/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/goblint-regression/04-mutex_36-trylock_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 22:12:01,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 22:12:01,814 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 22:12:01,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 22:12:01,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 22:12:01,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 22:12:01,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 22:12:01,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 22:12:01,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 22:12:01,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 22:12:01,861 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 22:12:01,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 22:12:01,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 22:12:01,862 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 22:12:01,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 22:12:01,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 22:12:01,863 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 22:12:01,863 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 22:12:01,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 22:12:01,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 22:12:01,864 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 22:12:01,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 22:12:01,869 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 22:12:01,869 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 22:12:01,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 22:12:01,873 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 22:12:01,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 22:12:01,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 22:12:01,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 22:12:01,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 22:12:01,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 22:12:01,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 22:12:01,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 22:12:01,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 22:12:01,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 22:12:01,876 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 22:12:02,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 22:12:02,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 22:12:02,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 22:12:02,192 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 22:12:02,193 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 22:12:02,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/04-mutex_36-trylock_nr.i [2023-08-26 22:12:03,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 22:12:03,787 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 22:12:03,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/04-mutex_36-trylock_nr.i [2023-08-26 22:12:03,808 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2cd1b8c7/71a8e6eec2f1443495b157d86a5f98b9/FLAG2adcc55c2 [2023-08-26 22:12:03,825 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2cd1b8c7/71a8e6eec2f1443495b157d86a5f98b9 [2023-08-26 22:12:03,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 22:12:03,832 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 22:12:03,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 22:12:03,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 22:12:03,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 22:12:03,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 10:12:03" (1/1) ... [2023-08-26 22:12:03,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71462c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:03, skipping insertion in model container [2023-08-26 22:12:03,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 10:12:03" (1/1) ... [2023-08-26 22:12:03,913 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 22:12:04,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 22:12:04,695 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 22:12:04,708 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 22:12:04,709 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 22:12:04,716 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [739] [2023-08-26 22:12:04,729 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1798] [2023-08-26 22:12:04,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 22:12:04,854 WARN L669 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 22:12:04,854 WARN L669 CHandler]: The function sleep is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 22:12:04,854 WARN L669 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 22:12:04,854 WARN L669 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 22:12:04,861 INFO L206 MainTranslator]: Completed translation [2023-08-26 22:12:04,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04 WrapperNode [2023-08-26 22:12:04,861 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 22:12:04,862 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 22:12:04,862 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 22:12:04,862 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 22:12:04,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,915 INFO L138 Inliner]: procedures = 524, calls = 69, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 133 [2023-08-26 22:12:04,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 22:12:04,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 22:12:04,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 22:12:04,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 22:12:04,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 22:12:04,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 22:12:04,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 22:12:04,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 22:12:04,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (1/1) ... [2023-08-26 22:12:04,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 22:12:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:04,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 22:12:04,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 22:12:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure counter_thread [2023-08-26 22:12:05,018 INFO L138 BoogieDeclarations]: Found implementation of procedure counter_thread [2023-08-26 22:12:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure sleep [2023-08-26 22:12:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure monitor_thread [2023-08-26 22:12:05,018 INFO L138 BoogieDeclarations]: Found implementation of procedure monitor_thread [2023-08-26 22:12:05,018 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 22:12:05,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-26 22:12:05,019 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-08-26 22:12:05,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 22:12:05,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 22:12:05,021 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 22:12:05,269 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 22:12:05,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 22:12:05,485 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 22:12:05,493 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 22:12:05,494 INFO L302 CfgBuilder]: Removed 19 assume(true) statements. [2023-08-26 22:12:05,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 10:12:05 BoogieIcfgContainer [2023-08-26 22:12:05,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 22:12:05,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 22:12:05,498 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 22:12:05,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 22:12:05,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 10:12:03" (1/3) ... [2023-08-26 22:12:05,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c347b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 10:12:05, skipping insertion in model container [2023-08-26 22:12:05,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 10:12:04" (2/3) ... [2023-08-26 22:12:05,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c347b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 10:12:05, skipping insertion in model container [2023-08-26 22:12:05,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 10:12:05" (3/3) ... [2023-08-26 22:12:05,503 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_36-trylock_nr.i [2023-08-26 22:12:05,518 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 22:12:05,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 22:12:05,518 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 22:12:05,584 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 22:12:05,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 250 transitions, 516 flow [2023-08-26 22:12:05,689 INFO L124 PetriNetUnfolderBase]: 32/248 cut-off events. [2023-08-26 22:12:05,690 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 22:12:05,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 248 events. 32/248 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 559 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 150. Up to 5 conditions per place. [2023-08-26 22:12:05,696 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 250 transitions, 516 flow [2023-08-26 22:12:05,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 221 transitions, 451 flow [2023-08-26 22:12:05,705 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 22:12:05,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 221 transitions, 451 flow [2023-08-26 22:12:05,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 221 transitions, 451 flow [2023-08-26 22:12:05,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 221 transitions, 451 flow [2023-08-26 22:12:05,755 INFO L124 PetriNetUnfolderBase]: 28/221 cut-off events. [2023-08-26 22:12:05,755 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 22:12:05,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 221 events. 28/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 500 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 150. Up to 5 conditions per place. [2023-08-26 22:12:05,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 13862 [2023-08-26 22:12:16,652 INFO L134 LiptonReduction]: Checked pairs total: 14838 [2023-08-26 22:12:16,652 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-08-26 22:12:16,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 22:12:16,669 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@4011c7b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 22:12:16,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-08-26 22:12:16,670 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 22:12:16,671 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 22:12:16,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 22:12:16,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:16,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 22:12:16,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:16,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1025, now seen corresponding path program 1 times [2023-08-26 22:12:16,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:16,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054470283] [2023-08-26 22:12:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:16,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:16,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:16,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054470283] [2023-08-26 22:12:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054470283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 22:12:16,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 22:12:16,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 22:12:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291649251] [2023-08-26 22:12:16,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 22:12:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 22:12:16,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 22:12:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 22:12:16,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 497 [2023-08-26 22:12:16,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 50 transitions, 109 flow. Second operand has 2 states, 2 states have (on average 219.5) internal successors, (439), 2 states have internal predecessors, (439), 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) [2023-08-26 22:12:16,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:16,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 497 [2023-08-26 22:12:16,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:17,038 INFO L124 PetriNetUnfolderBase]: 328/595 cut-off events. [2023-08-26 22:12:17,038 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 22:12:17,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 595 events. 328/595 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2837 event pairs, 234 based on Foata normal form. 79/340 useless extension candidates. Maximal degree in co-relation 1056. Up to 512 conditions per place. [2023-08-26 22:12:17,045 INFO L140 encePairwiseOnDemand]: 484/497 looper letters, 25 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-26 22:12:17,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 117 flow [2023-08-26 22:12:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 22:12:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 22:12:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 476 transitions. [2023-08-26 22:12:17,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788732394366197 [2023-08-26 22:12:17,058 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 476 transitions. [2023-08-26 22:12:17,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 476 transitions. [2023-08-26 22:12:17,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:17,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 476 transitions. [2023-08-26 22:12:17,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 238.0) internal successors, (476), 2 states have internal predecessors, (476), 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) [2023-08-26 22:12:17,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 497.0) internal successors, (1491), 3 states have internal predecessors, (1491), 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) [2023-08-26 22:12:17,072 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 497.0) internal successors, (1491), 3 states have internal predecessors, (1491), 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) [2023-08-26 22:12:17,074 INFO L175 Difference]: Start difference. First operand has 39 places, 50 transitions, 109 flow. Second operand 2 states and 476 transitions. [2023-08-26 22:12:17,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 117 flow [2023-08-26 22:12:17,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 22:12:17,078 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 62 flow [2023-08-26 22:12:17,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-08-26 22:12:17,083 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-26 22:12:17,083 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 62 flow [2023-08-26 22:12:17,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 219.5) internal successors, (439), 2 states have internal predecessors, (439), 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) [2023-08-26 22:12:17,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:17,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 22:12:17,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 22:12:17,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:17,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash 968796351, now seen corresponding path program 1 times [2023-08-26 22:12:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:17,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624458310] [2023-08-26 22:12:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:17,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624458310] [2023-08-26 22:12:17,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624458310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 22:12:17,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 22:12:17,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 22:12:17,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615631810] [2023-08-26 22:12:17,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 22:12:17,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 22:12:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 22:12:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 22:12:17,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:12:17,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2023-08-26 22:12:17,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:17,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:12:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:17,466 INFO L124 PetriNetUnfolderBase]: 711/1088 cut-off events. [2023-08-26 22:12:17,466 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 22:12:17,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 1088 events. 711/1088 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4541 event pairs, 195 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 2197. Up to 725 conditions per place. [2023-08-26 22:12:17,472 INFO L140 encePairwiseOnDemand]: 490/497 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-26 22:12:17,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 51 transitions, 211 flow [2023-08-26 22:12:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 22:12:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 22:12:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-08-26 22:12:17,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46344735077129445 [2023-08-26 22:12:17,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-08-26 22:12:17,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-08-26 22:12:17,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:17,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-08-26 22:12:17,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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) [2023-08-26 22:12:17,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 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) [2023-08-26 22:12:17,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 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) [2023-08-26 22:12:17,483 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 62 flow. Second operand 3 states and 691 transitions. [2023-08-26 22:12:17,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 51 transitions, 211 flow [2023-08-26 22:12:17,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 22:12:17,485 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 87 flow [2023-08-26 22:12:17,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-26 22:12:17,486 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2023-08-26 22:12:17,486 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 87 flow [2023-08-26 22:12:17,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2023-08-26 22:12:17,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:17,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 22:12:17,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 22:12:17,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:17,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash -32081301, now seen corresponding path program 1 times [2023-08-26 22:12:17,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:17,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118486953] [2023-08-26 22:12:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:17,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:17,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118486953] [2023-08-26 22:12:17,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118486953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 22:12:17,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 22:12:17,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 22:12:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438314837] [2023-08-26 22:12:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 22:12:17,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 22:12:17,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:17,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 22:12:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 22:12:17,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 497 [2023-08-26 22:12:17,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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) [2023-08-26 22:12:17,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:17,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 497 [2023-08-26 22:12:17,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:17,745 INFO L124 PetriNetUnfolderBase]: 566/909 cut-off events. [2023-08-26 22:12:17,745 INFO L125 PetriNetUnfolderBase]: For 11/20 co-relation queries the response was YES. [2023-08-26 22:12:17,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 909 events. 566/909 cut-off events. For 11/20 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4121 event pairs, 106 based on Foata normal form. 0/487 useless extension candidates. Maximal degree in co-relation 1962. Up to 670 conditions per place. [2023-08-26 22:12:17,750 INFO L140 encePairwiseOnDemand]: 495/497 looper letters, 41 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 22:12:17,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 199 flow [2023-08-26 22:12:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 22:12:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 22:12:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-26 22:12:17,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567404426559356 [2023-08-26 22:12:17,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-26 22:12:17,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-26 22:12:17,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:17,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-26 22:12:17,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 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) [2023-08-26 22:12:17,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 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) [2023-08-26 22:12:17,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 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) [2023-08-26 22:12:17,758 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 87 flow. Second operand 3 states and 681 transitions. [2023-08-26 22:12:17,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 199 flow [2023-08-26 22:12:17,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 22:12:17,761 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 83 flow [2023-08-26 22:12:17,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-26 22:12:17,762 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-08-26 22:12:17,765 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 83 flow [2023-08-26 22:12:17,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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) [2023-08-26 22:12:17,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:17,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 22:12:17,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 22:12:17,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:17,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash -29932719, now seen corresponding path program 1 times [2023-08-26 22:12:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:17,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853404078] [2023-08-26 22:12:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:17,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:17,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:17,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853404078] [2023-08-26 22:12:17,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853404078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 22:12:17,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 22:12:17,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 22:12:17,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641151984] [2023-08-26 22:12:17,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 22:12:17,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 22:12:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:17,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 22:12:17,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 22:12:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-08-26 22:12:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2023-08-26 22:12:17,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:17,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-08-26 22:12:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:18,020 INFO L124 PetriNetUnfolderBase]: 891/1562 cut-off events. [2023-08-26 22:12:18,021 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2023-08-26 22:12:18,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3333 conditions, 1562 events. 891/1562 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8839 event pairs, 410 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 3328. Up to 874 conditions per place. [2023-08-26 22:12:18,028 INFO L140 encePairwiseOnDemand]: 493/497 looper letters, 42 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-26 22:12:18,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 48 transitions, 221 flow [2023-08-26 22:12:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 22:12:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 22:12:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2023-08-26 22:12:18,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46277665995975853 [2023-08-26 22:12:18,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2023-08-26 22:12:18,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2023-08-26 22:12:18,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:18,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2023-08-26 22:12:18,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 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) [2023-08-26 22:12:18,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 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) [2023-08-26 22:12:18,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 497.0) internal successors, (1988), 4 states have internal predecessors, (1988), 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) [2023-08-26 22:12:18,037 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 83 flow. Second operand 3 states and 690 transitions. [2023-08-26 22:12:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 48 transitions, 221 flow [2023-08-26 22:12:18,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 22:12:18,038 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 97 flow [2023-08-26 22:12:18,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-26 22:12:18,039 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-26 22:12:18,039 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 97 flow [2023-08-26 22:12:18,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2023-08-26 22:12:18,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:18,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 22:12:18,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 22:12:18,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:18,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash -32081364, now seen corresponding path program 1 times [2023-08-26 22:12:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:18,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994949605] [2023-08-26 22:12:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:18,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994949605] [2023-08-26 22:12:18,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994949605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960603950] [2023-08-26 22:12:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:18,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:18,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:18,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:18,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 22:12:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:18,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 22:12:18,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:18,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:18,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960603950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:18,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:18,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 22:12:18,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233538617] [2023-08-26 22:12:18,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:18,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 22:12:18,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 22:12:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 22:12:18,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:12:18,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 214.42857142857142) internal successors, (1501), 7 states have internal predecessors, (1501), 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) [2023-08-26 22:12:18,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:18,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:12:18,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:18,802 INFO L124 PetriNetUnfolderBase]: 2543/3846 cut-off events. [2023-08-26 22:12:18,802 INFO L125 PetriNetUnfolderBase]: For 632/632 co-relation queries the response was YES. [2023-08-26 22:12:18,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9237 conditions, 3846 events. 2543/3846 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19239 event pairs, 481 based on Foata normal form. 72/2832 useless extension candidates. Maximal degree in co-relation 9230. Up to 922 conditions per place. [2023-08-26 22:12:18,824 INFO L140 encePairwiseOnDemand]: 491/497 looper letters, 134 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2023-08-26 22:12:18,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 148 transitions, 736 flow [2023-08-26 22:12:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 22:12:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 22:12:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1633 transitions. [2023-08-26 22:12:18,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2023-08-26 22:12:18,830 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1633 transitions. [2023-08-26 22:12:18,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1633 transitions. [2023-08-26 22:12:18,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:18,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1633 transitions. [2023-08-26 22:12:18,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 233.28571428571428) internal successors, (1633), 7 states have internal predecessors, (1633), 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) [2023-08-26 22:12:18,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 497.0) internal successors, (3976), 8 states have internal predecessors, (3976), 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) [2023-08-26 22:12:18,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 497.0) internal successors, (3976), 8 states have internal predecessors, (3976), 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) [2023-08-26 22:12:18,842 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 97 flow. Second operand 7 states and 1633 transitions. [2023-08-26 22:12:18,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 148 transitions, 736 flow [2023-08-26 22:12:18,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 148 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 22:12:18,848 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 215 flow [2023-08-26 22:12:18,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-26 22:12:18,851 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-26 22:12:18,851 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 215 flow [2023-08-26 22:12:18,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 214.42857142857142) internal successors, (1501), 7 states have internal predecessors, (1501), 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) [2023-08-26 22:12:18,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:18,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 22:12:18,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 22:12:19,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:19,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:19,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash -32081365, now seen corresponding path program 1 times [2023-08-26 22:12:19,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:19,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501495865] [2023-08-26 22:12:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:19,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501495865] [2023-08-26 22:12:19,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501495865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:19,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838149720] [2023-08-26 22:12:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:19,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:19,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:19,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 22:12:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:19,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 22:12:19,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:19,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 22:12:19,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838149720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 22:12:19,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 22:12:19,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-26 22:12:19,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074335175] [2023-08-26 22:12:19,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 22:12:19,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 22:12:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 22:12:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 22:12:19,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:12:19,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 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) [2023-08-26 22:12:19,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:19,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:12:19,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:19,622 INFO L124 PetriNetUnfolderBase]: 2091/3212 cut-off events. [2023-08-26 22:12:19,622 INFO L125 PetriNetUnfolderBase]: For 1423/1423 co-relation queries the response was YES. [2023-08-26 22:12:19,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8209 conditions, 3212 events. 2091/3212 cut-off events. For 1423/1423 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16080 event pairs, 481 based on Foata normal form. 292/2778 useless extension candidates. Maximal degree in co-relation 8198. Up to 2290 conditions per place. [2023-08-26 22:12:19,640 INFO L140 encePairwiseOnDemand]: 493/497 looper letters, 51 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-26 22:12:19,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 296 flow [2023-08-26 22:12:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 22:12:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 22:12:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 897 transitions. [2023-08-26 22:12:19,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512072434607646 [2023-08-26 22:12:19,643 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 897 transitions. [2023-08-26 22:12:19,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 897 transitions. [2023-08-26 22:12:19,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:19,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 897 transitions. [2023-08-26 22:12:19,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.25) internal successors, (897), 4 states have internal predecessors, (897), 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) [2023-08-26 22:12:19,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 497.0) internal successors, (2485), 5 states have internal predecessors, (2485), 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) [2023-08-26 22:12:19,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 497.0) internal successors, (2485), 5 states have internal predecessors, (2485), 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) [2023-08-26 22:12:19,649 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 215 flow. Second operand 4 states and 897 transitions. [2023-08-26 22:12:19,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 296 flow [2023-08-26 22:12:19,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 284 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-26 22:12:19,660 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 125 flow [2023-08-26 22:12:19,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-08-26 22:12:19,661 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-08-26 22:12:19,661 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 125 flow [2023-08-26 22:12:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 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) [2023-08-26 22:12:19,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:19,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 22:12:19,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 22:12:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-26 22:12:19,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:19,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash -927912851, now seen corresponding path program 1 times [2023-08-26 22:12:19,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:19,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929588033] [2023-08-26 22:12:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:19,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929588033] [2023-08-26 22:12:19,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929588033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454230784] [2023-08-26 22:12:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:19,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:19,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:19,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 22:12:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:20,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 22:12:20,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:20,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:20,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454230784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:20,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:20,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 22:12:20,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885122575] [2023-08-26 22:12:20,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 22:12:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 22:12:20,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 22:12:20,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-08-26 22:12:20,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 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) [2023-08-26 22:12:20,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:20,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-08-26 22:12:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:20,741 INFO L124 PetriNetUnfolderBase]: 3461/5866 cut-off events. [2023-08-26 22:12:20,741 INFO L125 PetriNetUnfolderBase]: For 2829/2829 co-relation queries the response was YES. [2023-08-26 22:12:20,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13737 conditions, 5866 events. 3461/5866 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38485 event pairs, 613 based on Foata normal form. 0/4375 useless extension candidates. Maximal degree in co-relation 13726. Up to 1353 conditions per place. [2023-08-26 22:12:20,780 INFO L140 encePairwiseOnDemand]: 493/497 looper letters, 117 selfloop transitions, 9 changer transitions 0/129 dead transitions. [2023-08-26 22:12:20,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 129 transitions, 758 flow [2023-08-26 22:12:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 22:12:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 22:12:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1611 transitions. [2023-08-26 22:12:20,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630640988789882 [2023-08-26 22:12:20,785 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1611 transitions. [2023-08-26 22:12:20,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1611 transitions. [2023-08-26 22:12:20,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:20,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1611 transitions. [2023-08-26 22:12:20,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 230.14285714285714) internal successors, (1611), 7 states have internal predecessors, (1611), 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) [2023-08-26 22:12:20,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 497.0) internal successors, (3976), 8 states have internal predecessors, (3976), 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) [2023-08-26 22:12:20,796 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 497.0) internal successors, (3976), 8 states have internal predecessors, (3976), 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) [2023-08-26 22:12:20,797 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 125 flow. Second operand 7 states and 1611 transitions. [2023-08-26 22:12:20,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 129 transitions, 758 flow [2023-08-26 22:12:20,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 129 transitions, 750 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 22:12:20,802 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 181 flow [2023-08-26 22:12:20,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-26 22:12:20,803 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2023-08-26 22:12:20,803 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 181 flow [2023-08-26 22:12:20,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.71428571428572) internal successors, (1524), 7 states have internal predecessors, (1524), 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) [2023-08-26 22:12:20,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:20,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 22:12:20,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 22:12:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:21,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:21,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -927912853, now seen corresponding path program 1 times [2023-08-26 22:12:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108089701] [2023-08-26 22:12:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:21,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108089701] [2023-08-26 22:12:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108089701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:21,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567413006] [2023-08-26 22:12:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:21,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:21,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:21,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:21,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 22:12:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:21,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 22:12:21,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:21,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 22:12:21,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567413006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 22:12:21,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 22:12:21,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-26 22:12:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341334363] [2023-08-26 22:12:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 22:12:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 22:12:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 22:12:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 22:12:21,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-08-26 22:12:21,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 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) [2023-08-26 22:12:21,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:21,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-08-26 22:12:21,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:21,693 INFO L124 PetriNetUnfolderBase]: 3132/5468 cut-off events. [2023-08-26 22:12:21,694 INFO L125 PetriNetUnfolderBase]: For 2736/2736 co-relation queries the response was YES. [2023-08-26 22:12:21,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13429 conditions, 5468 events. 3132/5468 cut-off events. For 2736/2736 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 36950 event pairs, 90 based on Foata normal form. 138/4479 useless extension candidates. Maximal degree in co-relation 13415. Up to 3616 conditions per place. [2023-08-26 22:12:21,717 INFO L140 encePairwiseOnDemand]: 494/497 looper letters, 63 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-26 22:12:21,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 420 flow [2023-08-26 22:12:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 22:12:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 22:12:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 912 transitions. [2023-08-26 22:12:21,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45875251509054327 [2023-08-26 22:12:21,721 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 912 transitions. [2023-08-26 22:12:21,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 912 transitions. [2023-08-26 22:12:21,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:21,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 912 transitions. [2023-08-26 22:12:21,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 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) [2023-08-26 22:12:21,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 497.0) internal successors, (2485), 5 states have internal predecessors, (2485), 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) [2023-08-26 22:12:21,727 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 497.0) internal successors, (2485), 5 states have internal predecessors, (2485), 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) [2023-08-26 22:12:21,727 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 181 flow. Second operand 4 states and 912 transitions. [2023-08-26 22:12:21,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 420 flow [2023-08-26 22:12:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 412 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 22:12:21,735 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 150 flow [2023-08-26 22:12:21,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2023-08-26 22:12:21,736 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2023-08-26 22:12:21,736 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 150 flow [2023-08-26 22:12:21,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 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) [2023-08-26 22:12:21,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:21,737 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-26 22:12:21,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 22:12:21,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:21,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:21,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2044599295, now seen corresponding path program 2 times [2023-08-26 22:12:21,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:21,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179312679] [2023-08-26 22:12:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:21,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179312679] [2023-08-26 22:12:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179312679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935328066] [2023-08-26 22:12:22,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 22:12:22,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:22,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:22,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:22,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 22:12:22,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 22:12:22,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:12:22,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 22:12:22,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:22,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:22,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935328066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:22,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:22,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-26 22:12:22,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744277462] [2023-08-26 22:12:22,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:22,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 22:12:22,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:22,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 22:12:22,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 22:12:22,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:12:22,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 213.76923076923077) internal successors, (2779), 13 states have internal predecessors, (2779), 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) [2023-08-26 22:12:22,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:22,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:12:22,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:23,534 INFO L124 PetriNetUnfolderBase]: 8689/13191 cut-off events. [2023-08-26 22:12:23,534 INFO L125 PetriNetUnfolderBase]: For 10021/10021 co-relation queries the response was YES. [2023-08-26 22:12:23,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33113 conditions, 13191 events. 8689/13191 cut-off events. For 10021/10021 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 76864 event pairs, 1041 based on Foata normal form. 924/11524 useless extension candidates. Maximal degree in co-relation 33098. Up to 2307 conditions per place. [2023-08-26 22:12:23,618 INFO L140 encePairwiseOnDemand]: 493/497 looper letters, 259 selfloop transitions, 11 changer transitions 0/270 dead transitions. [2023-08-26 22:12:23,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 270 transitions, 1576 flow [2023-08-26 22:12:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 22:12:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 22:12:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2781 transitions. [2023-08-26 22:12:23,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4662977867203219 [2023-08-26 22:12:23,627 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2781 transitions. [2023-08-26 22:12:23,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2781 transitions. [2023-08-26 22:12:23,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:23,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2781 transitions. [2023-08-26 22:12:23,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.75) internal successors, (2781), 12 states have internal predecessors, (2781), 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) [2023-08-26 22:12:23,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 497.0) internal successors, (6461), 13 states have internal predecessors, (6461), 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) [2023-08-26 22:12:23,646 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 497.0) internal successors, (6461), 13 states have internal predecessors, (6461), 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) [2023-08-26 22:12:23,646 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 150 flow. Second operand 12 states and 2781 transitions. [2023-08-26 22:12:23,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 270 transitions, 1576 flow [2023-08-26 22:12:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 270 transitions, 1543 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 22:12:23,663 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 243 flow [2023-08-26 22:12:23,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=243, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2023-08-26 22:12:23,665 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 27 predicate places. [2023-08-26 22:12:23,665 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 243 flow [2023-08-26 22:12:23,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 213.76923076923077) internal successors, (2779), 13 states have internal predecessors, (2779), 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) [2023-08-26 22:12:23,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:23,666 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-26 22:12:23,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 22:12:23,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:23,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:23,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:23,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1040860717, now seen corresponding path program 2 times [2023-08-26 22:12:23,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:23,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427830296] [2023-08-26 22:12:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:23,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:24,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427830296] [2023-08-26 22:12:24,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427830296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:24,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464878075] [2023-08-26 22:12:24,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 22:12:24,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:24,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:24,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 22:12:24,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 22:12:24,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:12:24,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 22:12:24,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:24,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464878075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:24,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:24,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 22:12:24,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664552845] [2023-08-26 22:12:24,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 22:12:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 22:12:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 22:12:24,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-08-26 22:12:24,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 243 flow. Second operand has 13 states, 13 states have (on average 217.3846153846154) internal successors, (2826), 13 states have internal predecessors, (2826), 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) [2023-08-26 22:12:24,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:24,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-08-26 22:12:24,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:26,184 INFO L124 PetriNetUnfolderBase]: 12828/22274 cut-off events. [2023-08-26 22:12:26,184 INFO L125 PetriNetUnfolderBase]: For 32740/32740 co-relation queries the response was YES. [2023-08-26 22:12:26,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56154 conditions, 22274 events. 12828/22274 cut-off events. For 32740/32740 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 172441 event pairs, 1213 based on Foata normal form. 810/18375 useless extension candidates. Maximal degree in co-relation 56133. Up to 3276 conditions per place. [2023-08-26 22:12:26,334 INFO L140 encePairwiseOnDemand]: 494/497 looper letters, 282 selfloop transitions, 11 changer transitions 0/296 dead transitions. [2023-08-26 22:12:26,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 296 transitions, 2405 flow [2023-08-26 22:12:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 22:12:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 22:12:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2770 transitions. [2023-08-26 22:12:26,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644533869885983 [2023-08-26 22:12:26,342 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2770 transitions. [2023-08-26 22:12:26,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2770 transitions. [2023-08-26 22:12:26,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:26,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2770 transitions. [2023-08-26 22:12:26,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.83333333333334) internal successors, (2770), 12 states have internal predecessors, (2770), 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) [2023-08-26 22:12:26,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 497.0) internal successors, (6461), 13 states have internal predecessors, (6461), 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) [2023-08-26 22:12:26,363 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 497.0) internal successors, (6461), 13 states have internal predecessors, (6461), 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) [2023-08-26 22:12:26,363 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 243 flow. Second operand 12 states and 2770 transitions. [2023-08-26 22:12:26,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 296 transitions, 2405 flow [2023-08-26 22:12:26,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 296 transitions, 2029 flow, removed 143 selfloop flow, removed 5 redundant places. [2023-08-26 22:12:26,399 INFO L231 Difference]: Finished difference. Result has 78 places, 46 transitions, 291 flow [2023-08-26 22:12:26,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=291, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2023-08-26 22:12:26,401 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2023-08-26 22:12:26,401 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 291 flow [2023-08-26 22:12:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 217.3846153846154) internal successors, (2826), 13 states have internal predecessors, (2826), 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) [2023-08-26 22:12:26,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:26,402 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 22:12:26,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 22:12:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:26,608 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1915454241, now seen corresponding path program 3 times [2023-08-26 22:12:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436204886] [2023-08-26 22:12:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:26,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436204886] [2023-08-26 22:12:26,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436204886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967413055] [2023-08-26 22:12:26,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 22:12:26,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:26,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:26,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:26,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 22:12:26,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 22:12:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:12:26,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 22:12:26,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:27,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967413055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:27,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:27,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-26 22:12:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167847323] [2023-08-26 22:12:27,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:27,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 22:12:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 22:12:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-26 22:12:27,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:12:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 291 flow. Second operand has 25 states, 25 states have (on average 213.4) internal successors, (5335), 25 states have internal predecessors, (5335), 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) [2023-08-26 22:12:27,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:27,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:12:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:32,190 INFO L124 PetriNetUnfolderBase]: 36277/54807 cut-off events. [2023-08-26 22:12:32,190 INFO L125 PetriNetUnfolderBase]: For 217272/217272 co-relation queries the response was YES. [2023-08-26 22:12:32,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142616 conditions, 54807 events. 36277/54807 cut-off events. For 217272/217272 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 361447 event pairs, 2223 based on Foata normal form. 3936/47788 useless extension candidates. Maximal degree in co-relation 142589. Up to 9795 conditions per place. [2023-08-26 22:12:32,654 INFO L140 encePairwiseOnDemand]: 493/497 looper letters, 673 selfloop transitions, 23 changer transitions 0/696 dead transitions. [2023-08-26 22:12:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 696 transitions, 5407 flow [2023-08-26 22:12:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 22:12:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 22:12:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5577 transitions. [2023-08-26 22:12:32,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675553319919517 [2023-08-26 22:12:32,668 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5577 transitions. [2023-08-26 22:12:32,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5577 transitions. [2023-08-26 22:12:32,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:32,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5577 transitions. [2023-08-26 22:12:32,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 232.375) internal successors, (5577), 24 states have internal predecessors, (5577), 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) [2023-08-26 22:12:32,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 497.0) internal successors, (12425), 25 states have internal predecessors, (12425), 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) [2023-08-26 22:12:32,695 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 497.0) internal successors, (12425), 25 states have internal predecessors, (12425), 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) [2023-08-26 22:12:32,695 INFO L175 Difference]: Start difference. First operand has 78 places, 46 transitions, 291 flow. Second operand 24 states and 5577 transitions. [2023-08-26 22:12:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 696 transitions, 5407 flow [2023-08-26 22:12:32,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 696 transitions, 4579 flow, removed 299 selfloop flow, removed 5 redundant places. [2023-08-26 22:12:32,830 INFO L231 Difference]: Finished difference. Result has 108 places, 58 transitions, 447 flow [2023-08-26 22:12:32,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=447, PETRI_PLACES=108, PETRI_TRANSITIONS=58} [2023-08-26 22:12:32,831 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 69 predicate places. [2023-08-26 22:12:32,831 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 58 transitions, 447 flow [2023-08-26 22:12:32,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 213.4) internal successors, (5335), 25 states have internal predecessors, (5335), 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) [2023-08-26 22:12:32,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:32,832 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-26 22:12:32,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 22:12:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:33,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:33,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 723178387, now seen corresponding path program 3 times [2023-08-26 22:12:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023883416] [2023-08-26 22:12:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:33,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023883416] [2023-08-26 22:12:33,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023883416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460012072] [2023-08-26 22:12:33,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 22:12:33,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:33,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:33,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:33,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 22:12:33,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 22:12:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:12:33,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 22:12:33,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:33,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460012072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:33,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:33,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-08-26 22:12:33,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226810398] [2023-08-26 22:12:33,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 22:12:33,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 22:12:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-08-26 22:12:33,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-08-26 22:12:33,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 58 transitions, 447 flow. Second operand has 25 states, 25 states have (on average 217.2) internal successors, (5430), 25 states have internal predecessors, (5430), 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) [2023-08-26 22:12:33,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:33,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-08-26 22:12:33,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:12:42,761 INFO L124 PetriNetUnfolderBase]: 51876/89798 cut-off events. [2023-08-26 22:12:42,762 INFO L125 PetriNetUnfolderBase]: For 337063/337063 co-relation queries the response was YES. [2023-08-26 22:12:43,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228240 conditions, 89798 events. 51876/89798 cut-off events. For 337063/337063 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 773745 event pairs, 2413 based on Foata normal form. 3204/73785 useless extension candidates. Maximal degree in co-relation 228201. Up to 13464 conditions per place. [2023-08-26 22:12:43,741 INFO L140 encePairwiseOnDemand]: 494/497 looper letters, 858 selfloop transitions, 23 changer transitions 0/884 dead transitions. [2023-08-26 22:12:43,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 884 transitions, 8573 flow [2023-08-26 22:12:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 22:12:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 22:12:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5548 transitions. [2023-08-26 22:12:43,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46512407780013415 [2023-08-26 22:12:43,754 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5548 transitions. [2023-08-26 22:12:43,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5548 transitions. [2023-08-26 22:12:43,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:12:43,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5548 transitions. [2023-08-26 22:12:43,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 231.16666666666666) internal successors, (5548), 24 states have internal predecessors, (5548), 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) [2023-08-26 22:12:43,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 497.0) internal successors, (12425), 25 states have internal predecessors, (12425), 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) [2023-08-26 22:12:43,783 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 497.0) internal successors, (12425), 25 states have internal predecessors, (12425), 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) [2023-08-26 22:12:43,783 INFO L175 Difference]: Start difference. First operand has 108 places, 58 transitions, 447 flow. Second operand 24 states and 5548 transitions. [2023-08-26 22:12:43,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 884 transitions, 8573 flow [2023-08-26 22:12:44,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 884 transitions, 6961 flow, removed 575 selfloop flow, removed 11 redundant places. [2023-08-26 22:12:44,035 INFO L231 Difference]: Finished difference. Result has 132 places, 70 transitions, 543 flow [2023-08-26 22:12:44,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=543, PETRI_PLACES=132, PETRI_TRANSITIONS=70} [2023-08-26 22:12:44,036 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 93 predicate places. [2023-08-26 22:12:44,036 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 70 transitions, 543 flow [2023-08-26 22:12:44,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 217.2) internal successors, (5430), 25 states have internal predecessors, (5430), 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) [2023-08-26 22:12:44,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:12:44,037 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1] [2023-08-26 22:12:44,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 22:12:44,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 22:12:44,246 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:12:44,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:12:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1727871329, now seen corresponding path program 4 times [2023-08-26 22:12:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:12:44,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580359666] [2023-08-26 22:12:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:12:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:12:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:12:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:12:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580359666] [2023-08-26 22:12:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580359666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:12:44,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037444043] [2023-08-26 22:12:44,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 22:12:44,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:12:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:12:44,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:12:44,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 22:12:45,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 22:12:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:12:45,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 22:12:45,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:12:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:45,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:12:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:12:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037444043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:12:45,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:12:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-08-26 22:12:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481457731] [2023-08-26 22:12:45,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:12:45,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-26 22:12:45,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:12:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-26 22:12:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-26 22:12:45,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:12:45,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 70 transitions, 543 flow. Second operand has 49 states, 49 states have (on average 213.20408163265307) internal successors, (10447), 49 states have internal predecessors, (10447), 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) [2023-08-26 22:12:45,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:12:45,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:12:45,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:13:13,109 INFO L124 PetriNetUnfolderBase]: 148045/223143 cut-off events. [2023-08-26 22:13:13,109 INFO L125 PetriNetUnfolderBase]: For 4014522/4014522 co-relation queries the response was YES. [2023-08-26 22:13:15,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581942 conditions, 223143 events. 148045/223143 cut-off events. For 4014522/4014522 co-relation queries the response was YES. Maximal size of possible extension queue 1550. Compared 1626350 event pairs, 4587 based on Foata normal form. 16224/194404 useless extension candidates. Maximal degree in co-relation 581891. Up to 40323 conditions per place. [2023-08-26 22:13:16,191 INFO L140 encePairwiseOnDemand]: 493/497 looper letters, 1933 selfloop transitions, 47 changer transitions 0/1980 dead transitions. [2023-08-26 22:13:16,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1980 transitions, 18355 flow [2023-08-26 22:13:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-26 22:13:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-26 22:13:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11169 transitions. [2023-08-26 22:13:16,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681841046277666 [2023-08-26 22:13:16,203 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11169 transitions. [2023-08-26 22:13:16,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11169 transitions. [2023-08-26 22:13:16,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:13:16,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11169 transitions. [2023-08-26 22:13:16,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 232.6875) internal successors, (11169), 48 states have internal predecessors, (11169), 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) [2023-08-26 22:13:16,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 497.0) internal successors, (24353), 49 states have internal predecessors, (24353), 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) [2023-08-26 22:13:16,242 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 497.0) internal successors, (24353), 49 states have internal predecessors, (24353), 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) [2023-08-26 22:13:16,242 INFO L175 Difference]: Start difference. First operand has 132 places, 70 transitions, 543 flow. Second operand 48 states and 11169 transitions. [2023-08-26 22:13:16,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 1980 transitions, 18355 flow [2023-08-26 22:13:17,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 1980 transitions, 14971 flow, removed 1175 selfloop flow, removed 11 redundant places. [2023-08-26 22:13:17,893 INFO L231 Difference]: Finished difference. Result has 192 places, 94 transitions, 855 flow [2023-08-26 22:13:17,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=855, PETRI_PLACES=192, PETRI_TRANSITIONS=94} [2023-08-26 22:13:17,893 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 153 predicate places. [2023-08-26 22:13:17,894 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 94 transitions, 855 flow [2023-08-26 22:13:17,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 213.20408163265307) internal successors, (10447), 49 states have internal predecessors, (10447), 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) [2023-08-26 22:13:17,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:13:17,895 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-08-26 22:13:17,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 22:13:18,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-26 22:13:18,096 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:13:18,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:13:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash 344069907, now seen corresponding path program 4 times [2023-08-26 22:13:18,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:13:18,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337224141] [2023-08-26 22:13:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:13:18,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:13:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:13:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:13:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:13:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337224141] [2023-08-26 22:13:18,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337224141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:13:18,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513635800] [2023-08-26 22:13:18,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 22:13:18,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:13:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:13:18,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:13:18,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 22:13:18,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 22:13:18,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:13:18,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 22:13:18,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:13:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:13:18,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:13:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:13:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513635800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:13:19,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:13:19,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-08-26 22:13:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049803650] [2023-08-26 22:13:19,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:13:19,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-26 22:13:19,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:13:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-26 22:13:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-08-26 22:13:19,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 497 [2023-08-26 22:13:19,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 94 transitions, 855 flow. Second operand has 49 states, 49 states have (on average 217.10204081632654) internal successors, (10638), 49 states have internal predecessors, (10638), 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) [2023-08-26 22:13:19,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:13:19,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 497 [2023-08-26 22:13:19,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 22:14:20,688 INFO L124 PetriNetUnfolderBase]: 208596/360494 cut-off events. [2023-08-26 22:14:20,688 INFO L125 PetriNetUnfolderBase]: For 4360885/4360885 co-relation queries the response was YES. [2023-08-26 22:14:27,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920172 conditions, 360494 events. 208596/360494 cut-off events. For 4360885/4360885 co-relation queries the response was YES. Maximal size of possible extension queue 3083. Compared 3407078 event pairs, 4813 based on Foata normal form. 12744/295629 useless extension candidates. Maximal degree in co-relation 920097. Up to 54576 conditions per place. [2023-08-26 22:14:28,220 INFO L140 encePairwiseOnDemand]: 494/497 looper letters, 2874 selfloop transitions, 47 changer transitions 0/2924 dead transitions. [2023-08-26 22:14:28,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 2924 transitions, 32141 flow [2023-08-26 22:14:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-26 22:14:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-26 22:14:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 11104 transitions. [2023-08-26 22:14:28,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46545942320590206 [2023-08-26 22:14:28,232 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 11104 transitions. [2023-08-26 22:14:28,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 11104 transitions. [2023-08-26 22:14:28,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 22:14:28,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 11104 transitions. [2023-08-26 22:14:28,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 231.33333333333334) internal successors, (11104), 48 states have internal predecessors, (11104), 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) [2023-08-26 22:14:28,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 497.0) internal successors, (24353), 49 states have internal predecessors, (24353), 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) [2023-08-26 22:14:28,265 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 497.0) internal successors, (24353), 49 states have internal predecessors, (24353), 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) [2023-08-26 22:14:28,265 INFO L175 Difference]: Start difference. First operand has 192 places, 94 transitions, 855 flow. Second operand 48 states and 11104 transitions. [2023-08-26 22:14:28,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 2924 transitions, 32141 flow [2023-08-26 22:14:30,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 2924 transitions, 25465 flow, removed 2303 selfloop flow, removed 23 redundant places. [2023-08-26 22:14:30,601 INFO L231 Difference]: Finished difference. Result has 240 places, 118 transitions, 1047 flow [2023-08-26 22:14:30,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=497, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1047, PETRI_PLACES=240, PETRI_TRANSITIONS=118} [2023-08-26 22:14:30,602 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 201 predicate places. [2023-08-26 22:14:30,602 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 118 transitions, 1047 flow [2023-08-26 22:14:30,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 217.10204081632654) internal successors, (10638), 49 states have internal predecessors, (10638), 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) [2023-08-26 22:14:30,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 22:14:30,603 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1] [2023-08-26 22:14:30,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 22:14:30,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 22:14:30,803 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-08-26 22:14:30,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 22:14:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1504541215, now seen corresponding path program 5 times [2023-08-26 22:14:30,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 22:14:30,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126749933] [2023-08-26 22:14:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 22:14:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 22:14:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 22:14:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:14:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 22:14:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126749933] [2023-08-26 22:14:32,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126749933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 22:14:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008681419] [2023-08-26 22:14:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 22:14:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 22:14:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 22:14:32,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 22:14:32,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 22:14:32,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-08-26 22:14:32,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 22:14:32,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-26 22:14:32,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 22:14:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:14:32,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 22:14:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 22:14:34,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008681419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 22:14:34,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 22:14:34,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-08-26 22:14:34,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749134056] [2023-08-26 22:14:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 22:14:34,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-08-26 22:14:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 22:14:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-08-26 22:14:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-08-26 22:14:34,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 497 [2023-08-26 22:14:34,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 118 transitions, 1047 flow. Second operand has 97 states, 97 states have (on average 213.10309278350516) internal successors, (20671), 97 states have internal predecessors, (20671), 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) [2023-08-26 22:14:34,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 22:14:34,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 497 [2023-08-26 22:14:34,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand