./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-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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-word-symm.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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:16:56,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:16:56,743 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:16:56,747 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:16:56,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:16:56,772 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:16:56,774 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:16:56,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:16:56,776 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:16:56,778 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:16:56,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:16:56,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:16:56,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:16:56,780 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:16:56,780 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:16:56,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:16:56,780 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:16:56,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:16:56,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:16:56,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:16:56,782 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:16:56,783 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:16:56,783 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:16:56,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:16:56,783 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:16:56,784 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:16:56,784 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:16:56,784 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:16:56,784 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:16:56,784 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:16:56,785 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:16:56,785 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:16:56,785 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:16:56,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:56,786 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:16:56,786 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:16:56,786 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:16:56,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:16:56,787 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:16:56,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:16:56,788 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:16:56,788 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:16:56,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-10-24 19:16:56,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:16:57,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:16:57,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:16:57,017 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:16:57,021 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:16:57,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-24 19:16:58,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:16:58,438 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:16:58,439 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-24 19:16:58,447 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96ed6873e/1cc7c8ac09674a4589d708bf6dffde9b/FLAG24b15ffd2 [2024-10-24 19:16:58,457 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96ed6873e/1cc7c8ac09674a4589d708bf6dffde9b [2024-10-24 19:16:58,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:16:58,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:16:58,461 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:58,461 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:16:58,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:16:58,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:58" (1/1) ... [2024-10-24 19:16:58,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194692aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:58, skipping insertion in model container [2024-10-24 19:16:58,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:58" (1/1) ... [2024-10-24 19:16:58,483 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:16:58,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:58,674 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) [2024-10-24 19:16:58,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f54adbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:58, skipping insertion in model container [2024-10-24 19:16:58,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:58,675 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:16:58,677 INFO L158 Benchmark]: Toolchain (without parser) took 216.39ms. Allocated memory is still 132.1MB. Free memory was 76.6MB in the beginning and 64.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:16:58,677 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 132.1MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:16:58,678 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.26ms. Allocated memory is still 132.1MB. Free memory was 76.4MB in the beginning and 64.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:16:58,679 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 132.1MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.26ms. Allocated memory is still 132.1MB. Free memory was 76.4MB in the beginning and 64.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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-word-symm.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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:17:00,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:17:00,384 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:17:00,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:17:00,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:17:00,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:17:00,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:17:00,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:17:00,419 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:17:00,422 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:17:00,422 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:17:00,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:17:00,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:17:00,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:17:00,423 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:17:00,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:17:00,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:17:00,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:17:00,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:17:00,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:17:00,424 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:17:00,426 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:17:00,426 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:17:00,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:17:00,427 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:17:00,427 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:17:00,427 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:17:00,427 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:17:00,428 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:17:00,428 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:17:00,428 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:17:00,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:17:00,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:17:00,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:17:00,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:17:00,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:17:00,430 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:17:00,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:17:00,430 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:17:00,431 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:17:00,431 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:17:00,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:17:00,431 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:17:00,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:17:00,432 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:17:00,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-10-24 19:17:00,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:17:00,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:17:00,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:17:00,709 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:17:00,710 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:17:00,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-24 19:17:01,981 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:17:02,159 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:17:02,160 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-10-24 19:17:02,171 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cb255c6f/a36d53001e474f1dbafa17e255b27e3e/FLAG2bce057fb [2024-10-24 19:17:02,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cb255c6f/a36d53001e474f1dbafa17e255b27e3e [2024-10-24 19:17:02,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:17:02,190 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:17:02,192 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:17:02,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:17:02,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:17:02,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ccccf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02, skipping insertion in model container [2024-10-24 19:17:02,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:17:02,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:17:02,425 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:17:02,430 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:17:02,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:17:02,470 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:17:02,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:17:02,514 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:17:02,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02 WrapperNode [2024-10-24 19:17:02,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:17:02,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:17:02,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:17:02,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:17:02,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,557 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 119 [2024-10-24 19:17:02,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:17:02,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:17:02,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:17:02,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:17:02,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,571 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,590 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-24 19:17:02,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,615 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,617 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:17:02,618 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:17:02,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:17:02,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:17:02,619 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (1/1) ... [2024-10-24 19:17:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:17:02,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:17:02,652 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) [2024-10-24 19:17:02,655 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 [2024-10-24 19:17:02,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:17:02,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:17:02,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:17:02,685 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:17:02,685 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:17:02,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:17:02,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:17:02,687 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:17:02,783 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:17:02,785 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:17:03,221 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:17:03,221 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:17:03,411 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:17:03,411 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 19:17:03,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:17:03 BoogieIcfgContainer [2024-10-24 19:17:03,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:17:03,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:17:03,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:17:03,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:17:03,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:17:02" (1/3) ... [2024-10-24 19:17:03,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73066bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:17:03, skipping insertion in model container [2024-10-24 19:17:03,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:17:02" (2/3) ... [2024-10-24 19:17:03,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73066bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:17:03, skipping insertion in model container [2024-10-24 19:17:03,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:17:03" (3/3) ... [2024-10-24 19:17:03,419 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-10-24 19:17:03,431 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:17:03,432 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-24 19:17:03,432 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:17:03,500 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:17:03,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-10-24 19:17:03,562 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-10-24 19:17:03,562 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:17:03,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 175 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-10-24 19:17:03,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-10-24 19:17:03,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-10-24 19:17:03,580 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:17:03,587 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;@3f667013, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:17:03,587 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-24 19:17:03,590 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:17:03,590 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:17:03,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:17:03,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:03,591 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:17:03,591 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:03,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 571380, now seen corresponding path program 1 times [2024-10-24 19:17:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:03,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125948874] [2024-10-24 19:17:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:03,607 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 [2024-10-24 19:17:03,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:03,610 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) [2024-10-24 19:17:03,611 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 [2024-10-24 19:17:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:03,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:17:03,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:03,727 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 [2024-10-24 19:17:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:03,743 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:03,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:03,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125948874] [2024-10-24 19:17:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125948874] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:03,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:03,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:17:03,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20510694] [2024-10-24 19:17:03,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:03,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:17:03,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:17:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:17:03,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-24 19:17:03,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 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) [2024-10-24 19:17:03,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:03,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-24 19:17:03,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:04,044 INFO L124 PetriNetUnfolderBase]: 233/554 cut-off events. [2024-10-24 19:17:04,044 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-10-24 19:17:04,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 554 events. 233/554 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2995 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 872. Up to 354 conditions per place. [2024-10-24 19:17:04,051 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 30 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-24 19:17:04,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2024-10-24 19:17:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:17:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:17:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-24 19:17:04,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-10-24 19:17:04,071 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 125 transitions. [2024-10-24 19:17:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2024-10-24 19:17:04,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:17:04,077 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-10-24 19:17:04,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-10-24 19:17:04,084 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-10-24 19:17:04,084 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-10-24 19:17:04,084 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) [2024-10-24 19:17:04,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:04,085 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:17:04,092 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 [2024-10-24 19:17:04,285 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 [2024-10-24 19:17:04,286 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:04,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash 571381, now seen corresponding path program 1 times [2024-10-24 19:17:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:04,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850872877] [2024-10-24 19:17:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:04,289 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 [2024-10-24 19:17:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:04,291 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) [2024-10-24 19:17:04,291 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 [2024-10-24 19:17:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:04,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:17:04,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:04,380 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 8 treesize of output 7 [2024-10-24 19:17:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:04,456 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:04,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850872877] [2024-10-24 19:17:04,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850872877] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:04,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:04,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:17:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366771317] [2024-10-24 19:17:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:04,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:17:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:04,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:17:04,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:17:04,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-24 19:17:04,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-10-24 19:17:04,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:04,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-24 19:17:04,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:04,860 INFO L124 PetriNetUnfolderBase]: 235/560 cut-off events. [2024-10-24 19:17:04,860 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-24 19:17:04,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 560 events. 235/560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3007 event pairs, 138 based on Foata normal form. 0/373 useless extension candidates. Maximal degree in co-relation 905. Up to 363 conditions per place. [2024-10-24 19:17:04,866 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 33 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-10-24 19:17:04,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 220 flow [2024-10-24 19:17:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:17:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:17:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-10-24 19:17:04,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-10-24 19:17:04,872 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 4 states and 162 transitions. [2024-10-24 19:17:04,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 220 flow [2024-10-24 19:17:04,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:04,874 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 178 flow [2024-10-24 19:17:04,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-10-24 19:17:04,875 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2024-10-24 19:17:04,875 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 178 flow [2024-10-24 19:17:04,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-10-24 19:17:04,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:04,875 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:17:04,879 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 [2024-10-24 19:17:05,077 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 [2024-10-24 19:17:05,078 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:05,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 549115947, now seen corresponding path program 1 times [2024-10-24 19:17:05,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:05,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083348114] [2024-10-24 19:17:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:05,079 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 [2024-10-24 19:17:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:05,080 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) [2024-10-24 19:17:05,081 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 [2024-10-24 19:17:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:05,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:17:05,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:05,129 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 8 treesize of output 7 [2024-10-24 19:17:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:05,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:05,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:05,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083348114] [2024-10-24 19:17:05,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083348114] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:05,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:17:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684293814] [2024-10-24 19:17:05,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:05,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:17:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:17:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:17:06,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-24 19:17:06,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 178 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) [2024-10-24 19:17:06,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:06,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-24 19:17:06,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:07,015 INFO L124 PetriNetUnfolderBase]: 241/578 cut-off events. [2024-10-24 19:17:07,016 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-24 19:17:07,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 578 events. 241/578 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3147 event pairs, 138 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 916. Up to 366 conditions per place. [2024-10-24 19:17:07,019 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 33 selfloop transitions, 25 changer transitions 0/83 dead transitions. [2024-10-24 19:17:07,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 372 flow [2024-10-24 19:17:07,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:17:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:17:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 364 transitions. [2024-10-24 19:17:07,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515151515151515 [2024-10-24 19:17:07,022 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 178 flow. Second operand 10 states and 364 transitions. [2024-10-24 19:17:07,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 372 flow [2024-10-24 19:17:07,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:17:07,024 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 340 flow [2024-10-24 19:17:07,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=340, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2024-10-24 19:17:07,025 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-10-24 19:17:07,025 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 340 flow [2024-10-24 19:17:07,025 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) [2024-10-24 19:17:07,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:07,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:07,028 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 [2024-10-24 19:17:07,226 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 [2024-10-24 19:17:07,227 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:07,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:07,227 INFO L85 PathProgramCache]: Analyzing trace with hash 562231825, now seen corresponding path program 1 times [2024-10-24 19:17:07,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:07,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478845185] [2024-10-24 19:17:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:07,228 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 [2024-10-24 19:17:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:07,229 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) [2024-10-24 19:17:07,231 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 [2024-10-24 19:17:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:07,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:17:07,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:07,351 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:07,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:07,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478845185] [2024-10-24 19:17:07,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478845185] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:07,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:07,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:17:07,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548375335] [2024-10-24 19:17:07,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:07,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:17:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:17:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:17:07,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-24 19:17:07,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 83 transitions, 340 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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) [2024-10-24 19:17:07,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:07,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-24 19:17:07,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:07,656 INFO L124 PetriNetUnfolderBase]: 444/1044 cut-off events. [2024-10-24 19:17:07,657 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-10-24 19:17:07,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1912 conditions, 1044 events. 444/1044 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6454 event pairs, 234 based on Foata normal form. 0/717 useless extension candidates. Maximal degree in co-relation 1824. Up to 424 conditions per place. [2024-10-24 19:17:07,662 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 101 selfloop transitions, 5 changer transitions 0/132 dead transitions. [2024-10-24 19:17:07,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 727 flow [2024-10-24 19:17:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:17:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:17:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-10-24 19:17:07,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.693939393939394 [2024-10-24 19:17:07,664 INFO L175 Difference]: Start difference. First operand has 72 places, 83 transitions, 340 flow. Second operand 5 states and 229 transitions. [2024-10-24 19:17:07,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 727 flow [2024-10-24 19:17:07,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 132 transitions, 633 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-24 19:17:07,669 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 301 flow [2024-10-24 19:17:07,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2024-10-24 19:17:07,669 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-10-24 19:17:07,670 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 301 flow [2024-10-24 19:17:07,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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) [2024-10-24 19:17:07,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:07,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:07,686 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 [2024-10-24 19:17:07,871 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 [2024-10-24 19:17:07,871 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:07,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -849472993, now seen corresponding path program 1 times [2024-10-24 19:17:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:07,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320842351] [2024-10-24 19:17:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:07,873 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 [2024-10-24 19:17:07,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:07,877 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) [2024-10-24 19:17:07,883 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 [2024-10-24 19:17:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:07,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:17:07,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:07,935 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 [2024-10-24 19:17:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:07,952 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:07,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320842351] [2024-10-24 19:17:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320842351] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:07,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:07,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:17:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865313784] [2024-10-24 19:17:07,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:07,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:17:07,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:17:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:17:08,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-10-24 19:17:08,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 301 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) [2024-10-24 19:17:08,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-10-24 19:17:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:08,216 INFO L124 PetriNetUnfolderBase]: 540/1197 cut-off events. [2024-10-24 19:17:08,216 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-10-24 19:17:08,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2304 conditions, 1197 events. 540/1197 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7228 event pairs, 356 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 2227. Up to 838 conditions per place. [2024-10-24 19:17:08,221 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 55 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-10-24 19:17:08,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 415 flow [2024-10-24 19:17:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:17:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:17:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-10-24 19:17:08,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-10-24 19:17:08,223 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 301 flow. Second operand 4 states and 131 transitions. [2024-10-24 19:17:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 415 flow [2024-10-24 19:17:08,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 411 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:17:08,226 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 301 flow [2024-10-24 19:17:08,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-10-24 19:17:08,226 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-10-24 19:17:08,227 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 301 flow [2024-10-24 19:17:08,227 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) [2024-10-24 19:17:08,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:08,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:08,231 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 [2024-10-24 19:17:08,427 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 [2024-10-24 19:17:08,428 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:08,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1756722277, now seen corresponding path program 1 times [2024-10-24 19:17:08,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:08,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131514977] [2024-10-24 19:17:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:08,429 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 [2024-10-24 19:17:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:08,430 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) [2024-10-24 19:17:08,431 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 [2024-10-24 19:17:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:08,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:17:08,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:08,527 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:08,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131514977] [2024-10-24 19:17:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131514977] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:08,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:08,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:17:08,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656207349] [2024-10-24 19:17:08,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:08,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:17:08,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:17:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:17:08,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-24 19:17:08,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 301 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-10-24 19:17:08,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:08,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-24 19:17:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:08,844 INFO L124 PetriNetUnfolderBase]: 786/1783 cut-off events. [2024-10-24 19:17:08,844 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2024-10-24 19:17:08,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3393 conditions, 1783 events. 786/1783 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12010 event pairs, 426 based on Foata normal form. 16/1392 useless extension candidates. Maximal degree in co-relation 3314. Up to 710 conditions per place. [2024-10-24 19:17:08,852 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 84 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-10-24 19:17:08,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 580 flow [2024-10-24 19:17:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:17:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:17:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-10-24 19:17:08,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2024-10-24 19:17:08,853 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 301 flow. Second operand 5 states and 226 transitions. [2024-10-24 19:17:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 580 flow [2024-10-24 19:17:08,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 117 transitions, 565 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:17:08,856 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 347 flow [2024-10-24 19:17:08,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-10-24 19:17:08,857 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 13 predicate places. [2024-10-24 19:17:08,857 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 347 flow [2024-10-24 19:17:08,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-10-24 19:17:08,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:08,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:08,865 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 [2024-10-24 19:17:09,058 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 [2024-10-24 19:17:09,059 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:09,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -849472992, now seen corresponding path program 1 times [2024-10-24 19:17:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143416851] [2024-10-24 19:17:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:09,060 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 [2024-10-24 19:17:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:09,063 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) [2024-10-24 19:17:09,064 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 [2024-10-24 19:17:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:09,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:17:09,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:09,133 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 8 treesize of output 7 [2024-10-24 19:17:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:09,274 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:09,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:09,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143416851] [2024-10-24 19:17:09,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143416851] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:09,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:09,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:17:09,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371588282] [2024-10-24 19:17:09,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:09,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:17:09,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:09,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:17:09,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:17:09,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-10-24 19:17:09,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 347 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) [2024-10-24 19:17:09,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:09,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-10-24 19:17:09,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:09,996 INFO L124 PetriNetUnfolderBase]: 1964/3862 cut-off events. [2024-10-24 19:17:09,997 INFO L125 PetriNetUnfolderBase]: For 2019/2019 co-relation queries the response was YES. [2024-10-24 19:17:10,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8128 conditions, 3862 events. 1964/3862 cut-off events. For 2019/2019 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26139 event pairs, 880 based on Foata normal form. 0/2995 useless extension candidates. Maximal degree in co-relation 8047. Up to 2058 conditions per place. [2024-10-24 19:17:10,013 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 98 selfloop transitions, 17 changer transitions 0/132 dead transitions. [2024-10-24 19:17:10,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 769 flow [2024-10-24 19:17:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:17:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:17:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2024-10-24 19:17:10,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-24 19:17:10,016 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 347 flow. Second operand 6 states and 231 transitions. [2024-10-24 19:17:10,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 769 flow [2024-10-24 19:17:10,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 132 transitions, 763 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:17:10,021 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 411 flow [2024-10-24 19:17:10,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-10-24 19:17:10,022 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2024-10-24 19:17:10,022 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 411 flow [2024-10-24 19:17:10,023 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) [2024-10-24 19:17:10,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:10,023 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:17:10,030 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 [2024-10-24 19:17:10,224 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 [2024-10-24 19:17:10,224 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:10,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1579907021, now seen corresponding path program 2 times [2024-10-24 19:17:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:10,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34468047] [2024-10-24 19:17:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:17:10,225 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 [2024-10-24 19:17:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:10,228 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) [2024-10-24 19:17:10,230 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 [2024-10-24 19:17:10,275 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:17:10,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:17:10,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 19:17:10,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:10,290 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 8 treesize of output 7 [2024-10-24 19:17:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:10,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:10,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:10,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34468047] [2024-10-24 19:17:10,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34468047] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:10,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:10,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:17:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252983927] [2024-10-24 19:17:10,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:10,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:17:10,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:17:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:17:12,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-24 19:17:12,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 411 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2024-10-24 19:17:12,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:12,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-24 19:17:12,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:20,308 INFO L124 PetriNetUnfolderBase]: 1282/3050 cut-off events. [2024-10-24 19:17:20,308 INFO L125 PetriNetUnfolderBase]: For 1581/1583 co-relation queries the response was YES. [2024-10-24 19:17:20,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6759 conditions, 3050 events. 1282/3050 cut-off events. For 1581/1583 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 23465 event pairs, 791 based on Foata normal form. 18/2610 useless extension candidates. Maximal degree in co-relation 6454. Up to 1950 conditions per place. [2024-10-24 19:17:20,320 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 43 selfloop transitions, 61 changer transitions 0/127 dead transitions. [2024-10-24 19:17:20,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 127 transitions, 823 flow [2024-10-24 19:17:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:17:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:17:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 766 transitions. [2024-10-24 19:17:20,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5275482093663911 [2024-10-24 19:17:20,322 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 411 flow. Second operand 22 states and 766 transitions. [2024-10-24 19:17:20,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 127 transitions, 823 flow [2024-10-24 19:17:20,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 127 transitions, 790 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:20,327 INFO L231 Difference]: Finished difference. Result has 106 places, 127 transitions, 762 flow [2024-10-24 19:17:20,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=762, PETRI_PLACES=106, PETRI_TRANSITIONS=127} [2024-10-24 19:17:20,328 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 44 predicate places. [2024-10-24 19:17:20,328 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 127 transitions, 762 flow [2024-10-24 19:17:20,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2024-10-24 19:17:20,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:20,328 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:20,333 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 [2024-10-24 19:17:20,529 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 [2024-10-24 19:17:20,529 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:20,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash -563858424, now seen corresponding path program 1 times [2024-10-24 19:17:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:20,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913447150] [2024-10-24 19:17:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:20,530 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 [2024-10-24 19:17:20,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:20,531 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) [2024-10-24 19:17:20,533 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 [2024-10-24 19:17:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:20,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:17:20,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:20,628 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:20,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913447150] [2024-10-24 19:17:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913447150] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:20,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:20,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:17:20,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779918778] [2024-10-24 19:17:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:20,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:17:20,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:17:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:17:20,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-24 19:17:20,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 127 transitions, 762 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-10-24 19:17:20,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:20,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-24 19:17:20,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:20,923 INFO L124 PetriNetUnfolderBase]: 1083/2351 cut-off events. [2024-10-24 19:17:20,924 INFO L125 PetriNetUnfolderBase]: For 1337/1345 co-relation queries the response was YES. [2024-10-24 19:17:20,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5557 conditions, 2351 events. 1083/2351 cut-off events. For 1337/1345 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15220 event pairs, 629 based on Foata normal form. 26/2090 useless extension candidates. Maximal degree in co-relation 5430. Up to 1285 conditions per place. [2024-10-24 19:17:20,935 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 159 selfloop transitions, 5 changer transitions 0/187 dead transitions. [2024-10-24 19:17:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1441 flow [2024-10-24 19:17:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:17:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:17:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-10-24 19:17:20,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-10-24 19:17:20,936 INFO L175 Difference]: Start difference. First operand has 106 places, 127 transitions, 762 flow. Second operand 5 states and 222 transitions. [2024-10-24 19:17:20,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1441 flow [2024-10-24 19:17:20,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1207 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-10-24 19:17:20,943 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 637 flow [2024-10-24 19:17:20,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=637, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-10-24 19:17:20,945 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 41 predicate places. [2024-10-24 19:17:20,945 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 637 flow [2024-10-24 19:17:20,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-10-24 19:17:20,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:20,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:20,948 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 [2024-10-24 19:17:21,145 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 [2024-10-24 19:17:21,146 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:21,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1883221570, now seen corresponding path program 1 times [2024-10-24 19:17:21,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919064051] [2024-10-24 19:17:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:21,147 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 [2024-10-24 19:17:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:21,149 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) [2024-10-24 19:17:21,150 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 (11)] Waiting until timeout for monitored process [2024-10-24 19:17:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:21,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:17:21,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:21,222 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 [2024-10-24 19:17:21,247 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:17:21,247 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 [2024-10-24 19:17:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:17:21,264 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:21,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:21,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919064051] [2024-10-24 19:17:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919064051] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:21,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:21,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:17:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880835542] [2024-10-24 19:17:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:21,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:17:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:17:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:17:21,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-10-24 19:17:21,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 637 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:17:21,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:21,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-10-24 19:17:21,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:21,545 INFO L124 PetriNetUnfolderBase]: 1163/2351 cut-off events. [2024-10-24 19:17:21,545 INFO L125 PetriNetUnfolderBase]: For 1629/1631 co-relation queries the response was YES. [2024-10-24 19:17:21,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 2351 events. 1163/2351 cut-off events. For 1629/1631 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14285 event pairs, 774 based on Foata normal form. 0/2300 useless extension candidates. Maximal degree in co-relation 5687. Up to 1806 conditions per place. [2024-10-24 19:17:21,559 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 84 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2024-10-24 19:17:21,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 125 transitions, 843 flow [2024-10-24 19:17:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:17:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:17:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-10-24 19:17:21,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-10-24 19:17:21,561 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 637 flow. Second operand 5 states and 154 transitions. [2024-10-24 19:17:21,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 125 transitions, 843 flow [2024-10-24 19:17:21,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 125 transitions, 838 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:21,567 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 670 flow [2024-10-24 19:17:21,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=670, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-10-24 19:17:21,569 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 39 predicate places. [2024-10-24 19:17:21,569 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 670 flow [2024-10-24 19:17:21,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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) [2024-10-24 19:17:21,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:21,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:21,573 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 (11)] Forceful destruction successful, exit code 0 [2024-10-24 19:17:21,769 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 [2024-10-24 19:17:21,770 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:21,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1883221571, now seen corresponding path program 1 times [2024-10-24 19:17:21,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:21,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59351747] [2024-10-24 19:17:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:21,770 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 [2024-10-24 19:17:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:21,771 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) [2024-10-24 19:17:21,772 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 [2024-10-24 19:17:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:21,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:17:21,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:21,864 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 [2024-10-24 19:17:21,873 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 8 treesize of output 7 [2024-10-24 19:17:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:21,970 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 16 treesize of output 11 [2024-10-24 19:17:21,986 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:17:21,987 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 [2024-10-24 19:17:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:22,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:22,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59351747] [2024-10-24 19:17:22,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59351747] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:22,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:22,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:17:22,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257458353] [2024-10-24 19:17:22,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:22,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:17:22,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:17:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:17:23,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:17:23,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 670 flow. Second operand has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 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) [2024-10-24 19:17:23,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:23,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:17:23,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:25,691 INFO L124 PetriNetUnfolderBase]: 3362/6498 cut-off events. [2024-10-24 19:17:25,691 INFO L125 PetriNetUnfolderBase]: For 3622/3632 co-relation queries the response was YES. [2024-10-24 19:17:25,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15913 conditions, 6498 events. 3362/6498 cut-off events. For 3622/3632 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 47263 event pairs, 1349 based on Foata normal form. 6/6028 useless extension candidates. Maximal degree in co-relation 15732. Up to 1516 conditions per place. [2024-10-24 19:17:25,723 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 202 selfloop transitions, 116 changer transitions 0/333 dead transitions. [2024-10-24 19:17:25,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 333 transitions, 2240 flow [2024-10-24 19:17:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 19:17:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 19:17:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 763 transitions. [2024-10-24 19:17:25,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.502635046113307 [2024-10-24 19:17:25,726 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 670 flow. Second operand 23 states and 763 transitions. [2024-10-24 19:17:25,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 333 transitions, 2240 flow [2024-10-24 19:17:25,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 333 transitions, 2183 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:17:25,744 INFO L231 Difference]: Finished difference. Result has 121 places, 189 transitions, 1244 flow [2024-10-24 19:17:25,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1244, PETRI_PLACES=121, PETRI_TRANSITIONS=189} [2024-10-24 19:17:25,745 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 59 predicate places. [2024-10-24 19:17:25,745 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 189 transitions, 1244 flow [2024-10-24 19:17:25,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 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) [2024-10-24 19:17:25,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:25,745 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:25,749 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 [2024-10-24 19:17:25,946 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 [2024-10-24 19:17:25,946 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:25,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash 23445054, now seen corresponding path program 1 times [2024-10-24 19:17:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:25,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160383335] [2024-10-24 19:17:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:25,947 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 [2024-10-24 19:17:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:25,949 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) [2024-10-24 19:17:25,950 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 [2024-10-24 19:17:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:26,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:17:26,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:26,061 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:26,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160383335] [2024-10-24 19:17:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160383335] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:26,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:17:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538212675] [2024-10-24 19:17:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:26,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:17:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:17:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:17:26,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-24 19:17:26,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 189 transitions, 1244 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 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) [2024-10-24 19:17:26,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:26,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-24 19:17:26,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:26,592 INFO L124 PetriNetUnfolderBase]: 2594/5318 cut-off events. [2024-10-24 19:17:26,593 INFO L125 PetriNetUnfolderBase]: For 5092/5108 co-relation queries the response was YES. [2024-10-24 19:17:26,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13919 conditions, 5318 events. 2594/5318 cut-off events. For 5092/5108 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 38292 event pairs, 1470 based on Foata normal form. 39/5164 useless extension candidates. Maximal degree in co-relation 13721. Up to 3166 conditions per place. [2024-10-24 19:17:26,620 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 179 selfloop transitions, 21 changer transitions 0/222 dead transitions. [2024-10-24 19:17:26,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 222 transitions, 1807 flow [2024-10-24 19:17:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:17:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:17:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-10-24 19:17:26,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-10-24 19:17:26,622 INFO L175 Difference]: Start difference. First operand has 121 places, 189 transitions, 1244 flow. Second operand 5 states and 219 transitions. [2024-10-24 19:17:26,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 222 transitions, 1807 flow [2024-10-24 19:17:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 222 transitions, 1761 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:26,653 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 1297 flow [2024-10-24 19:17:26,653 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1297, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-10-24 19:17:26,654 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 63 predicate places. [2024-10-24 19:17:26,654 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 1297 flow [2024-10-24 19:17:26,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 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) [2024-10-24 19:17:26,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:26,654 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:26,659 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 (13)] Ended with exit code 0 [2024-10-24 19:17:26,855 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 [2024-10-24 19:17:26,855 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:26,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1749672912, now seen corresponding path program 1 times [2024-10-24 19:17:26,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182379056] [2024-10-24 19:17:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:26,857 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 [2024-10-24 19:17:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:26,859 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) [2024-10-24 19:17:26,860 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 [2024-10-24 19:17:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:26,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:17:26,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:26,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:27,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-24 19:17:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:27,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182379056] [2024-10-24 19:17:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182379056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:27,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:17:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882319691] [2024-10-24 19:17:27,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:27,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:17:27,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:17:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:17:27,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-10-24 19:17:27,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 1297 flow. Second operand has 10 states, 10 states have (on average 30.9) internal successors, (309), 10 states have internal predecessors, (309), 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) [2024-10-24 19:17:27,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:27,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-10-24 19:17:27,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:28,808 INFO L124 PetriNetUnfolderBase]: 3123/5916 cut-off events. [2024-10-24 19:17:28,808 INFO L125 PetriNetUnfolderBase]: For 6080/6108 co-relation queries the response was YES. [2024-10-24 19:17:28,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16188 conditions, 5916 events. 3123/5916 cut-off events. For 6080/6108 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 40215 event pairs, 1176 based on Foata normal form. 240/5930 useless extension candidates. Maximal degree in co-relation 15987. Up to 2061 conditions per place. [2024-10-24 19:17:28,835 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 172 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-10-24 19:17:28,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 250 transitions, 1975 flow [2024-10-24 19:17:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:17:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:17:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 331 transitions. [2024-10-24 19:17:28,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6268939393939394 [2024-10-24 19:17:28,838 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 1297 flow. Second operand 8 states and 331 transitions. [2024-10-24 19:17:28,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 250 transitions, 1975 flow [2024-10-24 19:17:28,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 250 transitions, 1944 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:28,858 INFO L231 Difference]: Finished difference. Result has 131 places, 199 transitions, 1476 flow [2024-10-24 19:17:28,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1476, PETRI_PLACES=131, PETRI_TRANSITIONS=199} [2024-10-24 19:17:28,859 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 69 predicate places. [2024-10-24 19:17:28,859 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 199 transitions, 1476 flow [2024-10-24 19:17:28,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.9) internal successors, (309), 10 states have internal predecessors, (309), 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) [2024-10-24 19:17:28,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:28,860 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:28,866 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 (14)] Ended with exit code 0 [2024-10-24 19:17:29,060 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 [2024-10-24 19:17:29,061 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:29,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1743698377, now seen corresponding path program 1 times [2024-10-24 19:17:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:29,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811397620] [2024-10-24 19:17:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:29,062 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 [2024-10-24 19:17:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:29,063 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) [2024-10-24 19:17:29,064 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 [2024-10-24 19:17:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:29,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:17:29,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:29,153 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 [2024-10-24 19:17:29,162 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 8 treesize of output 7 [2024-10-24 19:17:29,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:29,278 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 16 treesize of output 11 [2024-10-24 19:17:29,299 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:17:29,299 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 [2024-10-24 19:17:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:29,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:29,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:29,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811397620] [2024-10-24 19:17:29,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811397620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:29,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:29,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:17:29,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093580017] [2024-10-24 19:17:29,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:29,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:17:29,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:17:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:17:31,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-10-24 19:17:31,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 199 transitions, 1476 flow. Second operand has 12 states, 12 states have (on average 27.166666666666668) internal successors, (326), 12 states have internal predecessors, (326), 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) [2024-10-24 19:17:31,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:31,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-10-24 19:17:31,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:33,698 INFO L124 PetriNetUnfolderBase]: 3428/6385 cut-off events. [2024-10-24 19:17:33,698 INFO L125 PetriNetUnfolderBase]: For 10315/10353 co-relation queries the response was YES. [2024-10-24 19:17:33,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18780 conditions, 6385 events. 3428/6385 cut-off events. For 10315/10353 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 42026 event pairs, 1340 based on Foata normal form. 16/6167 useless extension candidates. Maximal degree in co-relation 18568. Up to 1734 conditions per place. [2024-10-24 19:17:33,736 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 209 selfloop transitions, 122 changer transitions 0/351 dead transitions. [2024-10-24 19:17:33,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 351 transitions, 2954 flow [2024-10-24 19:17:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 19:17:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 19:17:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 778 transitions. [2024-10-24 19:17:33,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125164690382081 [2024-10-24 19:17:33,740 INFO L175 Difference]: Start difference. First operand has 131 places, 199 transitions, 1476 flow. Second operand 23 states and 778 transitions. [2024-10-24 19:17:33,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 351 transitions, 2954 flow [2024-10-24 19:17:33,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 351 transitions, 2881 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-10-24 19:17:33,769 INFO L231 Difference]: Finished difference. Result has 152 places, 220 transitions, 1841 flow [2024-10-24 19:17:33,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1841, PETRI_PLACES=152, PETRI_TRANSITIONS=220} [2024-10-24 19:17:33,770 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 90 predicate places. [2024-10-24 19:17:33,770 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 220 transitions, 1841 flow [2024-10-24 19:17:33,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.166666666666668) internal successors, (326), 12 states have internal predecessors, (326), 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) [2024-10-24 19:17:33,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:33,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:33,775 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 (15)] Ended with exit code 0 [2024-10-24 19:17:33,971 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 [2024-10-24 19:17:33,972 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:33,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:33,973 INFO L85 PathProgramCache]: Analyzing trace with hash -782086199, now seen corresponding path program 1 times [2024-10-24 19:17:33,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255591571] [2024-10-24 19:17:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:33,973 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 [2024-10-24 19:17:33,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:33,974 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) [2024-10-24 19:17:33,975 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 (16)] Waiting until timeout for monitored process [2024-10-24 19:17:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:34,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:17:34,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:34,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:34,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255591571] [2024-10-24 19:17:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255591571] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:34,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:17:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036673744] [2024-10-24 19:17:34,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:34,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:17:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:17:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:17:34,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-24 19:17:34,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 220 transitions, 1841 flow. Second operand has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 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) [2024-10-24 19:17:34,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:34,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-24 19:17:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:35,501 INFO L124 PetriNetUnfolderBase]: 3028/5785 cut-off events. [2024-10-24 19:17:35,501 INFO L125 PetriNetUnfolderBase]: For 10875/10899 co-relation queries the response was YES. [2024-10-24 19:17:35,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 5785 events. 3028/5785 cut-off events. For 10875/10899 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 38485 event pairs, 1576 based on Foata normal form. 30/5667 useless extension candidates. Maximal degree in co-relation 18289. Up to 3059 conditions per place. [2024-10-24 19:17:35,526 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 242 selfloop transitions, 75 changer transitions 0/343 dead transitions. [2024-10-24 19:17:35,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 343 transitions, 3211 flow [2024-10-24 19:17:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:17:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:17:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 467 transitions. [2024-10-24 19:17:35,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6432506887052342 [2024-10-24 19:17:35,528 INFO L175 Difference]: Start difference. First operand has 152 places, 220 transitions, 1841 flow. Second operand 11 states and 467 transitions. [2024-10-24 19:17:35,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 343 transitions, 3211 flow [2024-10-24 19:17:35,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 343 transitions, 3042 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-10-24 19:17:35,554 INFO L231 Difference]: Finished difference. Result has 149 places, 239 transitions, 2171 flow [2024-10-24 19:17:35,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2171, PETRI_PLACES=149, PETRI_TRANSITIONS=239} [2024-10-24 19:17:35,555 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 87 predicate places. [2024-10-24 19:17:35,555 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 239 transitions, 2171 flow [2024-10-24 19:17:35,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.857142857142854) internal successors, (460), 14 states have internal predecessors, (460), 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) [2024-10-24 19:17:35,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:35,555 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:35,559 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 [2024-10-24 19:17:35,756 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 [2024-10-24 19:17:35,756 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:35,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1645123787, now seen corresponding path program 1 times [2024-10-24 19:17:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:35,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723295044] [2024-10-24 19:17:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:35,757 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 [2024-10-24 19:17:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:35,759 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) [2024-10-24 19:17:35,760 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 [2024-10-24 19:17:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:35,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:17:35,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:35,935 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:35,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723295044] [2024-10-24 19:17:35,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723295044] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:35,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:35,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:17:35,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993704452] [2024-10-24 19:17:35,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:35,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:17:35,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:17:35,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:17:35,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-24 19:17:35,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 239 transitions, 2171 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-10-24 19:17:35,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:35,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-24 19:17:35,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:36,734 INFO L124 PetriNetUnfolderBase]: 3182/6366 cut-off events. [2024-10-24 19:17:36,734 INFO L125 PetriNetUnfolderBase]: For 12387/12401 co-relation queries the response was YES. [2024-10-24 19:17:36,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19923 conditions, 6366 events. 3182/6366 cut-off events. For 12387/12401 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 46211 event pairs, 1723 based on Foata normal form. 48/6252 useless extension candidates. Maximal degree in co-relation 19673. Up to 4163 conditions per place. [2024-10-24 19:17:36,771 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 241 selfloop transitions, 1 changer transitions 9/278 dead transitions. [2024-10-24 19:17:36,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 278 transitions, 2912 flow [2024-10-24 19:17:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:17:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:17:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-10-24 19:17:36,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-10-24 19:17:36,773 INFO L175 Difference]: Start difference. First operand has 149 places, 239 transitions, 2171 flow. Second operand 4 states and 182 transitions. [2024-10-24 19:17:36,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 278 transitions, 2912 flow [2024-10-24 19:17:36,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 278 transitions, 2893 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-24 19:17:36,807 INFO L231 Difference]: Finished difference. Result has 150 places, 239 transitions, 2175 flow [2024-10-24 19:17:36,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2175, PETRI_PLACES=150, PETRI_TRANSITIONS=239} [2024-10-24 19:17:36,807 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 88 predicate places. [2024-10-24 19:17:36,807 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 239 transitions, 2175 flow [2024-10-24 19:17:36,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-10-24 19:17:36,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:36,808 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:36,811 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 (17)] Forceful destruction successful, exit code 0 [2024-10-24 19:17:37,008 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 [2024-10-24 19:17:37,008 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:37,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1076110243, now seen corresponding path program 2 times [2024-10-24 19:17:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:37,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167722317] [2024-10-24 19:17:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:17:37,009 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 [2024-10-24 19:17:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:37,010 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) [2024-10-24 19:17:37,011 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 [2024-10-24 19:17:37,054 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:17:37,054 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:17:37,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:17:37,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:17:37,161 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:37,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167722317] [2024-10-24 19:17:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167722317] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:37,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:37,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:17:37,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333961208] [2024-10-24 19:17:37,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:37,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:17:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:17:37,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:17:37,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-24 19:17:37,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 239 transitions, 2175 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-10-24 19:17:37,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:37,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-24 19:17:37,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:37,975 INFO L124 PetriNetUnfolderBase]: 3412/6815 cut-off events. [2024-10-24 19:17:37,975 INFO L125 PetriNetUnfolderBase]: For 13380/13448 co-relation queries the response was YES. [2024-10-24 19:17:37,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21442 conditions, 6815 events. 3412/6815 cut-off events. For 13380/13448 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 50213 event pairs, 2153 based on Foata normal form. 50/6641 useless extension candidates. Maximal degree in co-relation 21308. Up to 4895 conditions per place. [2024-10-24 19:17:38,010 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 239 selfloop transitions, 1 changer transitions 7/274 dead transitions. [2024-10-24 19:17:38,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 274 transitions, 2891 flow [2024-10-24 19:17:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:17:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:17:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-10-24 19:17:38,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-10-24 19:17:38,012 INFO L175 Difference]: Start difference. First operand has 150 places, 239 transitions, 2175 flow. Second operand 4 states and 180 transitions. [2024-10-24 19:17:38,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 274 transitions, 2891 flow [2024-10-24 19:17:38,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 274 transitions, 2885 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:38,042 INFO L231 Difference]: Finished difference. Result has 152 places, 239 transitions, 2195 flow [2024-10-24 19:17:38,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2195, PETRI_PLACES=152, PETRI_TRANSITIONS=239} [2024-10-24 19:17:38,043 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 90 predicate places. [2024-10-24 19:17:38,043 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 239 transitions, 2195 flow [2024-10-24 19:17:38,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-10-24 19:17:38,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:38,043 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:38,046 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 (18)] Ended with exit code 0 [2024-10-24 19:17:38,244 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 [2024-10-24 19:17:38,244 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:38,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:38,244 INFO L85 PathProgramCache]: Analyzing trace with hash -869493663, now seen corresponding path program 2 times [2024-10-24 19:17:38,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:38,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642870811] [2024-10-24 19:17:38,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:17:38,245 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 [2024-10-24 19:17:38,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:38,250 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) [2024-10-24 19:17:38,251 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 [2024-10-24 19:17:38,298 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:17:38,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:17:38,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:17:38,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:38,307 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 [2024-10-24 19:17:38,311 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 8 treesize of output 7 [2024-10-24 19:17:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:38,388 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 16 treesize of output 11 [2024-10-24 19:17:38,397 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:17:38,397 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 [2024-10-24 19:17:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-24 19:17:38,486 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:38,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:38,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642870811] [2024-10-24 19:17:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642870811] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:38,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:38,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:17:38,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275677754] [2024-10-24 19:17:38,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:38,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:17:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:17:38,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:17:38,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:17:38,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 239 transitions, 2195 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-10-24 19:17:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:17:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:39,783 INFO L124 PetriNetUnfolderBase]: 4880/8982 cut-off events. [2024-10-24 19:17:39,784 INFO L125 PetriNetUnfolderBase]: For 19126/19132 co-relation queries the response was YES. [2024-10-24 19:17:39,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29486 conditions, 8982 events. 4880/8982 cut-off events. For 19126/19132 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 63217 event pairs, 2370 based on Foata normal form. 34/8952 useless extension candidates. Maximal degree in co-relation 29351. Up to 5270 conditions per place. [2024-10-24 19:17:39,825 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 271 selfloop transitions, 42 changer transitions 0/328 dead transitions. [2024-10-24 19:17:39,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 328 transitions, 3475 flow [2024-10-24 19:17:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:17:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:17:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-10-24 19:17:39,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-10-24 19:17:39,827 INFO L175 Difference]: Start difference. First operand has 152 places, 239 transitions, 2195 flow. Second operand 6 states and 219 transitions. [2024-10-24 19:17:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 328 transitions, 3475 flow [2024-10-24 19:17:39,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 328 transitions, 3470 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:39,870 INFO L231 Difference]: Finished difference. Result has 156 places, 249 transitions, 2401 flow [2024-10-24 19:17:39,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2401, PETRI_PLACES=156, PETRI_TRANSITIONS=249} [2024-10-24 19:17:39,871 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 94 predicate places. [2024-10-24 19:17:39,871 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 249 transitions, 2401 flow [2024-10-24 19:17:39,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 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) [2024-10-24 19:17:39,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:39,871 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:39,875 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 [2024-10-24 19:17:40,071 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 [2024-10-24 19:17:40,072 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:40,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1072478035, now seen corresponding path program 2 times [2024-10-24 19:17:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:40,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330136566] [2024-10-24 19:17:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:17:40,072 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 [2024-10-24 19:17:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:40,073 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) [2024-10-24 19:17:40,075 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 [2024-10-24 19:17:40,137 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:17:40,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:17:40,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:17:40,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:40,145 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 [2024-10-24 19:17:40,150 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 8 treesize of output 1 [2024-10-24 19:17:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:40,196 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 [2024-10-24 19:17:40,203 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:17:40,203 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 [2024-10-24 19:17:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:40,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:43,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:43,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330136566] [2024-10-24 19:17:43,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330136566] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:43,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:17:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139673861] [2024-10-24 19:17:43,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:43,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:17:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:17:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:17:44,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:17:44,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 249 transitions, 2401 flow. Second operand has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 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) [2024-10-24 19:17:44,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:44,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:17:44,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:47,339 INFO L124 PetriNetUnfolderBase]: 5315/9879 cut-off events. [2024-10-24 19:17:47,339 INFO L125 PetriNetUnfolderBase]: For 26479/26603 co-relation queries the response was YES. [2024-10-24 19:17:47,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34427 conditions, 9879 events. 5315/9879 cut-off events. For 26479/26603 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 70223 event pairs, 2126 based on Foata normal form. 98/9739 useless extension candidates. Maximal degree in co-relation 34166. Up to 2557 conditions per place. [2024-10-24 19:17:47,418 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 289 selfloop transitions, 79 changer transitions 0/393 dead transitions. [2024-10-24 19:17:47,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 393 transitions, 4061 flow [2024-10-24 19:17:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 19:17:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-24 19:17:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 463 transitions. [2024-10-24 19:17:47,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5396270396270396 [2024-10-24 19:17:47,420 INFO L175 Difference]: Start difference. First operand has 156 places, 249 transitions, 2401 flow. Second operand 13 states and 463 transitions. [2024-10-24 19:17:47,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 393 transitions, 4061 flow [2024-10-24 19:17:47,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 393 transitions, 4011 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-24 19:17:47,494 INFO L231 Difference]: Finished difference. Result has 168 places, 269 transitions, 2765 flow [2024-10-24 19:17:47,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2765, PETRI_PLACES=168, PETRI_TRANSITIONS=269} [2024-10-24 19:17:47,495 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 106 predicate places. [2024-10-24 19:17:47,495 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 269 transitions, 2765 flow [2024-10-24 19:17:47,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.142857142857142) internal successors, (366), 14 states have internal predecessors, (366), 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) [2024-10-24 19:17:47,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:47,496 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:47,499 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 (20)] Forceful destruction successful, exit code 0 [2024-10-24 19:17:47,696 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 [2024-10-24 19:17:47,696 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:47,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1111647672, now seen corresponding path program 1 times [2024-10-24 19:17:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:47,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52588913] [2024-10-24 19:17:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:47,697 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 [2024-10-24 19:17:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:47,698 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) [2024-10-24 19:17:47,699 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 [2024-10-24 19:17:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:47,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:17:47,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:47,779 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 8 treesize of output 7 [2024-10-24 19:17:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:17:47,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:17:48,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:48,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52588913] [2024-10-24 19:17:48,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52588913] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:48,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:48,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:17:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144992645] [2024-10-24 19:17:48,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:48,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:17:48,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:17:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:17:49,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-10-24 19:17:49,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 269 transitions, 2765 flow. Second operand has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 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) [2024-10-24 19:17:49,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:49,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-10-24 19:17:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:52,359 INFO L124 PetriNetUnfolderBase]: 10461/18110 cut-off events. [2024-10-24 19:17:52,359 INFO L125 PetriNetUnfolderBase]: For 64111/64245 co-relation queries the response was YES. [2024-10-24 19:17:52,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65147 conditions, 18110 events. 10461/18110 cut-off events. For 64111/64245 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 127437 event pairs, 2409 based on Foata normal form. 844/18808 useless extension candidates. Maximal degree in co-relation 64884. Up to 5699 conditions per place. [2024-10-24 19:17:52,611 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 491 selfloop transitions, 93 changer transitions 0/609 dead transitions. [2024-10-24 19:17:52,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 609 transitions, 7425 flow [2024-10-24 19:17:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:17:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:17:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 485 transitions. [2024-10-24 19:17:52,614 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6123737373737373 [2024-10-24 19:17:52,614 INFO L175 Difference]: Start difference. First operand has 168 places, 269 transitions, 2765 flow. Second operand 12 states and 485 transitions. [2024-10-24 19:17:52,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 609 transitions, 7425 flow [2024-10-24 19:17:52,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 609 transitions, 7312 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:52,728 INFO L231 Difference]: Finished difference. Result has 180 places, 288 transitions, 3118 flow [2024-10-24 19:17:52,728 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3118, PETRI_PLACES=180, PETRI_TRANSITIONS=288} [2024-10-24 19:17:52,728 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 118 predicate places. [2024-10-24 19:17:52,728 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 288 transitions, 3118 flow [2024-10-24 19:17:52,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 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) [2024-10-24 19:17:52,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:52,729 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:52,732 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 (21)] Forceful destruction successful, exit code 0 [2024-10-24 19:17:52,929 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 [2024-10-24 19:17:52,929 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:52,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1112918752, now seen corresponding path program 1 times [2024-10-24 19:17:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:52,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651532314] [2024-10-24 19:17:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:52,930 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 [2024-10-24 19:17:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:52,931 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) [2024-10-24 19:17:52,933 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 [2024-10-24 19:17:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:53,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:17:53,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:53,011 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 8 treesize of output 7 [2024-10-24 19:17:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:17:53,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:17:53,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651532314] [2024-10-24 19:17:53,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651532314] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:53,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:53,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:17:53,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947564672] [2024-10-24 19:17:53,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:53,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:17:53,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:53,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:17:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:17:54,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-10-24 19:17:54,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 288 transitions, 3118 flow. Second operand has 14 states, 14 states have (on average 27.928571428571427) internal successors, (391), 14 states have internal predecessors, (391), 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) [2024-10-24 19:17:54,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:54,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-10-24 19:17:54,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:58,732 INFO L124 PetriNetUnfolderBase]: 13901/24084 cut-off events. [2024-10-24 19:17:58,733 INFO L125 PetriNetUnfolderBase]: For 99117/99375 co-relation queries the response was YES. [2024-10-24 19:17:58,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94051 conditions, 24084 events. 13901/24084 cut-off events. For 99117/99375 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 175911 event pairs, 3463 based on Foata normal form. 426/24106 useless extension candidates. Maximal degree in co-relation 93779. Up to 7878 conditions per place. [2024-10-24 19:17:58,889 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 534 selfloop transitions, 100 changer transitions 0/663 dead transitions. [2024-10-24 19:17:58,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 663 transitions, 7833 flow [2024-10-24 19:17:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:17:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:17:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 495 transitions. [2024-10-24 19:17:58,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-24 19:17:58,892 INFO L175 Difference]: Start difference. First operand has 180 places, 288 transitions, 3118 flow. Second operand 12 states and 495 transitions. [2024-10-24 19:17:58,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 663 transitions, 7833 flow [2024-10-24 19:17:59,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 663 transitions, 6893 flow, removed 253 selfloop flow, removed 7 redundant places. [2024-10-24 19:17:59,143 INFO L231 Difference]: Finished difference. Result has 189 places, 313 transitions, 3525 flow [2024-10-24 19:17:59,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3525, PETRI_PLACES=189, PETRI_TRANSITIONS=313} [2024-10-24 19:17:59,144 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 127 predicate places. [2024-10-24 19:17:59,144 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 313 transitions, 3525 flow [2024-10-24 19:17:59,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.928571428571427) internal successors, (391), 14 states have internal predecessors, (391), 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) [2024-10-24 19:17:59,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:59,144 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:59,148 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 [2024-10-24 19:17:59,344 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 [2024-10-24 19:17:59,345 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:17:59,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash 101340016, now seen corresponding path program 1 times [2024-10-24 19:17:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:59,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272778728] [2024-10-24 19:17:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:59,345 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 [2024-10-24 19:17:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:59,347 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) [2024-10-24 19:17:59,349 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 [2024-10-24 19:17:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:59,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:17:59,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:59,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:17:59,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:59,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272778728] [2024-10-24 19:17:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272778728] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:59,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:59,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-24 19:17:59,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218241182] [2024-10-24 19:17:59,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:59,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:17:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:17:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:17:59,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-24 19:17:59,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 313 transitions, 3525 flow. Second operand has 14 states, 14 states have (on average 33.142857142857146) internal successors, (464), 14 states have internal predecessors, (464), 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) [2024-10-24 19:17:59,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:59,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-24 19:17:59,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:02,730 INFO L124 PetriNetUnfolderBase]: 9704/18258 cut-off events. [2024-10-24 19:18:02,730 INFO L125 PetriNetUnfolderBase]: For 100684/100874 co-relation queries the response was YES. [2024-10-24 19:18:02,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73324 conditions, 18258 events. 9704/18258 cut-off events. For 100684/100874 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 139905 event pairs, 6099 based on Foata normal form. 48/17955 useless extension candidates. Maximal degree in co-relation 73049. Up to 11982 conditions per place. [2024-10-24 19:18:02,885 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 279 selfloop transitions, 76 changer transitions 0/397 dead transitions. [2024-10-24 19:18:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 397 transitions, 4843 flow [2024-10-24 19:18:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:18:02,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:18:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 464 transitions. [2024-10-24 19:18:02,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6391184573002755 [2024-10-24 19:18:02,888 INFO L175 Difference]: Start difference. First operand has 189 places, 313 transitions, 3525 flow. Second operand 11 states and 464 transitions. [2024-10-24 19:18:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 397 transitions, 4843 flow [2024-10-24 19:18:03,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 397 transitions, 4708 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-10-24 19:18:03,055 INFO L231 Difference]: Finished difference. Result has 197 places, 306 transitions, 3504 flow [2024-10-24 19:18:03,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3504, PETRI_PLACES=197, PETRI_TRANSITIONS=306} [2024-10-24 19:18:03,056 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 135 predicate places. [2024-10-24 19:18:03,056 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 306 transitions, 3504 flow [2024-10-24 19:18:03,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.142857142857146) internal successors, (464), 14 states have internal predecessors, (464), 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) [2024-10-24 19:18:03,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:03,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:03,060 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 (23)] Forceful destruction successful, exit code 0 [2024-10-24 19:18:03,256 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 [2024-10-24 19:18:03,257 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:03,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1714847352, now seen corresponding path program 1 times [2024-10-24 19:18:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:03,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373978087] [2024-10-24 19:18:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:03,258 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 [2024-10-24 19:18:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:03,259 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) [2024-10-24 19:18:03,259 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 [2024-10-24 19:18:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:03,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:18:03,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:03,319 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:03,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:03,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373978087] [2024-10-24 19:18:03,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373978087] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:03,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:03,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:18:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54529361] [2024-10-24 19:18:03,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:03,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:18:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:18:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:18:03,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-24 19:18:03,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 306 transitions, 3504 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-10-24 19:18:03,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:03,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-24 19:18:03,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:05,244 INFO L124 PetriNetUnfolderBase]: 7720/15086 cut-off events. [2024-10-24 19:18:05,245 INFO L125 PetriNetUnfolderBase]: For 77050/77120 co-relation queries the response was YES. [2024-10-24 19:18:05,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59448 conditions, 15086 events. 7720/15086 cut-off events. For 77050/77120 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 116958 event pairs, 2611 based on Foata normal form. 300/14842 useless extension candidates. Maximal degree in co-relation 59161. Up to 10228 conditions per place. [2024-10-24 19:18:05,369 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 261 selfloop transitions, 16 changer transitions 5/330 dead transitions. [2024-10-24 19:18:05,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 330 transitions, 4354 flow [2024-10-24 19:18:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:18:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:18:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-10-24 19:18:05,370 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2024-10-24 19:18:05,370 INFO L175 Difference]: Start difference. First operand has 197 places, 306 transitions, 3504 flow. Second operand 3 states and 140 transitions. [2024-10-24 19:18:05,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 330 transitions, 4354 flow [2024-10-24 19:18:05,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 330 transitions, 4205 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 19:18:05,509 INFO L231 Difference]: Finished difference. Result has 192 places, 320 transitions, 3691 flow [2024-10-24 19:18:05,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3691, PETRI_PLACES=192, PETRI_TRANSITIONS=320} [2024-10-24 19:18:05,510 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 130 predicate places. [2024-10-24 19:18:05,510 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 320 transitions, 3691 flow [2024-10-24 19:18:05,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-10-24 19:18:05,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:05,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:05,513 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 [2024-10-24 19:18:05,710 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 [2024-10-24 19:18:05,711 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:05,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1169059066, now seen corresponding path program 1 times [2024-10-24 19:18:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155538421] [2024-10-24 19:18:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:05,712 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 [2024-10-24 19:18:05,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:05,714 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) [2024-10-24 19:18:05,715 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 [2024-10-24 19:18:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:05,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:18:05,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:06,054 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:06,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155538421] [2024-10-24 19:18:06,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155538421] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:06,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:06,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 19:18:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416380318] [2024-10-24 19:18:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:06,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:18:06,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:18:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:18:06,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-24 19:18:06,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 320 transitions, 3691 flow. Second operand has 9 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2024-10-24 19:18:06,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:06,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-24 19:18:06,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:08,577 INFO L124 PetriNetUnfolderBase]: 8046/15456 cut-off events. [2024-10-24 19:18:08,577 INFO L125 PetriNetUnfolderBase]: For 86042/86128 co-relation queries the response was YES. [2024-10-24 19:18:08,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62383 conditions, 15456 events. 8046/15456 cut-off events. For 86042/86128 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 118354 event pairs, 2749 based on Foata normal form. 28/14884 useless extension candidates. Maximal degree in co-relation 62108. Up to 5723 conditions per place. [2024-10-24 19:18:08,709 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 362 selfloop transitions, 82 changer transitions 18/510 dead transitions. [2024-10-24 19:18:08,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 510 transitions, 6742 flow [2024-10-24 19:18:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 19:18:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-24 19:18:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 537 transitions. [2024-10-24 19:18:08,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6258741258741258 [2024-10-24 19:18:08,710 INFO L175 Difference]: Start difference. First operand has 192 places, 320 transitions, 3691 flow. Second operand 13 states and 537 transitions. [2024-10-24 19:18:08,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 510 transitions, 6742 flow [2024-10-24 19:18:08,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 510 transitions, 6582 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-10-24 19:18:08,990 INFO L231 Difference]: Finished difference. Result has 206 places, 381 transitions, 4755 flow [2024-10-24 19:18:08,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4755, PETRI_PLACES=206, PETRI_TRANSITIONS=381} [2024-10-24 19:18:08,990 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 144 predicate places. [2024-10-24 19:18:08,990 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 381 transitions, 4755 flow [2024-10-24 19:18:08,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2024-10-24 19:18:08,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:08,991 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:08,993 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 (25)] Ended with exit code 0 [2024-10-24 19:18:09,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /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 [2024-10-24 19:18:09,194 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:09,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1034860634, now seen corresponding path program 2 times [2024-10-24 19:18:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283632633] [2024-10-24 19:18:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:18:09,195 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 [2024-10-24 19:18:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:09,196 INFO L229 MonitoredProcess]: Starting monitored process 26 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) [2024-10-24 19:18:09,196 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 (26)] Waiting until timeout for monitored process [2024-10-24 19:18:09,272 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:18:09,272 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:09,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:18:09,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:09,288 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 [2024-10-24 19:18:09,293 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 8 treesize of output 7 [2024-10-24 19:18:09,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:18:09,349 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 16 treesize of output 11 [2024-10-24 19:18:09,356 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:18:09,356 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 [2024-10-24 19:18:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:18:09,502 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 19:18:09,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283632633] [2024-10-24 19:18:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283632633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:09,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:09,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:18:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145208809] [2024-10-24 19:18:09,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:09,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:18:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:09,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:18:09,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:18:10,948 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-10-24 19:18:10,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 381 transitions, 4755 flow. Second operand has 12 states, 12 states have (on average 26.833333333333332) internal successors, (322), 12 states have internal predecessors, (322), 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) [2024-10-24 19:18:10,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:10,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-10-24 19:18:10,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:15,104 INFO L124 PetriNetUnfolderBase]: 12509/21614 cut-off events. [2024-10-24 19:18:15,105 INFO L125 PetriNetUnfolderBase]: For 124855/124973 co-relation queries the response was YES. [2024-10-24 19:18:15,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92475 conditions, 21614 events. 12509/21614 cut-off events. For 124855/124973 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 150296 event pairs, 2479 based on Foata normal form. 545/21915 useless extension candidates. Maximal degree in co-relation 92355. Up to 6301 conditions per place. [2024-10-24 19:18:15,305 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 741 selfloop transitions, 111 changer transitions 0/878 dead transitions. [2024-10-24 19:18:15,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 878 transitions, 12926 flow [2024-10-24 19:18:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:18:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:18:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 454 transitions. [2024-10-24 19:18:15,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2024-10-24 19:18:15,308 INFO L175 Difference]: Start difference. First operand has 206 places, 381 transitions, 4755 flow. Second operand 12 states and 454 transitions. [2024-10-24 19:18:15,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 878 transitions, 12926 flow [2024-10-24 19:18:15,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 878 transitions, 12904 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-24 19:18:15,509 INFO L231 Difference]: Finished difference. Result has 219 places, 403 transitions, 5384 flow [2024-10-24 19:18:15,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5384, PETRI_PLACES=219, PETRI_TRANSITIONS=403} [2024-10-24 19:18:15,509 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 157 predicate places. [2024-10-24 19:18:15,509 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 403 transitions, 5384 flow [2024-10-24 19:18:15,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.833333333333332) internal successors, (322), 12 states have internal predecessors, (322), 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) [2024-10-24 19:18:15,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:15,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:15,514 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 (26)] Ended with exit code 0 [2024-10-24 19:18:15,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /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 [2024-10-24 19:18:15,711 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:15,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash 218346782, now seen corresponding path program 2 times [2024-10-24 19:18:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005270328] [2024-10-24 19:18:15,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:18:15,711 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 [2024-10-24 19:18:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:15,712 INFO L229 MonitoredProcess]: Starting monitored process 27 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) [2024-10-24 19:18:15,713 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 (27)] Waiting until timeout for monitored process [2024-10-24 19:18:15,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:18:15,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:15,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:18:15,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:15,953 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:15,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:15,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005270328] [2024-10-24 19:18:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005270328] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:15,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:15,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 19:18:15,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521647854] [2024-10-24 19:18:15,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:15,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:18:15,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:18:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:18:16,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-24 19:18:16,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 403 transitions, 5384 flow. Second operand has 9 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2024-10-24 19:18:16,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:16,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-24 19:18:16,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:19,248 INFO L124 PetriNetUnfolderBase]: 8838/16792 cut-off events. [2024-10-24 19:18:19,248 INFO L125 PetriNetUnfolderBase]: For 124864/125030 co-relation queries the response was YES. [2024-10-24 19:18:19,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80125 conditions, 16792 events. 8838/16792 cut-off events. For 124864/125030 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 128104 event pairs, 3052 based on Foata normal form. 56/16166 useless extension candidates. Maximal degree in co-relation 79838. Up to 6288 conditions per place. [2024-10-24 19:18:19,394 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 351 selfloop transitions, 89 changer transitions 18/519 dead transitions. [2024-10-24 19:18:19,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 519 transitions, 7569 flow [2024-10-24 19:18:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 19:18:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-24 19:18:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 528 transitions. [2024-10-24 19:18:19,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-10-24 19:18:19,397 INFO L175 Difference]: Start difference. First operand has 219 places, 403 transitions, 5384 flow. Second operand 13 states and 528 transitions. [2024-10-24 19:18:19,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 519 transitions, 7569 flow [2024-10-24 19:18:19,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 519 transitions, 7508 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 19:18:19,605 INFO L231 Difference]: Finished difference. Result has 226 places, 401 transitions, 5470 flow [2024-10-24 19:18:19,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5470, PETRI_PLACES=226, PETRI_TRANSITIONS=401} [2024-10-24 19:18:19,606 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 164 predicate places. [2024-10-24 19:18:19,606 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 401 transitions, 5470 flow [2024-10-24 19:18:19,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2024-10-24 19:18:19,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:19,606 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:19,609 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 (27)] Ended with exit code 0 [2024-10-24 19:18:19,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /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 [2024-10-24 19:18:19,807 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:19,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash -319644808, now seen corresponding path program 3 times [2024-10-24 19:18:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:19,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707493105] [2024-10-24 19:18:19,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:18:19,808 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 [2024-10-24 19:18:19,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:19,809 INFO L229 MonitoredProcess]: Starting monitored process 28 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) [2024-10-24 19:18:19,810 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 (28)] Waiting until timeout for monitored process [2024-10-24 19:18:19,856 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-24 19:18:19,856 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:19,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:18:19,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:20,094 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:20,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:20,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707493105] [2024-10-24 19:18:20,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707493105] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:20,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:20,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 19:18:20,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671009741] [2024-10-24 19:18:20,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:20,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:18:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:18:20,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:18:20,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-24 19:18:20,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 401 transitions, 5470 flow. Second operand has 9 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2024-10-24 19:18:20,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:20,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-24 19:18:20,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:23,032 INFO L124 PetriNetUnfolderBase]: 8734/16578 cut-off events. [2024-10-24 19:18:23,032 INFO L125 PetriNetUnfolderBase]: For 132128/132294 co-relation queries the response was YES. [2024-10-24 19:18:23,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81230 conditions, 16578 events. 8734/16578 cut-off events. For 132128/132294 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 126239 event pairs, 3232 based on Foata normal form. 55/15951 useless extension candidates. Maximal degree in co-relation 81114. Up to 6802 conditions per place. [2024-10-24 19:18:23,214 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 309 selfloop transitions, 60 changer transitions 45/475 dead transitions. [2024-10-24 19:18:23,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 475 transitions, 7004 flow [2024-10-24 19:18:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:18:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:18:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 346 transitions. [2024-10-24 19:18:23,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6553030303030303 [2024-10-24 19:18:23,216 INFO L175 Difference]: Start difference. First operand has 226 places, 401 transitions, 5470 flow. Second operand 8 states and 346 transitions. [2024-10-24 19:18:23,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 475 transitions, 7004 flow [2024-10-24 19:18:23,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 475 transitions, 6946 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-24 19:18:23,470 INFO L231 Difference]: Finished difference. Result has 230 places, 389 transitions, 5315 flow [2024-10-24 19:18:23,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5315, PETRI_PLACES=230, PETRI_TRANSITIONS=389} [2024-10-24 19:18:23,471 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 168 predicate places. [2024-10-24 19:18:23,471 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 389 transitions, 5315 flow [2024-10-24 19:18:23,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.22222222222222) internal successors, (308), 9 states have internal predecessors, (308), 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) [2024-10-24 19:18:23,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:23,471 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:23,474 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 (28)] Forceful destruction successful, exit code 0 [2024-10-24 19:18:23,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /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 [2024-10-24 19:18:23,672 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:23,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:23,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2109452071, now seen corresponding path program 3 times [2024-10-24 19:18:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:23,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633760445] [2024-10-24 19:18:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:18:23,673 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 [2024-10-24 19:18:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:23,674 INFO L229 MonitoredProcess]: Starting monitored process 29 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) [2024-10-24 19:18:23,675 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 (29)] Waiting until timeout for monitored process [2024-10-24 19:18:23,784 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 19:18:23,785 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:23,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:18:23,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:23,796 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 8 treesize of output 7 [2024-10-24 19:18:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 19:18:24,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 19:18:24,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:24,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633760445] [2024-10-24 19:18:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633760445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:24,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-10-24 19:18:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828429678] [2024-10-24 19:18:24,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:24,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:18:24,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:18:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:18:25,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-10-24 19:18:25,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 389 transitions, 5315 flow. Second operand has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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) [2024-10-24 19:18:25,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:25,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-10-24 19:18:25,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:29,250 INFO L124 PetriNetUnfolderBase]: 13502/25253 cut-off events. [2024-10-24 19:18:29,250 INFO L125 PetriNetUnfolderBase]: For 237067/237251 co-relation queries the response was YES. [2024-10-24 19:18:29,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128024 conditions, 25253 events. 13502/25253 cut-off events. For 237067/237251 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 204088 event pairs, 6376 based on Foata normal form. 168/24709 useless extension candidates. Maximal degree in co-relation 127873. Up to 12306 conditions per place. [2024-10-24 19:18:29,543 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 396 selfloop transitions, 171 changer transitions 0/619 dead transitions. [2024-10-24 19:18:29,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 619 transitions, 9820 flow [2024-10-24 19:18:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:18:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:18:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 311 transitions. [2024-10-24 19:18:29,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5890151515151515 [2024-10-24 19:18:29,544 INFO L175 Difference]: Start difference. First operand has 230 places, 389 transitions, 5315 flow. Second operand 8 states and 311 transitions. [2024-10-24 19:18:29,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 619 transitions, 9820 flow [2024-10-24 19:18:30,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 619 transitions, 9557 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-10-24 19:18:30,202 INFO L231 Difference]: Finished difference. Result has 230 places, 431 transitions, 6593 flow [2024-10-24 19:18:30,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6593, PETRI_PLACES=230, PETRI_TRANSITIONS=431} [2024-10-24 19:18:30,203 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 168 predicate places. [2024-10-24 19:18:30,203 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 431 transitions, 6593 flow [2024-10-24 19:18:30,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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) [2024-10-24 19:18:30,203 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:30,203 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:18:30,208 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 (29)] Forceful destruction successful, exit code 0 [2024-10-24 19:18:30,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /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 [2024-10-24 19:18:30,404 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:18:30,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash 629052049, now seen corresponding path program 3 times [2024-10-24 19:18:30,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:30,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126616809] [2024-10-24 19:18:30,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:18:30,405 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 [2024-10-24 19:18:30,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:30,407 INFO L229 MonitoredProcess]: Starting monitored process 30 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) [2024-10-24 19:18:30,408 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 (30)] Waiting until timeout for monitored process [2024-10-24 19:18:30,577 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:18:30,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:30,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:18:30,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:30,589 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 8 treesize of output 7 [2024-10-24 19:18:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:30,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:32,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126616809] [2024-10-24 19:18:32,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126616809] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:32,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:32,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:18:32,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804622357] [2024-10-24 19:18:32,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:32,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:18:32,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:18:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650