/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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/weaver/popl20-difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:02:51,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:02:51,778 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 [2023-08-27 14:02:51,782 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:02:51,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:02:51,802 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:02:51,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:02:51,803 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:02:51,804 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:02:51,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:02:51,805 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:02:51,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:02:51,805 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:02:51,806 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:02:51,806 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:02:51,807 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:02:51,807 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:02:51,807 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:02:51,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:02:51,808 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:02:51,808 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:02:51,808 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:02:51,809 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:02:51,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:02:51,809 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:02:51,809 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:02:51,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:02:51,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:02:51,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:02:51,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:02:51,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:02:51,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:02:51,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:02:51,811 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:02:51,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:02:51,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:02:52,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:02:52,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:02:52,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:02:52,154 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:02:52,154 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:02:52,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-27 14:02:53,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:02:53,705 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:02:53,706 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-27 14:02:53,716 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a196ab7a/64cf52fc3a7841c58e6e68f70d7d960c/FLAG04975155c [2023-08-27 14:02:53,731 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a196ab7a/64cf52fc3a7841c58e6e68f70d7d960c [2023-08-27 14:02:53,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:02:53,734 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:02:53,735 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:02:53,735 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:02:53,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:02:53,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:02:53" (1/1) ... [2023-08-27 14:02:53,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a840aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:53, skipping insertion in model container [2023-08-27 14:02:53,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:02:53" (1/1) ... [2023-08-27 14:02:53,761 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:02:53,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:02:53,957 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:02:53,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:02:54,000 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:02:54,000 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:02:54,007 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:02:54,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54 WrapperNode [2023-08-27 14:02:54,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:02:54,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:02:54,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:02:54,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:02:54,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,058 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-08-27 14:02:54,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:02:54,059 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:02:54,059 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:02:54,059 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:02:54,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:02:54,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:02:54,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:02:54,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:02:54,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (1/1) ... [2023-08-27 14:02:54,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:02:54,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:02:54,129 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) [2023-08-27 14:02:54,138 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 [2023-08-27 14:02:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:02:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:02:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:02:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:02:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:02:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:02:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-27 14:02:54,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:02:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:02:54,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:02:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:02:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:02:54,164 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 14:02:54,249 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:02:54,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:02:54,557 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:02:54,611 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:02:54,611 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 14:02:54,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:02:54 BoogieIcfgContainer [2023-08-27 14:02:54,614 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:02:54,615 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:02:54,615 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:02:54,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:02:54,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:02:53" (1/3) ... [2023-08-27 14:02:54,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755770c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:02:54, skipping insertion in model container [2023-08-27 14:02:54,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:02:54" (2/3) ... [2023-08-27 14:02:54,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755770c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:02:54, skipping insertion in model container [2023-08-27 14:02:54,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:02:54" (3/3) ... [2023-08-27 14:02:54,621 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-27 14:02:54,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:02:54,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-27 14:02:54,636 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:02:54,711 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 14:02:54,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 154 transitions, 340 flow [2023-08-27 14:02:54,795 INFO L124 PetriNetUnfolderBase]: 9/150 cut-off events. [2023-08-27 14:02:54,796 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:02:54,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 150 events. 9/150 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 222 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-08-27 14:02:54,801 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 154 transitions, 340 flow [2023-08-27 14:02:54,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 137 transitions, 298 flow [2023-08-27 14:02:54,809 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:02:54,816 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-27 14:02:54,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-27 14:02:54,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 137 transitions, 298 flow [2023-08-27 14:02:54,845 INFO L124 PetriNetUnfolderBase]: 9/137 cut-off events. [2023-08-27 14:02:54,845 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:02:54,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 9/137 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 103. Up to 2 conditions per place. [2023-08-27 14:02:54,850 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-08-27 14:02:59,018 INFO L134 LiptonReduction]: Checked pairs total: 6533 [2023-08-27 14:02:59,018 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-27 14:02:59,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:02:59,035 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;@2ae5d833, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:02:59,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-27 14:02:59,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:02:59,039 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-08-27 14:02:59,039 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:02:59,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:02:59,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 14:02:59,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:02:59,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:02:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash 19847562, now seen corresponding path program 1 times [2023-08-27 14:02:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:02:59,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529809653] [2023-08-27 14:02:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:02:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:02:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:02:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:02:59,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:02:59,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529809653] [2023-08-27 14:02:59,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529809653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:02:59,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:02:59,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:02:59,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325216586] [2023-08-27 14:02:59,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:02:59,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:02:59,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:02:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:02:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:02:59,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 14:02:59,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-27 14:02:59,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:02:59,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 14:02:59,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:01,513 INFO L124 PetriNetUnfolderBase]: 24773/29661 cut-off events. [2023-08-27 14:03:01,513 INFO L125 PetriNetUnfolderBase]: For 1096/1096 co-relation queries the response was YES. [2023-08-27 14:03:01,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60385 conditions, 29661 events. 24773/29661 cut-off events. For 1096/1096 co-relation queries the response was YES. Maximal size of possible extension queue 1993. Compared 127324 event pairs, 3059 based on Foata normal form. 0/8331 useless extension candidates. Maximal degree in co-relation 55402. Up to 26809 conditions per place. [2023-08-27 14:03:01,726 INFO L140 encePairwiseOnDemand]: 264/276 looper letters, 66 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2023-08-27 14:03:01,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 333 flow [2023-08-27 14:03:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:03:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:03:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-27 14:03:01,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2023-08-27 14:03:01,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-27 14:03:01,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-27 14:03:01,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:01,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-27 14:03:01,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 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) [2023-08-27 14:03:01,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:01,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:01,762 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 3 states and 458 transitions. [2023-08-27 14:03:01,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 333 flow [2023-08-27 14:03:01,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 74 transitions, 303 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 14:03:01,794 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 130 flow [2023-08-27 14:03:01,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-27 14:03:01,798 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-08-27 14:03:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 130 flow [2023-08-27 14:03:01,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-27 14:03:01,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:01,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 14:03:01,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:03:01,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:01,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash 19847635, now seen corresponding path program 1 times [2023-08-27 14:03:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003879497] [2023-08-27 14:03:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:01,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003879497] [2023-08-27 14:03:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003879497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:03:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:03:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:03:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491738399] [2023-08-27 14:03:01,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:03:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:03:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:03:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:03:01,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 14:03:01,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-08-27 14:03:01,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:01,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 14:03:01,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:03,632 INFO L124 PetriNetUnfolderBase]: 22636/27725 cut-off events. [2023-08-27 14:03:03,632 INFO L125 PetriNetUnfolderBase]: For 1875/1903 co-relation queries the response was YES. [2023-08-27 14:03:03,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63766 conditions, 27725 events. 22636/27725 cut-off events. For 1875/1903 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 132033 event pairs, 8316 based on Foata normal form. 0/10138 useless extension candidates. Maximal degree in co-relation 13541. Up to 26389 conditions per place. [2023-08-27 14:03:03,791 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 58 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-27 14:03:03,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 285 flow [2023-08-27 14:03:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:03:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:03:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-27 14:03:03,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2023-08-27 14:03:03,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-27 14:03:03,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-27 14:03:03,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:03,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-27 14:03:03,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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) [2023-08-27 14:03:03,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:03,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:03,798 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 130 flow. Second operand 3 states and 429 transitions. [2023-08-27 14:03:03,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 285 flow [2023-08-27 14:03:03,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:03:03,807 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 131 flow [2023-08-27 14:03:03,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-27 14:03:03,808 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-08-27 14:03:03,810 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 131 flow [2023-08-27 14:03:03,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-08-27 14:03:03,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:03,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:03:03,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 14:03:03,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:03,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 615277717, now seen corresponding path program 1 times [2023-08-27 14:03:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835882537] [2023-08-27 14:03:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835882537] [2023-08-27 14:03:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835882537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:03:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343931308] [2023-08-27 14:03:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:03,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:03:03,914 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) [2023-08-27 14:03:03,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 14:03:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:04,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:03:04,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:03:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:04,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:03:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:04,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343931308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:03:04,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:03:04,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 14:03:04,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014019634] [2023-08-27 14:03:04,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:03:04,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:03:04,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:03:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:03:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 14:03:04,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 123.42857142857143) internal successors, (864), 7 states have internal predecessors, (864), 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) [2023-08-27 14:03:04,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:04,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 14:03:04,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:07,334 INFO L124 PetriNetUnfolderBase]: 55489/65996 cut-off events. [2023-08-27 14:03:07,335 INFO L125 PetriNetUnfolderBase]: For 3179/3179 co-relation queries the response was YES. [2023-08-27 14:03:07,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158439 conditions, 65996 events. 55489/65996 cut-off events. For 3179/3179 co-relation queries the response was YES. Maximal size of possible extension queue 4051. Compared 308144 event pairs, 9357 based on Foata normal form. 0/23674 useless extension candidates. Maximal degree in co-relation 19760. Up to 25362 conditions per place. [2023-08-27 14:03:07,697 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 155 selfloop transitions, 13 changer transitions 0/171 dead transitions. [2023-08-27 14:03:07,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 171 transitions, 796 flow [2023-08-27 14:03:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:03:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:03:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1025 transitions. [2023-08-27 14:03:07,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305383022774327 [2023-08-27 14:03:07,702 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1025 transitions. [2023-08-27 14:03:07,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1025 transitions. [2023-08-27 14:03:07,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:07,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1025 transitions. [2023-08-27 14:03:07,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 146.42857142857142) internal successors, (1025), 7 states have internal predecessors, (1025), 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) [2023-08-27 14:03:07,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 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) [2023-08-27 14:03:07,711 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 276.0) internal successors, (2208), 8 states have internal predecessors, (2208), 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) [2023-08-27 14:03:07,712 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 131 flow. Second operand 7 states and 1025 transitions. [2023-08-27 14:03:07,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 171 transitions, 796 flow [2023-08-27 14:03:07,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 171 transitions, 789 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 14:03:07,728 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 208 flow [2023-08-27 14:03:07,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-08-27 14:03:07,729 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-27 14:03:07,730 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 208 flow [2023-08-27 14:03:07,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.42857142857143) internal successors, (864), 7 states have internal predecessors, (864), 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) [2023-08-27 14:03:07,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:07,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 14:03:07,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 14:03:07,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:07,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:07,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1893741064, now seen corresponding path program 1 times [2023-08-27 14:03:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:07,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135405561] [2023-08-27 14:03:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:08,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135405561] [2023-08-27 14:03:08,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135405561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:03:08,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514539630] [2023-08-27 14:03:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:08,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:03:08,051 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) [2023-08-27 14:03:08,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 14:03:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:08,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 14:03:08,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:03:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:08,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:03:08,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514539630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:03:08,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:03:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-27 14:03:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598881599] [2023-08-27 14:03:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:03:08,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:03:08,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:03:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:03:08,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 14:03:08,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 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) [2023-08-27 14:03:08,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:08,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 14:03:08,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:11,438 INFO L124 PetriNetUnfolderBase]: 52238/62143 cut-off events. [2023-08-27 14:03:11,439 INFO L125 PetriNetUnfolderBase]: For 5675/5675 co-relation queries the response was YES. [2023-08-27 14:03:11,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158401 conditions, 62143 events. 52238/62143 cut-off events. For 5675/5675 co-relation queries the response was YES. Maximal size of possible extension queue 3546. Compared 292760 event pairs, 1706 based on Foata normal form. 1204/27410 useless extension candidates. Maximal degree in co-relation 82996. Up to 38602 conditions per place. [2023-08-27 14:03:11,769 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 106 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2023-08-27 14:03:11,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 117 transitions, 572 flow [2023-08-27 14:03:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:03:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:03:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 722 transitions. [2023-08-27 14:03:11,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231884057971015 [2023-08-27 14:03:11,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 722 transitions. [2023-08-27 14:03:11,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 722 transitions. [2023-08-27 14:03:11,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:11,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 722 transitions. [2023-08-27 14:03:11,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 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) [2023-08-27 14:03:11,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 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) [2023-08-27 14:03:11,779 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 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) [2023-08-27 14:03:11,780 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 208 flow. Second operand 5 states and 722 transitions. [2023-08-27 14:03:11,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 117 transitions, 572 flow [2023-08-27 14:03:11,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 117 transitions, 558 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 14:03:11,888 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 183 flow [2023-08-27 14:03:11,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-27 14:03:11,889 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-27 14:03:11,889 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 183 flow [2023-08-27 14:03:11,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 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) [2023-08-27 14:03:11,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:11,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:03:11,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 14:03:12,095 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,SelfDestructingSolverStorable3 [2023-08-27 14:03:12,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:12,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:12,096 INFO L85 PathProgramCache]: Analyzing trace with hash 615277643, now seen corresponding path program 1 times [2023-08-27 14:03:12,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:12,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426276327] [2023-08-27 14:03:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:12,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:12,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:12,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426276327] [2023-08-27 14:03:12,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426276327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:03:12,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684266023] [2023-08-27 14:03:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:12,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:03:12,147 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) [2023-08-27 14:03:12,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 14:03:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:12,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:03:12,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:03:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:12,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:03:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684266023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:03:12,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:03:12,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 14:03:12,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275949219] [2023-08-27 14:03:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:03:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:03:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:03:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:03:12,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 14:03:12,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-08-27 14:03:12,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:12,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 14:03:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:15,626 INFO L124 PetriNetUnfolderBase]: 56638/68068 cut-off events. [2023-08-27 14:03:15,626 INFO L125 PetriNetUnfolderBase]: For 24805/24805 co-relation queries the response was YES. [2023-08-27 14:03:15,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177355 conditions, 68068 events. 56638/68068 cut-off events. For 24805/24805 co-relation queries the response was YES. Maximal size of possible extension queue 4066. Compared 332321 event pairs, 11001 based on Foata normal form. 0/31373 useless extension candidates. Maximal degree in co-relation 88112. Up to 39065 conditions per place. [2023-08-27 14:03:15,957 INFO L140 encePairwiseOnDemand]: 267/276 looper letters, 74 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-27 14:03:15,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 90 transitions, 500 flow [2023-08-27 14:03:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:03:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:03:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 578 transitions. [2023-08-27 14:03:15,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235507246376812 [2023-08-27 14:03:15,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 578 transitions. [2023-08-27 14:03:15,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 578 transitions. [2023-08-27 14:03:15,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:15,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 578 transitions. [2023-08-27 14:03:15,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 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) [2023-08-27 14:03:15,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 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) [2023-08-27 14:03:15,962 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 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) [2023-08-27 14:03:15,962 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 183 flow. Second operand 4 states and 578 transitions. [2023-08-27 14:03:15,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 90 transitions, 500 flow [2023-08-27 14:03:16,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 90 transitions, 482 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:03:16,117 INFO L231 Difference]: Finished difference. Result has 57 places, 59 transitions, 294 flow [2023-08-27 14:03:16,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=57, PETRI_TRANSITIONS=59} [2023-08-27 14:03:16,118 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-27 14:03:16,118 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 59 transitions, 294 flow [2023-08-27 14:03:16,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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) [2023-08-27 14:03:16,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:16,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:03:16,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 14:03:16,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:16,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:16,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash 615277644, now seen corresponding path program 1 times [2023-08-27 14:03:16,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:16,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308089348] [2023-08-27 14:03:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:16,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:16,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308089348] [2023-08-27 14:03:16,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308089348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:03:16,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751102103] [2023-08-27 14:03:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:16,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:03:16,355 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) [2023-08-27 14:03:16,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 14:03:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:16,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:03:16,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:03:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:16,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:03:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751102103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:03:16,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:03:16,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:03:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884649637] [2023-08-27 14:03:16,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:03:16,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:03:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:03:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:03:16,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 14:03:16,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 59 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 127.57142857142857) internal successors, (893), 7 states have internal predecessors, (893), 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) [2023-08-27 14:03:16,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:16,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 14:03:16,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:22,385 INFO L124 PetriNetUnfolderBase]: 89795/108347 cut-off events. [2023-08-27 14:03:22,387 INFO L125 PetriNetUnfolderBase]: For 70341/70341 co-relation queries the response was YES. [2023-08-27 14:03:22,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317506 conditions, 108347 events. 89795/108347 cut-off events. For 70341/70341 co-relation queries the response was YES. Maximal size of possible extension queue 5852. Compared 553984 event pairs, 8873 based on Foata normal form. 10399/62884 useless extension candidates. Maximal degree in co-relation 77568. Up to 31703 conditions per place. [2023-08-27 14:03:22,913 INFO L140 encePairwiseOnDemand]: 268/276 looper letters, 171 selfloop transitions, 29 changer transitions 0/204 dead transitions. [2023-08-27 14:03:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 204 transitions, 1242 flow [2023-08-27 14:03:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:03:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:03:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 933 transitions. [2023-08-27 14:03:22,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634057971014492 [2023-08-27 14:03:22,915 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 933 transitions. [2023-08-27 14:03:22,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 933 transitions. [2023-08-27 14:03:22,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:22,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 933 transitions. [2023-08-27 14:03:22,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.5) internal successors, (933), 6 states have internal predecessors, (933), 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) [2023-08-27 14:03:22,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 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) [2023-08-27 14:03:22,920 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 276.0) internal successors, (1932), 7 states have internal predecessors, (1932), 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) [2023-08-27 14:03:22,921 INFO L175 Difference]: Start difference. First operand has 57 places, 59 transitions, 294 flow. Second operand 6 states and 933 transitions. [2023-08-27 14:03:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 204 transitions, 1242 flow [2023-08-27 14:03:23,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 204 transitions, 1163 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-27 14:03:23,148 INFO L231 Difference]: Finished difference. Result has 65 places, 80 transitions, 586 flow [2023-08-27 14:03:23,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=65, PETRI_TRANSITIONS=80} [2023-08-27 14:03:23,149 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-08-27 14:03:23,149 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 80 transitions, 586 flow [2023-08-27 14:03:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.57142857142857) internal successors, (893), 7 states have internal predecessors, (893), 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) [2023-08-27 14:03:23,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:23,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:03:23,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 14:03:23,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:23,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:23,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -552522556, now seen corresponding path program 1 times [2023-08-27 14:03:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192889789] [2023-08-27 14:03:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:23,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192889789] [2023-08-27 14:03:23,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192889789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:03:23,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:03:23,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:03:23,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339923755] [2023-08-27 14:03:23,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:03:23,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:03:23,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:03:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:03:23,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 14:03:23,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 80 transitions, 586 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2023-08-27 14:03:23,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:23,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 14:03:23,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:29,792 INFO L124 PetriNetUnfolderBase]: 91989/112043 cut-off events. [2023-08-27 14:03:29,792 INFO L125 PetriNetUnfolderBase]: For 140164/140164 co-relation queries the response was YES. [2023-08-27 14:03:30,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340869 conditions, 112043 events. 91989/112043 cut-off events. For 140164/140164 co-relation queries the response was YES. Maximal size of possible extension queue 6042. Compared 591906 event pairs, 16988 based on Foata normal form. 0/55671 useless extension candidates. Maximal degree in co-relation 164732. Up to 100116 conditions per place. [2023-08-27 14:03:30,480 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 107 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2023-08-27 14:03:30,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 988 flow [2023-08-27 14:03:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:03:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:03:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-27 14:03:30,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5205314009661836 [2023-08-27 14:03:30,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-27 14:03:30,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-27 14:03:30,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:30,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-27 14:03:30,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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) [2023-08-27 14:03:30,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:30,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:30,486 INFO L175 Difference]: Start difference. First operand has 65 places, 80 transitions, 586 flow. Second operand 3 states and 431 transitions. [2023-08-27 14:03:30,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 988 flow [2023-08-27 14:03:37,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 940 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-08-27 14:03:37,741 INFO L231 Difference]: Finished difference. Result has 68 places, 84 transitions, 615 flow [2023-08-27 14:03:37,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=615, PETRI_PLACES=68, PETRI_TRANSITIONS=84} [2023-08-27 14:03:37,741 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-27 14:03:37,742 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 84 transitions, 615 flow [2023-08-27 14:03:37,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2023-08-27 14:03:37,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:37,742 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-27 14:03:37,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 14:03:37,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:37,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1180927405, now seen corresponding path program 2 times [2023-08-27 14:03:37,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:37,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607351340] [2023-08-27 14:03:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:37,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:37,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607351340] [2023-08-27 14:03:37,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607351340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:03:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779457494] [2023-08-27 14:03:37,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:03:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:03:37,804 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) [2023-08-27 14:03:37,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 14:03:37,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:03:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:03:37,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:03:37,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:03:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 14:03:37,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:03:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779457494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:03:37,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:03:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-27 14:03:37,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774920166] [2023-08-27 14:03:37,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:03:37,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:03:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:03:37,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:03:37,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 14:03:37,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 84 transitions, 615 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-08-27 14:03:37,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:37,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 14:03:37,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:41,893 INFO L124 PetriNetUnfolderBase]: 59879/73076 cut-off events. [2023-08-27 14:03:41,893 INFO L125 PetriNetUnfolderBase]: For 125810/128042 co-relation queries the response was YES. [2023-08-27 14:03:42,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228157 conditions, 73076 events. 59879/73076 cut-off events. For 125810/128042 co-relation queries the response was YES. Maximal size of possible extension queue 4158. Compared 374167 event pairs, 29340 based on Foata normal form. 4875/41970 useless extension candidates. Maximal degree in co-relation 125266. Up to 72882 conditions per place. [2023-08-27 14:03:42,306 INFO L140 encePairwiseOnDemand]: 273/276 looper letters, 71 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-27 14:03:42,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 676 flow [2023-08-27 14:03:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:03:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:03:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-27 14:03:42,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867149758454106 [2023-08-27 14:03:42,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-27 14:03:42,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-27 14:03:42,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:42,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-27 14:03:42,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2023-08-27 14:03:42,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:42,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:03:42,310 INFO L175 Difference]: Start difference. First operand has 68 places, 84 transitions, 615 flow. Second operand 3 states and 403 transitions. [2023-08-27 14:03:42,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 676 flow [2023-08-27 14:03:44,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 650 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 14:03:44,225 INFO L231 Difference]: Finished difference. Result has 64 places, 76 transitions, 508 flow [2023-08-27 14:03:44,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=508, PETRI_PLACES=64, PETRI_TRANSITIONS=76} [2023-08-27 14:03:44,226 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-27 14:03:44,226 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 76 transitions, 508 flow [2023-08-27 14:03:44,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-08-27 14:03:44,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:03:44,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-27 14:03:44,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 14:03:44,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:44,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:03:44,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:03:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1180927478, now seen corresponding path program 2 times [2023-08-27 14:03:44,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:03:44,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661917053] [2023-08-27 14:03:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:03:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:03:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:03:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:03:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661917053] [2023-08-27 14:03:44,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661917053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:03:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098855438] [2023-08-27 14:03:44,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:03:44,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:03:44,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:03:44,513 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) [2023-08-27 14:03:44,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 14:03:44,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:03:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:03:44,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 14:03:44,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:03:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:44,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:03:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:03:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098855438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:03:44,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:03:44,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 14:03:44,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933101618] [2023-08-27 14:03:44,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:03:44,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:03:44,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:03:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:03:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:03:44,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 14:03:44,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 76 transitions, 508 flow. Second operand has 13 states, 13 states have (on average 127.3076923076923) internal successors, (1655), 13 states have internal predecessors, (1655), 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) [2023-08-27 14:03:44,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:03:44,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 14:03:44,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:03:56,614 INFO L124 PetriNetUnfolderBase]: 170313/208245 cut-off events. [2023-08-27 14:03:56,614 INFO L125 PetriNetUnfolderBase]: For 308892/314170 co-relation queries the response was YES. [2023-08-27 14:03:57,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609929 conditions, 208245 events. 170313/208245 cut-off events. For 308892/314170 co-relation queries the response was YES. Maximal size of possible extension queue 9065. Compared 1164938 event pairs, 13027 based on Foata normal form. 17849/118972 useless extension candidates. Maximal degree in co-relation 609911. Up to 39067 conditions per place. [2023-08-27 14:03:58,077 INFO L140 encePairwiseOnDemand]: 269/276 looper letters, 339 selfloop transitions, 106 changer transitions 0/449 dead transitions. [2023-08-27 14:03:58,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 449 transitions, 3031 flow [2023-08-27 14:03:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:03:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:03:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1877 transitions. [2023-08-27 14:03:58,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5667270531400966 [2023-08-27 14:03:58,082 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1877 transitions. [2023-08-27 14:03:58,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1877 transitions. [2023-08-27 14:03:58,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:03:58,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1877 transitions. [2023-08-27 14:03:58,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 156.41666666666666) internal successors, (1877), 12 states have internal predecessors, (1877), 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) [2023-08-27 14:03:58,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 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) [2023-08-27 14:03:58,092 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 276.0) internal successors, (3588), 13 states have internal predecessors, (3588), 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) [2023-08-27 14:03:58,092 INFO L175 Difference]: Start difference. First operand has 64 places, 76 transitions, 508 flow. Second operand 12 states and 1877 transitions. [2023-08-27 14:03:58,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 449 transitions, 3031 flow [2023-08-27 14:04:07,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 449 transitions, 3030 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:04:07,899 INFO L231 Difference]: Finished difference. Result has 84 places, 163 transitions, 1933 flow [2023-08-27 14:04:07,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1933, PETRI_PLACES=84, PETRI_TRANSITIONS=163} [2023-08-27 14:04:07,900 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2023-08-27 14:04:07,900 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 163 transitions, 1933 flow [2023-08-27 14:04:07,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 127.3076923076923) internal successors, (1655), 13 states have internal predecessors, (1655), 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) [2023-08-27 14:04:07,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:04:07,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:04:07,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 14:04:08,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:04:08,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:04:08,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:04:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash -547486176, now seen corresponding path program 1 times [2023-08-27 14:04:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:04:08,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968491628] [2023-08-27 14:04:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:04:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:04:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:04:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:04:08,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:04:08,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968491628] [2023-08-27 14:04:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968491628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:04:08,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:04:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:04:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427019695] [2023-08-27 14:04:08,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:04:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:04:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:04:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:04:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:04:08,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 14:04:08,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 163 transitions, 1933 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-27 14:04:08,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:04:08,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 14:04:08,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:04:21,113 INFO L124 PetriNetUnfolderBase]: 139801/176748 cut-off events. [2023-08-27 14:04:21,113 INFO L125 PetriNetUnfolderBase]: For 718082/723202 co-relation queries the response was YES. [2023-08-27 14:04:21,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627897 conditions, 176748 events. 139801/176748 cut-off events. For 718082/723202 co-relation queries the response was YES. Maximal size of possible extension queue 8123. Compared 1036024 event pairs, 20649 based on Foata normal form. 5113/101468 useless extension candidates. Maximal degree in co-relation 627868. Up to 157589 conditions per place. [2023-08-27 14:04:22,676 INFO L140 encePairwiseOnDemand]: 267/276 looper letters, 303 selfloop transitions, 3 changer transitions 0/310 dead transitions. [2023-08-27 14:04:22,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 310 transitions, 4429 flow [2023-08-27 14:04:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:04:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:04:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-27 14:04:22,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533816425120773 [2023-08-27 14:04:22,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-27 14:04:22,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-27 14:04:22,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:04:22,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-27 14:04:22,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:04:22,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:04:22,681 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:04:22,681 INFO L175 Difference]: Start difference. First operand has 84 places, 163 transitions, 1933 flow. Second operand 3 states and 442 transitions. [2023-08-27 14:04:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 310 transitions, 4429 flow [2023-08-27 14:04:29,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 310 transitions, 3937 flow, removed 246 selfloop flow, removed 0 redundant places. [2023-08-27 14:04:29,124 INFO L231 Difference]: Finished difference. Result has 87 places, 165 transitions, 1716 flow [2023-08-27 14:04:29,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1716, PETRI_PLACES=87, PETRI_TRANSITIONS=165} [2023-08-27 14:04:29,125 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2023-08-27 14:04:29,125 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 165 transitions, 1716 flow [2023-08-27 14:04:29,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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) [2023-08-27 14:04:29,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:04:29,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:04:29,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 14:04:29,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:04:29,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:04:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash -547486132, now seen corresponding path program 1 times [2023-08-27 14:04:29,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:04:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696205688] [2023-08-27 14:04:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:04:29,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:04:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:04:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:04:29,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:04:29,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696205688] [2023-08-27 14:04:29,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696205688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:04:29,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:04:29,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:04:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958466395] [2023-08-27 14:04:29,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:04:29,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:04:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:04:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:04:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:04:29,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 276 [2023-08-27 14:04:29,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 165 transitions, 1716 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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) [2023-08-27 14:04:29,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:04:29,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 276 [2023-08-27 14:04:29,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:04:43,626 INFO L124 PetriNetUnfolderBase]: 144197/183584 cut-off events. [2023-08-27 14:04:43,626 INFO L125 PetriNetUnfolderBase]: For 433990/439961 co-relation queries the response was YES. [2023-08-27 14:04:44,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687079 conditions, 183584 events. 144197/183584 cut-off events. For 433990/439961 co-relation queries the response was YES. Maximal size of possible extension queue 8234. Compared 1148981 event pairs, 82615 based on Foata normal form. 5439/127984 useless extension candidates. Maximal degree in co-relation 687047. Up to 173849 conditions per place. [2023-08-27 14:04:45,201 INFO L140 encePairwiseOnDemand]: 272/276 looper letters, 299 selfloop transitions, 3 changer transitions 0/305 dead transitions. [2023-08-27 14:04:45,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 305 transitions, 3939 flow [2023-08-27 14:04:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:04:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:04:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-27 14:04:45,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084541062801933 [2023-08-27 14:04:45,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-27 14:04:45,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-27 14:04:45,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:04:45,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-27 14:04:45,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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) [2023-08-27 14:04:45,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:04:45,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 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) [2023-08-27 14:04:45,205 INFO L175 Difference]: Start difference. First operand has 87 places, 165 transitions, 1716 flow. Second operand 3 states and 421 transitions. [2023-08-27 14:04:45,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 305 transitions, 3939 flow [2023-08-27 14:05:01,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 305 transitions, 3917 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-27 14:05:01,797 INFO L231 Difference]: Finished difference. Result has 89 places, 165 transitions, 1712 flow [2023-08-27 14:05:01,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1712, PETRI_PLACES=89, PETRI_TRANSITIONS=165} [2023-08-27 14:05:01,797 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2023-08-27 14:05:01,798 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 165 transitions, 1712 flow [2023-08-27 14:05:01,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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) [2023-08-27 14:05:01,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:05:01,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:05:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 14:05:01,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 14:05:01,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:05:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 207800408, now seen corresponding path program 1 times [2023-08-27 14:05:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:05:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687232240] [2023-08-27 14:05:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:05:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:05:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:05:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:05:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:05:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687232240] [2023-08-27 14:05:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687232240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:05:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520904070] [2023-08-27 14:05:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:05:01,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:05:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:05:01,843 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) [2023-08-27 14:05:01,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 14:05:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:05:01,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:05:01,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:05:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:05:01,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:05:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:05:01,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520904070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:05:01,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:05:01,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:05:01,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250838193] [2023-08-27 14:05:01,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:05:01,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:05:01,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:05:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:05:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:05:01,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 276 [2023-08-27 14:05:01,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 165 transitions, 1712 flow. Second operand has 7 states, 7 states have (on average 129.28571428571428) internal successors, (905), 7 states have internal predecessors, (905), 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) [2023-08-27 14:05:01,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:05:01,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 276 [2023-08-27 14:05:01,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand