 526 flow [2024-10-13 12:35:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 72 transitions, 328 flow, removed 68 selfloop flow, removed 15 redundant places. [2024-10-13 12:35:54,840 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 212 flow [2024-10-13 12:35:54,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=212, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-10-13 12:35:54,841 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-10-13 12:35:54,841 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 212 flow [2024-10-13 12:35:54,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 27.84) internal successors, (696), 25 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:54,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:54,841 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:54,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-13 12:35:55,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:55,042 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:55,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash -501029199, now seen corresponding path program 1 times [2024-10-13 12:35:55,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:55,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100849735] [2024-10-13 12:35:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:55,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:55,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-13 12:35:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:55,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:55,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:55,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:35:55,349 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-13 12:35:55,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-13 12:35:55,392 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-13 12:35:55,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-13 12:35:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:35:55,423 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:55,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:55,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100849735] [2024-10-13 12:35:55,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100849735] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:55,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:55,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:35:55,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741239556] [2024-10-13 12:35:55,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:55,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:35:55,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:35:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:35:55,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-13 12:35:55,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:55,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:55,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-13 12:35:55,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:55,669 INFO L124 PetriNetUnfolderBase]: 340/756 cut-off events. [2024-10-13 12:35:55,669 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-10-13 12:35:55,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 756 events. 340/756 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4145 event pairs, 234 based on Foata normal form. 0/642 useless extension candidates. Maximal degree in co-relation 1359. Up to 494 conditions per place. [2024-10-13 12:35:55,672 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 40 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2024-10-13 12:35:55,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 294 flow [2024-10-13 12:35:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-13 12:35:55,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-13 12:35:55,674 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 212 flow. Second operand 5 states and 143 transitions. [2024-10-13 12:35:55,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 294 flow [2024-10-13 12:35:55,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-13 12:35:55,675 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 176 flow [2024-10-13 12:35:55,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-10-13 12:35:55,676 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-10-13 12:35:55,676 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 176 flow [2024-10-13 12:35:55,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:55,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:55,676 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:55,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-13 12:35:55,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:55,881 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:55,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -501029198, now seen corresponding path program 1 times [2024-10-13 12:35:55,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:55,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410700591] [2024-10-13 12:35:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:55,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:55,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:55,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:55,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-13 12:35:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:56,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:35:56,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:56,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:56,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:35:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:56,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:35:56,280 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:56,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:56,341 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:35:56,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:35:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:35:56,401 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:56,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410700591] [2024-10-13 12:35:56,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410700591] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:56,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:56,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:35:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492937547] [2024-10-13 12:35:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:56,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:56,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:56,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:56,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:56,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-13 12:35:56,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:56,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:56,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-13 12:35:56,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:56,681 INFO L124 PetriNetUnfolderBase]: 397/899 cut-off events. [2024-10-13 12:35:56,681 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:35:56,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 899 events. 397/899 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5005 event pairs, 169 based on Foata normal form. 26/787 useless extension candidates. Maximal degree in co-relation 1578. Up to 377 conditions per place. [2024-10-13 12:35:56,685 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 54 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-10-13 12:35:56,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 333 flow [2024-10-13 12:35:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:35:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:35:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-13 12:35:56,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-13 12:35:56,686 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 176 flow. Second operand 6 states and 198 transitions. [2024-10-13 12:35:56,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 333 flow [2024-10-13 12:35:56,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 75 transitions, 328 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:35:56,687 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 189 flow [2024-10-13 12:35:56,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-10-13 12:35:56,688 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-10-13 12:35:56,688 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 189 flow [2024-10-13 12:35:56,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:56,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:56,688 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:56,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-13 12:35:56,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:56,892 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:56,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964879, now seen corresponding path program 1 times [2024-10-13 12:35:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:56,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315165280] [2024-10-13 12:35:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:56,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:56,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:56,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:56,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-13 12:35:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:57,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:35:57,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:57,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:35:57,257 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-13 12:35:57,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-13 12:35:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:35:57,325 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:57,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315165280] [2024-10-13 12:35:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315165280] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:57,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:35:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095838760] [2024-10-13 12:35:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:57,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:35:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:35:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:35:57,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-13 12:35:57,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:57,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:57,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-13 12:35:57,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:57,606 INFO L124 PetriNetUnfolderBase]: 427/843 cut-off events. [2024-10-13 12:35:57,606 INFO L125 PetriNetUnfolderBase]: For 176/203 co-relation queries the response was YES. [2024-10-13 12:35:57,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 843 events. 427/843 cut-off events. For 176/203 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4107 event pairs, 299 based on Foata normal form. 58/830 useless extension candidates. Maximal degree in co-relation 1691. Up to 624 conditions per place. [2024-10-13 12:35:57,611 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 40 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-10-13 12:35:57,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 271 flow [2024-10-13 12:35:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-10-13 12:35:57,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-10-13 12:35:57,612 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 189 flow. Second operand 5 states and 147 transitions. [2024-10-13 12:35:57,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 271 flow [2024-10-13 12:35:57,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 263 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:35:57,614 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 183 flow [2024-10-13 12:35:57,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-10-13 12:35:57,615 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-10-13 12:35:57,615 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 183 flow [2024-10-13 12:35:57,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:57,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:57,616 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:57,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-13 12:35:57,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:57,820 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:57,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964880, now seen corresponding path program 1 times [2024-10-13 12:35:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:57,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396456436] [2024-10-13 12:35:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:57,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:57,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:57,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-13 12:35:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:58,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 12:35:58,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:58,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:35:58,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:58,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:35:58,344 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:58,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:35:58,437 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:58,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396456436] [2024-10-13 12:35:58,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396456436] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:58,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:58,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:35:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796447719] [2024-10-13 12:35:58,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:58,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:58,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-13 12:35:58,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:58,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:58,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-13 12:35:58,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:58,848 INFO L124 PetriNetUnfolderBase]: 397/822 cut-off events. [2024-10-13 12:35:58,849 INFO L125 PetriNetUnfolderBase]: For 83/106 co-relation queries the response was YES. [2024-10-13 12:35:58,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 822 events. 397/822 cut-off events. For 83/106 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4086 event pairs, 169 based on Foata normal form. 26/760 useless extension candidates. Maximal degree in co-relation 1581. Up to 377 conditions per place. [2024-10-13 12:35:58,855 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-10-13 12:35:58,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 338 flow [2024-10-13 12:35:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:35:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:35:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-10-13 12:35:58,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-13 12:35:58,857 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 183 flow. Second operand 6 states and 198 transitions. [2024-10-13 12:35:58,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 338 flow [2024-10-13 12:35:58,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 333 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:35:58,862 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 192 flow [2024-10-13 12:35:58,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-10-13 12:35:58,863 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-10-13 12:35:58,863 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 192 flow [2024-10-13 12:35:58,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:58,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:58,864 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:58,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-13 12:35:59,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:59,066 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:35:59,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -498865560, now seen corresponding path program 1 times [2024-10-13 12:35:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:59,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133072956] [2024-10-13 12:35:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:59,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:59,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:59,072 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:59,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-13 12:35:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:59,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:35:59,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:59,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:35:59,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:35:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:59,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:35:59,590 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:59,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:59,647 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:35:59,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:35:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:35:59,729 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:59,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133072956] [2024-10-13 12:35:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133072956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:59,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:35:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763873662] [2024-10-13 12:35:59,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:59,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:59,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-13 12:35:59,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:59,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:59,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-13 12:35:59,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:00,125 INFO L124 PetriNetUnfolderBase]: 665/1395 cut-off events. [2024-10-13 12:36:00,125 INFO L125 PetriNetUnfolderBase]: For 527/572 co-relation queries the response was YES. [2024-10-13 12:36:00,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 1395 events. 665/1395 cut-off events. For 527/572 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8558 event pairs, 315 based on Foata normal form. 46/1273 useless extension candidates. Maximal degree in co-relation 2781. Up to 650 conditions per place. [2024-10-13 12:36:00,132 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-10-13 12:36:00,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 358 flow [2024-10-13 12:36:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:36:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:36:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-10-13 12:36:00,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-10-13 12:36:00,133 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 192 flow. Second operand 6 states and 196 transitions. [2024-10-13 12:36:00,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 358 flow [2024-10-13 12:36:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 344 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 12:36:00,135 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 200 flow [2024-10-13 12:36:00,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-10-13 12:36:00,135 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-10-13 12:36:00,136 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 200 flow [2024-10-13 12:36:00,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:00,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:00,136 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:00,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-13 12:36:00,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:00,337 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:00,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1715037667, now seen corresponding path program 1 times [2024-10-13 12:36:00,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:00,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065534413] [2024-10-13 12:36:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:00,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:00,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:00,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-13 12:36:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:00,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:36:00,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:00,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:00,642 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:00,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:00,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065534413] [2024-10-13 12:36:00,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065534413] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:00,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:00,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:36:00,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048749768] [2024-10-13 12:36:00,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:00,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:36:00,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:00,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:36:00,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:36:00,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-13 12:36:00,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:00,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:00,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-13 12:36:00,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:00,986 INFO L124 PetriNetUnfolderBase]: 665/1343 cut-off events. [2024-10-13 12:36:00,986 INFO L125 PetriNetUnfolderBase]: For 498/566 co-relation queries the response was YES. [2024-10-13 12:36:00,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2833 conditions, 1343 events. 665/1343 cut-off events. For 498/566 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7827 event pairs, 315 based on Foata normal form. 46/1267 useless extension candidates. Maximal degree in co-relation 2821. Up to 650 conditions per place. [2024-10-13 12:36:00,992 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 55 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2024-10-13 12:36:00,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 360 flow [2024-10-13 12:36:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:36:00,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:36:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-10-13 12:36:00,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-13 12:36:00,993 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 200 flow. Second operand 5 states and 186 transitions. [2024-10-13 12:36:00,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 360 flow [2024-10-13 12:36:00,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 352 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:00,994 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 204 flow [2024-10-13 12:36:00,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-10-13 12:36:00,995 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-10-13 12:36:00,995 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 204 flow [2024-10-13 12:36:00,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:00,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:00,995 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:01,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:01,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:01,196 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:01,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1148653099, now seen corresponding path program 1 times [2024-10-13 12:36:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932025111] [2024-10-13 12:36:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:01,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:01,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:01,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-13 12:36:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:01,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 12:36:01,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:01,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:01,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:36:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:01,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:36:01,566 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:01,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:01,621 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:36:01,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:36:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:01,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:02,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:02,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932025111] [2024-10-13 12:36:02,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932025111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:02,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:02,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-13 12:36:02,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887991381] [2024-10-13 12:36:02,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:02,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 12:36:02,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:02,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 12:36:02,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-13 12:36:03,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:36:03,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 204 flow. Second operand has 11 states, 11 states have (on average 26.727272727272727) internal successors, (294), 11 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:03,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:03,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:36:03,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:04,362 INFO L124 PetriNetUnfolderBase]: 1733/3151 cut-off events. [2024-10-13 12:36:04,362 INFO L125 PetriNetUnfolderBase]: For 1724/1819 co-relation queries the response was YES. [2024-10-13 12:36:04,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 3151 events. 1733/3151 cut-off events. For 1724/1819 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18698 event pairs, 285 based on Foata normal form. 126/3166 useless extension candidates. Maximal degree in co-relation 7178. Up to 577 conditions per place. [2024-10-13 12:36:04,381 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 110 selfloop transitions, 9 changer transitions 0/132 dead transitions. [2024-10-13 12:36:04,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 132 transitions, 662 flow [2024-10-13 12:36:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:36:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:36:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 321 transitions. [2024-10-13 12:36:04,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-10-13 12:36:04,384 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 204 flow. Second operand 9 states and 321 transitions. [2024-10-13 12:36:04,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 132 transitions, 662 flow [2024-10-13 12:36:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 132 transitions, 638 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:04,387 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 243 flow [2024-10-13 12:36:04,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=243, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-10-13 12:36:04,388 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 14 predicate places. [2024-10-13 12:36:04,388 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 243 flow [2024-10-13 12:36:04,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.727272727272727) internal successors, (294), 11 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:04,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:04,388 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:04,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:04,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:04,590 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:04,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1715037666, now seen corresponding path program 1 times [2024-10-13 12:36:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:04,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173358490] [2024-10-13 12:36:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:04,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:04,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-13 12:36:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:04,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:36:04,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:04,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:36:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:04,906 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:04,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:04,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173358490] [2024-10-13 12:36:04,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173358490] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:04,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:04,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:36:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317605389] [2024-10-13 12:36:04,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:04,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:36:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:36:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:36:04,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:36:04,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:04,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:04,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:36:04,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:05,252 INFO L124 PetriNetUnfolderBase]: 1207/2423 cut-off events. [2024-10-13 12:36:05,252 INFO L125 PetriNetUnfolderBase]: For 1838/1925 co-relation queries the response was YES. [2024-10-13 12:36:05,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2423 events. 1207/2423 cut-off events. For 1838/1925 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15423 event pairs, 958 based on Foata normal form. 140/2354 useless extension candidates. Maximal degree in co-relation 5457. Up to 1794 conditions per place. [2024-10-13 12:36:05,265 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 43 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-13 12:36:05,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 59 transitions, 329 flow [2024-10-13 12:36:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:36:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:36:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-10-13 12:36:05,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-10-13 12:36:05,266 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 243 flow. Second operand 4 states and 127 transitions. [2024-10-13 12:36:05,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 59 transitions, 329 flow [2024-10-13 12:36:05,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 59 transitions, 316 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:05,268 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 230 flow [2024-10-13 12:36:05,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-10-13 12:36:05,269 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-10-13 12:36:05,269 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 230 flow [2024-10-13 12:36:05,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:05,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:05,269 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:05,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:05,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:05,470 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:05,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1248506867, now seen corresponding path program 1 times [2024-10-13 12:36:05,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:05,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525383654] [2024-10-13 12:36:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:05,472 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:05,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-13 12:36:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:05,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 12:36:05,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:05,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:05,935 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:36:05,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:36:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:06,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:06,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:06,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525383654] [2024-10-13 12:36:06,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525383654] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:06,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:06,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:36:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750750165] [2024-10-13 12:36:06,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:06,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:36:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:36:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:36:07,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-13 12:36:07,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 230 flow. Second operand has 10 states, 10 states have (on average 30.5) internal successors, (305), 10 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:07,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:07,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-13 12:36:07,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:08,092 INFO L124 PetriNetUnfolderBase]: 1345/2513 cut-off events. [2024-10-13 12:36:08,092 INFO L125 PetriNetUnfolderBase]: For 1511/1599 co-relation queries the response was YES. [2024-10-13 12:36:08,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 2513 events. 1345/2513 cut-off events. For 1511/1599 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14425 event pairs, 301 based on Foata normal form. 126/2555 useless extension candidates. Maximal degree in co-relation 5853. Up to 619 conditions per place. [2024-10-13 12:36:08,102 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 107 selfloop transitions, 8 changer transitions 0/128 dead transitions. [2024-10-13 12:36:08,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 128 transitions, 654 flow [2024-10-13 12:36:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:36:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:36:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 353 transitions. [2024-10-13 12:36:08,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6537037037037037 [2024-10-13 12:36:08,103 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 230 flow. Second operand 9 states and 353 transitions. [2024-10-13 12:36:08,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 128 transitions, 654 flow [2024-10-13 12:36:08,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 651 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:36:08,107 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 263 flow [2024-10-13 12:36:08,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=263, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2024-10-13 12:36:08,107 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-10-13 12:36:08,107 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 263 flow [2024-10-13 12:36:08,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.5) internal successors, (305), 10 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:08,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:08,108 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:08,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-13 12:36:08,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:08,312 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:08,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1592009336, now seen corresponding path program 1 times [2024-10-13 12:36:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708525610] [2024-10-13 12:36:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:08,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:08,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-13 12:36:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:08,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 12:36:08,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:08,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:08,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:36:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:08,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:36:08,677 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:08,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:08,754 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:08,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:08,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708525610] [2024-10-13 12:36:08,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708525610] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:08,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:08,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:36:08,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118853637] [2024-10-13 12:36:08,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:08,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:36:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:36:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:36:08,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-13 12:36:08,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:08,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:08,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-13 12:36:08,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:09,476 INFO L124 PetriNetUnfolderBase]: 2253/4258 cut-off events. [2024-10-13 12:36:09,477 INFO L125 PetriNetUnfolderBase]: For 4852/5117 co-relation queries the response was YES. [2024-10-13 12:36:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10095 conditions, 4258 events. 2253/4258 cut-off events. For 4852/5117 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 29065 event pairs, 1256 based on Foata normal form. 145/4324 useless extension candidates. Maximal degree in co-relation 10075. Up to 2316 conditions per place. [2024-10-13 12:36:09,498 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 60 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2024-10-13 12:36:09,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 484 flow [2024-10-13 12:36:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:36:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:36:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-10-13 12:36:09,500 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-10-13 12:36:09,500 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 263 flow. Second operand 6 states and 194 transitions. [2024-10-13 12:36:09,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 484 flow [2024-10-13 12:36:09,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 78 transitions, 462 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-13 12:36:09,505 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 267 flow [2024-10-13 12:36:09,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-10-13 12:36:09,505 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 19 predicate places. [2024-10-13 12:36:09,505 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 267 flow [2024-10-13 12:36:09,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:09,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:09,506 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:09,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-13 12:36:09,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:09,707 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:09,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2107650012, now seen corresponding path program 1 times [2024-10-13 12:36:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586506713] [2024-10-13 12:36:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:09,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:09,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:09,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:09,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-13 12:36:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:09,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:36:09,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:09,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:10,127 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:10,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586506713] [2024-10-13 12:36:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586506713] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:10,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:10,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:36:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15611646] [2024-10-13 12:36:10,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:10,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:36:10,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:36:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:36:10,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-13 12:36:10,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:10,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:10,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-13 12:36:10,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:10,707 INFO L124 PetriNetUnfolderBase]: 2253/3948 cut-off events. [2024-10-13 12:36:10,707 INFO L125 PetriNetUnfolderBase]: For 4310/4585 co-relation queries the response was YES. [2024-10-13 12:36:10,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10133 conditions, 3948 events. 2253/3948 cut-off events. For 4310/4585 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 24891 event pairs, 1256 based on Foata normal form. 145/3879 useless extension candidates. Maximal degree in co-relation 10112. Up to 2316 conditions per place. [2024-10-13 12:36:10,723 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 61 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-10-13 12:36:10,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 478 flow [2024-10-13 12:36:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:36:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:36:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-10-13 12:36:10,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-10-13 12:36:10,727 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 267 flow. Second operand 5 states and 184 transitions. [2024-10-13 12:36:10,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 478 flow [2024-10-13 12:36:10,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 470 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:10,764 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 271 flow [2024-10-13 12:36:10,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-10-13 12:36:10,765 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-10-13 12:36:10,765 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 271 flow [2024-10-13 12:36:10,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:10,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:10,766 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:10,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:10,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:10,970 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:10,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1116213944, now seen corresponding path program 1 times [2024-10-13 12:36:10,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:10,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103089469] [2024-10-13 12:36:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:10,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:10,974 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:10,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-13 12:36:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:11,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 12:36:11,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:11,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:36:11,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:11,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:36:11,385 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:11,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:11,443 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:36:11,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:36:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:11,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:12,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:12,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103089469] [2024-10-13 12:36:12,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103089469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:12,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:12,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2024-10-13 12:36:12,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827128278] [2024-10-13 12:36:12,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:12,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 12:36:12,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 12:36:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-13 12:36:13,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:36:13,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 271 flow. Second operand has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 11 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:13,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:13,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:36:13,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:15,158 INFO L124 PetriNetUnfolderBase]: 6052/10424 cut-off events. [2024-10-13 12:36:15,158 INFO L125 PetriNetUnfolderBase]: For 13095/13780 co-relation queries the response was YES. [2024-10-13 12:36:15,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27471 conditions, 10424 events. 6052/10424 cut-off events. For 13095/13780 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 73687 event pairs, 1204 based on Foata normal form. 471/10735 useless extension candidates. Maximal degree in co-relation 27449. Up to 2063 conditions per place. [2024-10-13 12:36:15,236 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 122 selfloop transitions, 9 changer transitions 0/143 dead transitions. [2024-10-13 12:36:15,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 143 transitions, 909 flow [2024-10-13 12:36:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:36:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:36:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 313 transitions. [2024-10-13 12:36:15,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5796296296296296 [2024-10-13 12:36:15,238 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 271 flow. Second operand 9 states and 313 transitions. [2024-10-13 12:36:15,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 143 transitions, 909 flow [2024-10-13 12:36:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 885 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:15,250 INFO L231 Difference]: Finished difference. Result has 88 places, 64 transitions, 310 flow [2024-10-13 12:36:15,251 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=88, PETRI_TRANSITIONS=64} [2024-10-13 12:36:15,251 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-10-13 12:36:15,251 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 64 transitions, 310 flow [2024-10-13 12:36:15,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.09090909090909) internal successors, (298), 11 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:15,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:15,252 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:15,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-13 12:36:15,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:15,452 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:15,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash -242893053, now seen corresponding path program 1 times [2024-10-13 12:36:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:15,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497432692] [2024-10-13 12:36:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:15,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:15,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:15,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:15,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-13 12:36:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:15,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:36:15,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:15,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:15,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:16,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497432692] [2024-10-13 12:36:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497432692] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:16,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:16,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:36:16,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840888131] [2024-10-13 12:36:16,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:16,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:36:16,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:36:16,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:36:16,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-13 12:36:16,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 64 transitions, 310 flow. Second operand has 10 states, 10 states have (on average 30.6) internal successors, (306), 10 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:16,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:16,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-13 12:36:16,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:18,273 INFO L124 PetriNetUnfolderBase]: 4576/8323 cut-off events. [2024-10-13 12:36:18,273 INFO L125 PetriNetUnfolderBase]: For 12977/13576 co-relation queries the response was YES. [2024-10-13 12:36:18,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23124 conditions, 8323 events. 4576/8323 cut-off events. For 12977/13576 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 60129 event pairs, 1204 based on Foata normal form. 471/8534 useless extension candidates. Maximal degree in co-relation 23098. Up to 2220 conditions per place. [2024-10-13 12:36:18,322 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 120 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2024-10-13 12:36:18,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 916 flow [2024-10-13 12:36:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:36:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:36:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 317 transitions. [2024-10-13 12:36:18,327 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-10-13 12:36:18,327 INFO L175 Difference]: Start difference. First operand has 88 places, 64 transitions, 310 flow. Second operand 8 states and 317 transitions. [2024-10-13 12:36:18,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 916 flow [2024-10-13 12:36:18,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 141 transitions, 901 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:18,353 INFO L231 Difference]: Finished difference. Result has 94 places, 65 transitions, 331 flow [2024-10-13 12:36:18,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=94, PETRI_TRANSITIONS=65} [2024-10-13 12:36:18,354 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 34 predicate places. [2024-10-13 12:36:18,354 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 65 transitions, 331 flow [2024-10-13 12:36:18,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.6) internal successors, (306), 10 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:18,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:18,354 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:18,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-10-13 12:36:18,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:18,559 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:18,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1772872159, now seen corresponding path program 1 times [2024-10-13 12:36:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:18,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457128893] [2024-10-13 12:36:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:18,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:18,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:18,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-10-13 12:36:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:18,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 12:36:18,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:18,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:36:18,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:18,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:36:19,005 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:19,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:19,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:19,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457128893] [2024-10-13 12:36:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457128893] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:19,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:36:19,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112125456] [2024-10-13 12:36:19,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:19,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:36:19,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:36:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:36:20,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:36:20,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 65 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:20,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:20,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:36:20,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:23,264 INFO L124 PetriNetUnfolderBase]: 12347/20823 cut-off events. [2024-10-13 12:36:23,264 INFO L125 PetriNetUnfolderBase]: For 40842/42357 co-relation queries the response was YES. [2024-10-13 12:36:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59373 conditions, 20823 events. 12347/20823 cut-off events. For 40842/42357 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 160695 event pairs, 2903 based on Foata normal form. 966/21427 useless extension candidates. Maximal degree in co-relation 59344. Up to 4748 conditions per place. [2024-10-13 12:36:23,369 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 129 selfloop transitions, 9 changer transitions 0/151 dead transitions. [2024-10-13 12:36:23,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 151 transitions, 1115 flow [2024-10-13 12:36:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:36:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:36:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 305 transitions. [2024-10-13 12:36:23,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-10-13 12:36:23,371 INFO L175 Difference]: Start difference. First operand has 94 places, 65 transitions, 331 flow. Second operand 9 states and 305 transitions. [2024-10-13 12:36:23,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 151 transitions, 1115 flow [2024-10-13 12:36:23,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 151 transitions, 1071 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 12:36:23,395 INFO L231 Difference]: Finished difference. Result has 100 places, 68 transitions, 366 flow [2024-10-13 12:36:23,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=100, PETRI_TRANSITIONS=68} [2024-10-13 12:36:23,395 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2024-10-13 12:36:23,395 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 68 transitions, 366 flow [2024-10-13 12:36:23,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:23,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:23,395 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:23,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2024-10-13 12:36:23,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:23,596 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:23,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:23,597 INFO L85 PathProgramCache]: Analyzing trace with hash 875538771, now seen corresponding path program 1 times [2024-10-13 12:36:23,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013272725] [2024-10-13 12:36:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:23,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:23,598 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:23,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-10-13 12:36:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:23,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:36:23,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:23,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:24,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:24,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:24,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013272725] [2024-10-13 12:36:24,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013272725] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:24,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:24,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:36:24,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478276961] [2024-10-13 12:36:24,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:24,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:36:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:36:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:36:25,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-13 12:36:25,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 68 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:25,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:25,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-13 12:36:25,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:27,797 INFO L124 PetriNetUnfolderBase]: 9387/17502 cut-off events. [2024-10-13 12:36:27,798 INFO L125 PetriNetUnfolderBase]: For 35933/37081 co-relation queries the response was YES. [2024-10-13 12:36:27,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52103 conditions, 17502 events. 9387/17502 cut-off events. For 35933/37081 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 145079 event pairs, 2903 based on Foata normal form. 966/18238 useless extension candidates. Maximal degree in co-relation 52070. Up to 5070 conditions per place. [2024-10-13 12:36:27,923 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 127 selfloop transitions, 7 changer transitions 0/149 dead transitions. [2024-10-13 12:36:27,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 149 transitions, 1102 flow [2024-10-13 12:36:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:36:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:36:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-10-13 12:36:27,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-10-13 12:36:27,925 INFO L175 Difference]: Start difference. First operand has 100 places, 68 transitions, 366 flow. Second operand 8 states and 309 transitions. [2024-10-13 12:36:27,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 149 transitions, 1102 flow [2024-10-13 12:36:28,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 149 transitions, 1087 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:28,004 INFO L231 Difference]: Finished difference. Result has 106 places, 69 transitions, 387 flow [2024-10-13 12:36:28,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=106, PETRI_TRANSITIONS=69} [2024-10-13 12:36:28,005 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2024-10-13 12:36:28,005 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 69 transitions, 387 flow [2024-10-13 12:36:28,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:28,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:28,005 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:28,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2024-10-13 12:36:28,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:28,206 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:28,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1637851378, now seen corresponding path program 2 times [2024-10-13 12:36:28,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:28,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969866699] [2024-10-13 12:36:28,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:36:28,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:28,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:28,210 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:28,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-10-13 12:36:28,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:36:28,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:36:28,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 12:36:28,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:28,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:36:28,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:36:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:28,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:36:28,762 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:28,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:28,805 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:36:28,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:36:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:28,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:29,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:29,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969866699] [2024-10-13 12:36:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969866699] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:29,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:29,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2024-10-13 12:36:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391407966] [2024-10-13 12:36:29,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:29,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 12:36:29,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:29,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 12:36:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-10-13 12:36:35,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 12:36:37,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 12:36:37,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-13 12:36:37,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 69 transitions, 387 flow. Second operand has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:37,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:37,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-13 12:36:37,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:48,449 INFO L124 PetriNetUnfolderBase]: 32563/49236 cut-off events. [2024-10-13 12:36:48,449 INFO L125 PetriNetUnfolderBase]: For 137916/142257 co-relation queries the response was YES. [2024-10-13 12:36:48,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165558 conditions, 49236 events. 32563/49236 cut-off events. For 137916/142257 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 355118 event pairs, 3030 based on Foata normal form. 1596/47326 useless extension candidates. Maximal degree in co-relation 165522. Up to 7206 conditions per place. [2024-10-13 12:36:49,148 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 396 selfloop transitions, 20 changer transitions 0/428 dead transitions. [2024-10-13 12:36:49,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 428 transitions, 3257 flow [2024-10-13 12:36:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 12:36:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 12:36:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 722 transitions. [2024-10-13 12:36:49,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016666666666667 [2024-10-13 12:36:49,155 INFO L175 Difference]: Start difference. First operand has 106 places, 69 transitions, 387 flow. Second operand 20 states and 722 transitions. [2024-10-13 12:36:49,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 428 transitions, 3257 flow [2024-10-13 12:36:49,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 428 transitions, 3125 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 12:36:49,366 INFO L231 Difference]: Finished difference. Result has 131 places, 80 transitions, 522 flow [2024-10-13 12:36:49,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=522, PETRI_PLACES=131, PETRI_TRANSITIONS=80} [2024-10-13 12:36:49,371 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 71 predicate places. [2024-10-13 12:36:49,371 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 80 transitions, 522 flow [2024-10-13 12:36:49,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.88888888888889) internal successors, (448), 18 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:49,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:49,371 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:49,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2024-10-13 12:36:49,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:49,572 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:49,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:49,573 INFO L85 PathProgramCache]: Analyzing trace with hash -968751051, now seen corresponding path program 1 times [2024-10-13 12:36:49,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:49,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004707100] [2024-10-13 12:36:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:49,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:49,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:49,577 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:49,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2024-10-13 12:36:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:50,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:36:50,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:50,210 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:50,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:50,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004707100] [2024-10-13 12:36:50,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004707100] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:50,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:50,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:36:50,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270356313] [2024-10-13 12:36:50,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:50,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:36:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:36:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:36:50,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-13 12:36:50,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 80 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:50,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:50,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-13 12:36:50,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:57,009 INFO L124 PetriNetUnfolderBase]: 18527/36892 cut-off events. [2024-10-13 12:36:57,010 INFO L125 PetriNetUnfolderBase]: For 100487/103916 co-relation queries the response was YES. [2024-10-13 12:36:57,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115905 conditions, 36892 events. 18527/36892 cut-off events. For 100487/103916 co-relation queries the response was YES. Maximal size of possible extension queue 821. Compared 349140 event pairs, 1790 based on Foata normal form. 220/36852 useless extension candidates. Maximal degree in co-relation 115857. Up to 23485 conditions per place. [2024-10-13 12:36:57,739 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 90 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2024-10-13 12:36:57,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 117 transitions, 1001 flow [2024-10-13 12:36:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:36:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:36:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-10-13 12:36:57,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-13 12:36:57,745 INFO L175 Difference]: Start difference. First operand has 131 places, 80 transitions, 522 flow. Second operand 4 states and 162 transitions. [2024-10-13 12:36:57,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 117 transitions, 1001 flow [2024-10-13 12:36:58,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 978 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-13 12:36:58,601 INFO L231 Difference]: Finished difference. Result has 129 places, 82 transitions, 549 flow [2024-10-13 12:36:58,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=549, PETRI_PLACES=129, PETRI_TRANSITIONS=82} [2024-10-13 12:36:58,605 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 69 predicate places. [2024-10-13 12:36:58,605 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 82 transitions, 549 flow [2024-10-13 12:36:58,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:58,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:58,606 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:58,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2024-10-13 12:36:58,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:58,806 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-13 12:36:58,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:58,807 INFO L85 PathProgramCache]: Analyzing trace with hash -32911847, now seen corresponding path program 2 times [2024-10-13 12:36:58,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:58,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27118626] [2024-10-13 12:36:58,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:36:58,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:58,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:58,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:58,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-10-13 12:36:58,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:36:58,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:36:58,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:36:58,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-10-13 12:36:59,086 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:59,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27118626] [2024-10-13 12:36:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27118626] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:59,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:59,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:36:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143108412] [2024-10-13 12:36:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:59,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:36:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:36:59,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:36:59,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-13 12:36:59,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 82 transitions, 549 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:59,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:59,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-13 12:36:59,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand