/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 INSUFFICIENT_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/pthread-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 09:08:24,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 09:08:24,522 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 09:08:24,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 09:08:24,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 09:08:24,559 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 09:08:24,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 09:08:24,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 09:08:24,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 09:08:24,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 09:08:24,568 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 09:08:24,568 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 09:08:24,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 09:08:24,570 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 09:08:24,570 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 09:08:24,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 09:08:24,571 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 09:08:24,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 09:08:24,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 09:08:24,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 09:08:24,571 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 09:08:24,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 09:08:24,572 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 09:08:24,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 09:08:24,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 09:08:24,573 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 09:08:24,573 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 09:08:24,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:08:24,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 09:08:24,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 09:08:24,575 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 09:08:24,575 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 09:08:24,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 09:08:24,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 09:08:24,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 09:08:24,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 09:08:24,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 09:08:24,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 09:08:24,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 09:08:24,891 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 09:08:24,891 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 09:08:24,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-27 09:08:26,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 09:08:26,365 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 09:08:26,366 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-27 09:08:26,377 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2adf5ceb/0301057250424c9eaf6f9cba3f27ab48/FLAG2078874d5 [2023-08-27 09:08:26,395 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2adf5ceb/0301057250424c9eaf6f9cba3f27ab48 [2023-08-27 09:08:26,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 09:08:26,398 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 09:08:26,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 09:08:26,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 09:08:26,401 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 09:08:26,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f753d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26, skipping insertion in model container [2023-08-27 09:08:26,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,430 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 09:08:26,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:08:26,730 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 09:08:26,753 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [208] [2023-08-27 09:08:26,754 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [209] [2023-08-27 09:08:26,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:08:26,812 INFO L206 MainTranslator]: Completed translation [2023-08-27 09:08:26,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26 WrapperNode [2023-08-27 09:08:26,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 09:08:26,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 09:08:26,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 09:08:26,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 09:08:26,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,844 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,883 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 145 [2023-08-27 09:08:26,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 09:08:26,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 09:08:26,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 09:08:26,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 09:08:26,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,910 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,913 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,914 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,927 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 09:08:26,928 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 09:08:26,928 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 09:08:26,928 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 09:08:26,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (1/1) ... [2023-08-27 09:08:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:08:26,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:26,962 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 09:08:26,976 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 09:08:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 09:08:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-27 09:08:27,002 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-27 09:08:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-27 09:08:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-27 09:08:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 09:08:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 09:08:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 09:08:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 09:08:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 09:08:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-27 09:08:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 09:08:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 09:08:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 09:08:27,005 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 09:08:27,147 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 09:08:27,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 09:08:27,342 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 09:08:27,349 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 09:08:27,350 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 09:08:27,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:08:27 BoogieIcfgContainer [2023-08-27 09:08:27,352 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 09:08:27,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 09:08:27,354 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 09:08:27,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 09:08:27,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:08:26" (1/3) ... [2023-08-27 09:08:27,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719024e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:08:27, skipping insertion in model container [2023-08-27 09:08:27,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:08:26" (2/3) ... [2023-08-27 09:08:27,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719024e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:08:27, skipping insertion in model container [2023-08-27 09:08:27,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:08:27" (3/3) ... [2023-08-27 09:08:27,358 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-08-27 09:08:27,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 09:08:27,372 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-27 09:08:27,372 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 09:08:27,488 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 09:08:27,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 156 transitions, 328 flow [2023-08-27 09:08:27,576 INFO L124 PetriNetUnfolderBase]: 12/154 cut-off events. [2023-08-27 09:08:27,576 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 09:08:27,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 154 events. 12/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 315 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-27 09:08:27,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 156 transitions, 328 flow [2023-08-27 09:08:27,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 145 transitions, 299 flow [2023-08-27 09:08:27,592 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:08:27,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 145 transitions, 299 flow [2023-08-27 09:08:27,613 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 145 transitions, 299 flow [2023-08-27 09:08:27,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 145 transitions, 299 flow [2023-08-27 09:08:27,648 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-08-27 09:08:27,648 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 09:08:27,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 145 events. 12/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 297 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-27 09:08:27,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 5392 [2023-08-27 09:08:32,525 INFO L134 LiptonReduction]: Checked pairs total: 11407 [2023-08-27 09:08:32,526 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-27 09:08:32,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:08:32,542 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;@1b52bfd0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:08:32,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-27 09:08:32,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:08:32,547 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-08-27 09:08:32,548 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 09:08:32,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:32,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:32,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:32,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash 475493111, now seen corresponding path program 1 times [2023-08-27 09:08:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094722711] [2023-08-27 09:08:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:32,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:32,803 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 09:08:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094722711] [2023-08-27 09:08:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094722711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846908547] [2023-08-27 09:08:32,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:32,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:32,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:32,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:32,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:32,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-27 09:08:32,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 09:08:32,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:32,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-27 09:08:32,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:33,107 INFO L124 PetriNetUnfolderBase]: 1019/1672 cut-off events. [2023-08-27 09:08:33,107 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-27 09:08:33,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 1672 events. 1019/1672 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8531 event pairs, 465 based on Foata normal form. 0/1162 useless extension candidates. Maximal degree in co-relation 3168. Up to 937 conditions per place. [2023-08-27 09:08:33,122 INFO L140 encePairwiseOnDemand]: 284/290 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-27 09:08:33,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 260 flow [2023-08-27 09:08:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-27 09:08:33,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471264367816092 [2023-08-27 09:08:33,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-27 09:08:33,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-27 09:08:33,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:33,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-27 09:08:33,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:33,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:33,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:33,160 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 89 flow. Second operand 3 states and 476 transitions. [2023-08-27 09:08:33,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 260 flow [2023-08-27 09:08:33,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 09:08:33,166 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 96 flow [2023-08-27 09:08:33,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-27 09:08:33,172 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-27 09:08:33,173 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 96 flow [2023-08-27 09:08:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 09:08:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:33,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 09:08:33,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:33,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:33,175 INFO L85 PathProgramCache]: Analyzing trace with hash 475578292, now seen corresponding path program 1 times [2023-08-27 09:08:33,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:33,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140417937] [2023-08-27 09:08:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:33,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:33,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:33,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137556753] [2023-08-27 09:08:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:33,226 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 09:08:33,268 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 09:08:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:33,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:08:33,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:33,422 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 09:08:33,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:33,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140417937] [2023-08-27 09:08:33,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137556753] [2023-08-27 09:08:33,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137556753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:33,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:33,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22696058] [2023-08-27 09:08:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:33,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:33,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 290 [2023-08-27 09:08:33,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 09:08:33,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:33,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 290 [2023-08-27 09:08:33,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:33,624 INFO L124 PetriNetUnfolderBase]: 939/1530 cut-off events. [2023-08-27 09:08:33,624 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-08-27 09:08:33,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3181 conditions, 1530 events. 939/1530 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7321 event pairs, 717 based on Foata normal form. 0/1110 useless extension candidates. Maximal degree in co-relation 2790. Up to 1424 conditions per place. [2023-08-27 09:08:33,634 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 33 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-27 09:08:33,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 162 flow [2023-08-27 09:08:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-27 09:08:33,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908045977011494 [2023-08-27 09:08:33,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-27 09:08:33,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-27 09:08:33,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:33,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-27 09:08:33,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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 09:08:33,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:33,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:33,644 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 96 flow. Second operand 3 states and 427 transitions. [2023-08-27 09:08:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 162 flow [2023-08-27 09:08:33,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:33,651 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 94 flow [2023-08-27 09:08:33,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-27 09:08:33,651 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-08-27 09:08:33,652 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 94 flow [2023-08-27 09:08:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 09:08:33,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:33,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:33,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:33,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:33,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:33,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:33,859 INFO L85 PathProgramCache]: Analyzing trace with hash -646915373, now seen corresponding path program 1 times [2023-08-27 09:08:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:33,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094213062] [2023-08-27 09:08:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:33,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:33,961 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 09:08:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:33,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094213062] [2023-08-27 09:08:33,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094213062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:33,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:33,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301188286] [2023-08-27 09:08:33,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:33,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:33,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:33,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-27 09:08:33,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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 09:08:33,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:33,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-27 09:08:33,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:34,137 INFO L124 PetriNetUnfolderBase]: 1116/1891 cut-off events. [2023-08-27 09:08:34,137 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-08-27 09:08:34,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 1891 events. 1116/1891 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9675 event pairs, 519 based on Foata normal form. 0/1389 useless extension candidates. Maximal degree in co-relation 3995. Up to 908 conditions per place. [2023-08-27 09:08:34,148 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 58 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-27 09:08:34,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 281 flow [2023-08-27 09:08:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-27 09:08:34,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2023-08-27 09:08:34,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-27 09:08:34,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-27 09:08:34,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:34,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-27 09:08:34,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 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 09:08:34,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:34,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:34,154 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 3 states and 474 transitions. [2023-08-27 09:08:34,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 281 flow [2023-08-27 09:08:34,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:34,157 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 108 flow [2023-08-27 09:08:34,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-27 09:08:34,158 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-27 09:08:34,158 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 108 flow [2023-08-27 09:08:34,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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 09:08:34,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:34,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 09:08:34,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:34,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash -646952037, now seen corresponding path program 1 times [2023-08-27 09:08:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:34,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696028396] [2023-08-27 09:08:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:34,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:34,262 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 09:08:34,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:34,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696028396] [2023-08-27 09:08:34,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696028396] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:34,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:34,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:34,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181840972] [2023-08-27 09:08:34,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:34,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:34,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 290 [2023-08-27 09:08:34,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 09:08:34,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 290 [2023-08-27 09:08:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:34,538 INFO L124 PetriNetUnfolderBase]: 1715/2916 cut-off events. [2023-08-27 09:08:34,538 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-08-27 09:08:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6214 conditions, 2916 events. 1715/2916 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16204 event pairs, 872 based on Foata normal form. 0/2306 useless extension candidates. Maximal degree in co-relation 6205. Up to 1748 conditions per place. [2023-08-27 09:08:34,555 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 58 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-27 09:08:34,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 65 transitions, 298 flow [2023-08-27 09:08:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-27 09:08:34,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539080459770115 [2023-08-27 09:08:34,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-27 09:08:34,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-27 09:08:34,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:34,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-27 09:08:34,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 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 09:08:34,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:34,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:34,561 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 108 flow. Second operand 3 states and 469 transitions. [2023-08-27 09:08:34,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 65 transitions, 298 flow [2023-08-27 09:08:34,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:34,566 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 121 flow [2023-08-27 09:08:34,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-27 09:08:34,567 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-27 09:08:34,567 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 121 flow [2023-08-27 09:08:34,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 09:08:34,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:34,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 09:08:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 09:08:34,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:34,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1925776729, now seen corresponding path program 1 times [2023-08-27 09:08:34,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721825315] [2023-08-27 09:08:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721825315] [2023-08-27 09:08:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721825315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:34,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:34,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287172515] [2023-08-27 09:08:34,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:34,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:34,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:34,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:34,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:34,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-27 09:08:34,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 09:08:34,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:34,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-27 09:08:34,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:34,884 INFO L124 PetriNetUnfolderBase]: 1577/2624 cut-off events. [2023-08-27 09:08:34,884 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2023-08-27 09:08:34,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6019 conditions, 2624 events. 1577/2624 cut-off events. For 567/567 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13766 event pairs, 477 based on Foata normal form. 0/2200 useless extension candidates. Maximal degree in co-relation 6009. Up to 2418 conditions per place. [2023-08-27 09:08:34,898 INFO L140 encePairwiseOnDemand]: 288/290 looper letters, 44 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-27 09:08:34,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 245 flow [2023-08-27 09:08:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-27 09:08:34,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218390804597701 [2023-08-27 09:08:34,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-27 09:08:34,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-27 09:08:34,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:34,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-27 09:08:34,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 09:08:34,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:34,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:34,904 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 121 flow. Second operand 3 states and 454 transitions. [2023-08-27 09:08:34,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 245 flow [2023-08-27 09:08:34,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:34,907 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 117 flow [2023-08-27 09:08:34,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-27 09:08:34,909 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-27 09:08:34,909 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 117 flow [2023-08-27 09:08:34,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 09:08:34,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:34,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 09:08:34,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 09:08:34,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:34,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:34,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1925776805, now seen corresponding path program 1 times [2023-08-27 09:08:34,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:34,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443056821] [2023-08-27 09:08:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:08:34,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:34,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443056821] [2023-08-27 09:08:34,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443056821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:34,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:34,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:34,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798824014] [2023-08-27 09:08:34,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:34,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:34,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:34,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 290 [2023-08-27 09:08:34,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 09:08:34,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:34,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 290 [2023-08-27 09:08:34,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:35,179 INFO L124 PetriNetUnfolderBase]: 1453/2474 cut-off events. [2023-08-27 09:08:35,179 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2023-08-27 09:08:35,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5541 conditions, 2474 events. 1453/2474 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13529 event pairs, 351 based on Foata normal form. 0/2138 useless extension candidates. Maximal degree in co-relation 5531. Up to 1698 conditions per place. [2023-08-27 09:08:35,193 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 46 selfloop transitions, 4 changer transitions 1/56 dead transitions. [2023-08-27 09:08:35,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 269 flow [2023-08-27 09:08:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-27 09:08:35,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-27 09:08:35,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-27 09:08:35,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-27 09:08:35,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:35,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-27 09:08:35,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:35,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:35,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:35,200 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 117 flow. Second operand 3 states and 460 transitions. [2023-08-27 09:08:35,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 269 flow [2023-08-27 09:08:35,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:35,203 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 128 flow [2023-08-27 09:08:35,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-27 09:08:35,205 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-08-27 09:08:35,205 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 128 flow [2023-08-27 09:08:35,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 09:08:35,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:35,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 09:08:35,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:35,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash -783258015, now seen corresponding path program 1 times [2023-08-27 09:08:35,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:35,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381838857] [2023-08-27 09:08:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:35,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:08:35,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381838857] [2023-08-27 09:08:35,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381838857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:35,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:35,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:35,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629846182] [2023-08-27 09:08:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:35,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:35,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 290 [2023-08-27 09:08:35,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 09:08:35,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:35,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 290 [2023-08-27 09:08:35,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:35,473 INFO L124 PetriNetUnfolderBase]: 1380/2377 cut-off events. [2023-08-27 09:08:35,473 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2023-08-27 09:08:35,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2377 events. 1380/2377 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12485 event pairs, 250 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 5553. Up to 1582 conditions per place. [2023-08-27 09:08:35,487 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 46 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-08-27 09:08:35,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 282 flow [2023-08-27 09:08:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-27 09:08:35,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218390804597701 [2023-08-27 09:08:35,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-27 09:08:35,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-27 09:08:35,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:35,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-27 09:08:35,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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 09:08:35,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:35,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:35,492 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 128 flow. Second operand 3 states and 454 transitions. [2023-08-27 09:08:35,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 282 flow [2023-08-27 09:08:35,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:35,495 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 136 flow [2023-08-27 09:08:35,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-27 09:08:35,495 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-27 09:08:35,496 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 136 flow [2023-08-27 09:08:35,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 09:08:35,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:35,496 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:35,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 09:08:35,496 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:35,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -783258103, now seen corresponding path program 1 times [2023-08-27 09:08:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:35,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420031573] [2023-08-27 09:08:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:35,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:35,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:35,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420031573] [2023-08-27 09:08:35,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420031573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:08:35,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793868100] [2023-08-27 09:08:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:35,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:35,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:35,547 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 09:08:35,572 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 09:08:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:35,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:08:35,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:08:35,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793868100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:35,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 09:08:35,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 09:08:35,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687278391] [2023-08-27 09:08:35,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:35,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:35,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:08:35,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 290 [2023-08-27 09:08:35,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 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 09:08:35,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:35,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 290 [2023-08-27 09:08:35,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:35,922 INFO L124 PetriNetUnfolderBase]: 1288/2211 cut-off events. [2023-08-27 09:08:35,922 INFO L125 PetriNetUnfolderBase]: For 1500/1500 co-relation queries the response was YES. [2023-08-27 09:08:35,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5476 conditions, 2211 events. 1288/2211 cut-off events. For 1500/1500 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11291 event pairs, 83 based on Foata normal form. 58/2063 useless extension candidates. Maximal degree in co-relation 5465. Up to 1004 conditions per place. [2023-08-27 09:08:35,940 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 70 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-27 09:08:35,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 77 transitions, 398 flow [2023-08-27 09:08:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:08:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:08:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-27 09:08:35,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267241379310345 [2023-08-27 09:08:35,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-27 09:08:35,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-27 09:08:35,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:35,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-27 09:08:35,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 09:08:35,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 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 09:08:35,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 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 09:08:35,946 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 136 flow. Second operand 4 states and 611 transitions. [2023-08-27 09:08:35,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 77 transitions, 398 flow [2023-08-27 09:08:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 77 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:35,950 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 132 flow [2023-08-27 09:08:35,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-27 09:08:35,952 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2023-08-27 09:08:35,952 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 132 flow [2023-08-27 09:08:35,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 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 09:08:35,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:35,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:35,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:36,160 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,SelfDestructingSolverStorable7 [2023-08-27 09:08:36,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:36,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -967571044, now seen corresponding path program 1 times [2023-08-27 09:08:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286389018] [2023-08-27 09:08:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:36,231 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 09:08:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:36,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286389018] [2023-08-27 09:08:36,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286389018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:36,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930542713] [2023-08-27 09:08:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:36,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 290 [2023-08-27 09:08:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 132 flow. Second operand has 3 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 09:08:36,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:36,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 290 [2023-08-27 09:08:36,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:36,369 INFO L124 PetriNetUnfolderBase]: 901/1570 cut-off events. [2023-08-27 09:08:36,369 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2023-08-27 09:08:36,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4283 conditions, 1570 events. 901/1570 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7655 event pairs, 201 based on Foata normal form. 124/1590 useless extension candidates. Maximal degree in co-relation 4271. Up to 1104 conditions per place. [2023-08-27 09:08:36,375 INFO L140 encePairwiseOnDemand]: 286/290 looper letters, 41 selfloop transitions, 6 changer transitions 1/51 dead transitions. [2023-08-27 09:08:36,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 290 flow [2023-08-27 09:08:36,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-27 09:08:36,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49885057471264366 [2023-08-27 09:08:36,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-27 09:08:36,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-27 09:08:36,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:36,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-27 09:08:36,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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 09:08:36,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:36,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:36,380 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 132 flow. Second operand 3 states and 434 transitions. [2023-08-27 09:08:36,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 290 flow [2023-08-27 09:08:36,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:36,383 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 141 flow [2023-08-27 09:08:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-08-27 09:08:36,383 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2023-08-27 09:08:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 141 flow [2023-08-27 09:08:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:08:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 09:08:36,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:36,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash -459584993, now seen corresponding path program 1 times [2023-08-27 09:08:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144990733] [2023-08-27 09:08:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:36,549 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 09:08:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144990733] [2023-08-27 09:08:36,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144990733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:36,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:36,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:08:36,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79699039] [2023-08-27 09:08:36,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:36,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:36,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:36,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 290 [2023-08-27 09:08:36,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 09:08:36,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:36,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 290 [2023-08-27 09:08:36,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:36,701 INFO L124 PetriNetUnfolderBase]: 869/1614 cut-off events. [2023-08-27 09:08:36,701 INFO L125 PetriNetUnfolderBase]: For 1384/1390 co-relation queries the response was YES. [2023-08-27 09:08:36,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4488 conditions, 1614 events. 869/1614 cut-off events. For 1384/1390 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8063 event pairs, 347 based on Foata normal form. 2/1521 useless extension candidates. Maximal degree in co-relation 4476. Up to 943 conditions per place. [2023-08-27 09:08:36,708 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 48 selfloop transitions, 2 changer transitions 3/58 dead transitions. [2023-08-27 09:08:36,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 58 transitions, 327 flow [2023-08-27 09:08:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-27 09:08:36,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2023-08-27 09:08:36,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-27 09:08:36,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-27 09:08:36,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:36,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-27 09:08:36,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 09:08:36,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:36,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:36,713 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 141 flow. Second operand 3 states and 440 transitions. [2023-08-27 09:08:36,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 58 transitions, 327 flow [2023-08-27 09:08:36,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:36,716 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 147 flow [2023-08-27 09:08:36,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-27 09:08:36,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-08-27 09:08:36,717 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 147 flow [2023-08-27 09:08:36,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 09:08:36,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:36,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:36,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 09:08:36,717 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:36,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:36,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1157068722, now seen corresponding path program 1 times [2023-08-27 09:08:36,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800737794] [2023-08-27 09:08:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:36,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:36,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008694908] [2023-08-27 09:08:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:36,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:36,733 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 09:08:36,757 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 09:08:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:37,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 09:08:37,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:37,210 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 09:08:37,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:37,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800737794] [2023-08-27 09:08:37,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:37,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008694908] [2023-08-27 09:08:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008694908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:37,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:37,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413107745] [2023-08-27 09:08:37,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:37,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:08:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:08:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:08:37,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2023-08-27 09:08:37,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 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 09:08:37,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:37,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2023-08-27 09:08:37,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:37,429 INFO L124 PetriNetUnfolderBase]: 1075/1996 cut-off events. [2023-08-27 09:08:37,429 INFO L125 PetriNetUnfolderBase]: For 1686/1692 co-relation queries the response was YES. [2023-08-27 09:08:37,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 1996 events. 1075/1996 cut-off events. For 1686/1692 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 10042 event pairs, 325 based on Foata normal form. 16/1930 useless extension candidates. Maximal degree in co-relation 5497. Up to 833 conditions per place. [2023-08-27 09:08:37,438 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 68 selfloop transitions, 4 changer transitions 4/81 dead transitions. [2023-08-27 09:08:37,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 81 transitions, 461 flow [2023-08-27 09:08:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:08:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:08:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-27 09:08:37,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2023-08-27 09:08:37,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-27 09:08:37,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-27 09:08:37,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:37,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-27 09:08:37,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 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 09:08:37,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 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 09:08:37,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 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 09:08:37,443 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 147 flow. Second operand 4 states and 576 transitions. [2023-08-27 09:08:37,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 81 transitions, 461 flow [2023-08-27 09:08:37,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 81 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:08:37,446 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 170 flow [2023-08-27 09:08:37,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-27 09:08:37,447 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-08-27 09:08:37,447 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 170 flow [2023-08-27 09:08:37,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 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 09:08:37,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:37,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:37,454 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 09:08:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:37,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:37,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1509399063, now seen corresponding path program 1 times [2023-08-27 09:08:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:37,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515717327] [2023-08-27 09:08:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:37,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:37,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617770468] [2023-08-27 09:08:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:37,671 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 09:08:37,698 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 09:08:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:37,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 09:08:37,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:37,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:08:37,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-27 09:08:38,005 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-27 09:08:38,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 09:08:38,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-27 09:08:38,115 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-27 09:08:38,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-08-27 09:08:38,406 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 09:08:38,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:38,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515717327] [2023-08-27 09:08:38,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617770468] [2023-08-27 09:08:38,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617770468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:38,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:38,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-27 09:08:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283805583] [2023-08-27 09:08:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:38,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 09:08:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 09:08:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-27 09:08:38,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 290 [2023-08-27 09:08:38,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 170 flow. Second operand has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 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 09:08:38,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:38,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 290 [2023-08-27 09:08:38,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:38,996 INFO L124 PetriNetUnfolderBase]: 1599/2924 cut-off events. [2023-08-27 09:08:38,997 INFO L125 PetriNetUnfolderBase]: For 2761/2785 co-relation queries the response was YES. [2023-08-27 09:08:39,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8284 conditions, 2924 events. 1599/2924 cut-off events. For 2761/2785 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 16006 event pairs, 422 based on Foata normal form. 34/2844 useless extension candidates. Maximal degree in co-relation 8267. Up to 1354 conditions per place. [2023-08-27 09:08:39,012 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 112 selfloop transitions, 24 changer transitions 3/144 dead transitions. [2023-08-27 09:08:39,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 144 transitions, 831 flow [2023-08-27 09:08:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 09:08:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 09:08:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1154 transitions. [2023-08-27 09:08:39,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979310344827586 [2023-08-27 09:08:39,016 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1154 transitions. [2023-08-27 09:08:39,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1154 transitions. [2023-08-27 09:08:39,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:39,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1154 transitions. [2023-08-27 09:08:39,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.4) internal successors, (1154), 10 states have internal predecessors, (1154), 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 09:08:39,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 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 09:08:39,023 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 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 09:08:39,023 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 170 flow. Second operand 10 states and 1154 transitions. [2023-08-27 09:08:39,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 144 transitions, 831 flow [2023-08-27 09:08:39,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 144 transitions, 818 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:39,028 INFO L231 Difference]: Finished difference. Result has 63 places, 64 transitions, 365 flow [2023-08-27 09:08:39,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=365, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2023-08-27 09:08:39,029 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2023-08-27 09:08:39,029 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 365 flow [2023-08-27 09:08:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 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 09:08:39,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:39,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:39,042 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 09:08:39,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:39,242 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:39,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1581548763, now seen corresponding path program 2 times [2023-08-27 09:08:39,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:39,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043866865] [2023-08-27 09:08:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:39,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:39,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132172212] [2023-08-27 09:08:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:08:39,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:39,259 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 09:08:39,265 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 09:08:39,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 09:08:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:08:39,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 09:08:39,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:08:39,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-27 09:08:39,564 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-27 09:08:39,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 09:08:39,585 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-27 09:08:39,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-27 09:08:39,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-08-27 09:08:39,903 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 09:08:39,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:39,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043866865] [2023-08-27 09:08:39,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:39,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132172212] [2023-08-27 09:08:39,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132172212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:39,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:39,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-27 09:08:39,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220794064] [2023-08-27 09:08:39,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 09:08:39,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:39,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 09:08:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-27 09:08:39,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 290 [2023-08-27 09:08:39,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 365 flow. Second operand has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 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 09:08:39,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:39,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 290 [2023-08-27 09:08:39,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:40,743 INFO L124 PetriNetUnfolderBase]: 2285/4178 cut-off events. [2023-08-27 09:08:40,743 INFO L125 PetriNetUnfolderBase]: For 5611/5673 co-relation queries the response was YES. [2023-08-27 09:08:40,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12991 conditions, 4178 events. 2285/4178 cut-off events. For 5611/5673 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 24236 event pairs, 537 based on Foata normal form. 63/4207 useless extension candidates. Maximal degree in co-relation 12969. Up to 1206 conditions per place. [2023-08-27 09:08:40,767 INFO L140 encePairwiseOnDemand]: 279/290 looper letters, 134 selfloop transitions, 44 changer transitions 5/188 dead transitions. [2023-08-27 09:08:40,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 188 transitions, 1289 flow [2023-08-27 09:08:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 09:08:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 09:08:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1387 transitions. [2023-08-27 09:08:40,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985632183908046 [2023-08-27 09:08:40,771 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1387 transitions. [2023-08-27 09:08:40,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1387 transitions. [2023-08-27 09:08:40,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:40,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1387 transitions. [2023-08-27 09:08:40,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.58333333333333) internal successors, (1387), 12 states have internal predecessors, (1387), 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 09:08:40,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 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 09:08:40,780 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 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 09:08:40,780 INFO L175 Difference]: Start difference. First operand has 63 places, 64 transitions, 365 flow. Second operand 12 states and 1387 transitions. [2023-08-27 09:08:40,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 188 transitions, 1289 flow [2023-08-27 09:08:40,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 188 transitions, 1287 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-27 09:08:40,794 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 681 flow [2023-08-27 09:08:40,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=681, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2023-08-27 09:08:40,795 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 40 predicate places. [2023-08-27 09:08:40,795 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 681 flow [2023-08-27 09:08:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.77777777777777) internal successors, (934), 9 states have internal predecessors, (934), 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 09:08:40,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:40,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:40,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:41,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 09:08:41,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:41,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1814114205, now seen corresponding path program 1 times [2023-08-27 09:08:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844880767] [2023-08-27 09:08:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:41,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:41,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358121636] [2023-08-27 09:08:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:41,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:41,023 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 09:08:41,026 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 09:08:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:41,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-27 09:08:41,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:41,162 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 09:08:41,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:08:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:41,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844880767] [2023-08-27 09:08:41,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-27 09:08:41,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358121636] [2023-08-27 09:08:41,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358121636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:08:41,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:08:41,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:08:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633900251] [2023-08-27 09:08:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:08:41,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:08:41,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:08:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:08:41,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 290 [2023-08-27 09:08:41,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 681 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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 09:08:41,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:41,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 290 [2023-08-27 09:08:41,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:41,557 INFO L124 PetriNetUnfolderBase]: 1987/3690 cut-off events. [2023-08-27 09:08:41,557 INFO L125 PetriNetUnfolderBase]: For 9076/9076 co-relation queries the response was YES. [2023-08-27 09:08:41,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12165 conditions, 3690 events. 1987/3690 cut-off events. For 9076/9076 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 19899 event pairs, 601 based on Foata normal form. 154/3820 useless extension candidates. Maximal degree in co-relation 12135. Up to 2396 conditions per place. [2023-08-27 09:08:41,577 INFO L140 encePairwiseOnDemand]: 284/290 looper letters, 93 selfloop transitions, 3 changer transitions 11/110 dead transitions. [2023-08-27 09:08:41,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 1098 flow [2023-08-27 09:08:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:08:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:08:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-27 09:08:41,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-27 09:08:41,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-27 09:08:41,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-27 09:08:41,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:41,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-27 09:08:41,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:41,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:41,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 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 09:08:41,583 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 681 flow. Second operand 3 states and 460 transitions. [2023-08-27 09:08:41,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 1098 flow [2023-08-27 09:08:41,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 110 transitions, 1049 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-27 09:08:41,606 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 616 flow [2023-08-27 09:08:41,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=616, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-27 09:08:41,607 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2023-08-27 09:08:41,607 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 616 flow [2023-08-27 09:08:41,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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 09:08:41,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:41,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:41,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:41,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:41,813 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-08-27 09:08:41,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2071604819, now seen corresponding path program 1 times [2023-08-27 09:08:41,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:41,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965850001] [2023-08-27 09:08:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:41,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:41,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-27 09:08:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856749815] [2023-08-27 09:08:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:41,831 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 09:08:41,857 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 09:08:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:08:42,041 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:08:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:08:42,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:08:42,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:08:42,145 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONASSERT (13 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONASSERT (8 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 14 remaining) [2023-08-27 09:08:42,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONASSERT (5 of 14 remaining) [2023-08-27 09:08:42,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 14 remaining) [2023-08-27 09:08:42,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 14 remaining) [2023-08-27 09:08:42,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONASSERT (2 of 14 remaining) [2023-08-27 09:08:42,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 14 remaining) [2023-08-27 09:08:42,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 14 remaining) [2023-08-27 09:08:42,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:42,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:42,355 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:42,359 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 09:08:42,359 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 09:08:42,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:08:42 BasicIcfg [2023-08-27 09:08:42,398 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 09:08:42,398 INFO L158 Benchmark]: Toolchain (without parser) took 16000.61ms. Allocated memory was 348.1MB in the beginning and 503.3MB in the end (delta: 155.2MB). Free memory was 323.3MB in the beginning and 282.3MB in the end (delta: 41.0MB). Peak memory consumption was 199.3MB. Max. memory is 16.0GB. [2023-08-27 09:08:42,398 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 325.6MB in the beginning and 325.5MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 09:08:42,399 INFO L158 Benchmark]: CACSL2BoogieTranslator took 414.55ms. Allocated memory is still 348.1MB. Free memory was 322.5MB in the beginning and 302.9MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 09:08:42,399 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.92ms. Allocated memory is still 348.1MB. Free memory was 302.9MB in the beginning and 300.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:08:42,399 INFO L158 Benchmark]: Boogie Preprocessor took 42.88ms. Allocated memory is still 348.1MB. Free memory was 300.3MB in the beginning and 298.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:08:42,399 INFO L158 Benchmark]: RCFGBuilder took 424.12ms. Allocated memory is still 348.1MB. Free memory was 298.7MB in the beginning and 279.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 09:08:42,400 INFO L158 Benchmark]: TraceAbstraction took 15044.47ms. Allocated memory was 348.1MB in the beginning and 503.3MB in the end (delta: 155.2MB). Free memory was 279.3MB in the beginning and 282.3MB in the end (delta: -3.0MB). Peak memory consumption was 155.3MB. Max. memory is 16.0GB. [2023-08-27 09:08:42,401 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 325.6MB in the beginning and 325.5MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 414.55ms. Allocated memory is still 348.1MB. Free memory was 322.5MB in the beginning and 302.9MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 68.92ms. Allocated memory is still 348.1MB. Free memory was 302.9MB in the beginning and 300.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.88ms. Allocated memory is still 348.1MB. Free memory was 300.3MB in the beginning and 298.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 424.12ms. Allocated memory is still 348.1MB. Free memory was 298.7MB in the beginning and 279.8MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 15044.47ms. Allocated memory was 348.1MB in the beginning and 503.3MB in the end (delta: 155.2MB). Free memory was 279.3MB in the beginning and 282.3MB in the end (delta: -3.0MB). Peak memory consumption was 155.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 208]: Unsoundness Warning unspecified type, defaulting to int C: short [208] - GenericResultAtLocation [Line: 209]: Unsoundness Warning unspecified type, defaulting to int C: short [209] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 140 PlacesBefore, 40 PlacesAfterwards, 145 TransitionsBefore, 40 TransitionsAfterwards, 5392 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 69 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 5 ChoiceCompositions, 134 TotalNumberOfCompositions, 11407 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7198, independent: 6883, independent conditional: 0, independent unconditional: 6883, dependent: 315, dependent conditional: 0, dependent unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3005, independent: 2959, independent conditional: 0, independent unconditional: 2959, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7198, independent: 3924, independent conditional: 0, independent unconditional: 3924, dependent: 269, dependent conditional: 0, dependent unconditional: 269, unknown: 3005, unknown conditional: 0, unknown unconditional: 3005] , Statistics on independence cache: Total cache size (in pairs): 244, Positive cache size: 225, Positive conditional cache size: 0, Positive unconditional cache size: 225, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 681]: assertion can be violated assertion can be violated We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=2, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=3, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] CALL 2 reach_error() [L681] COND FALSE 2 !(0) [L681] 2 __assert_fail ("0", "", 0, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={136:135}, buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 724]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 724]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 681]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 740]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 227 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.8s, OverallIterations: 15, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 600 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 600 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1554 IncrementalHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 2 mSDtfsCounter, 1554 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=681occurred in iteration=13, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 182 ConstructedInterpolants, 18 QuantifiedInterpolants, 1168 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1296 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 19/23 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-27 09:08:42,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...