/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-29 19:55:37,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 19:55:37,736 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-NoLbe.epf [2023-11-29 19:55:37,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 19:55:37,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 19:55:37,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 19:55:37,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 19:55:37,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 19:55:37,762 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 19:55:37,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 19:55:37,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 19:55:37,765 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 19:55:37,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 19:55:37,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 19:55:37,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 19:55:37,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 19:55:37,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 19:55:37,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 19:55:37,766 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 19:55:37,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 19:55:37,767 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 19:55:37,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 19:55:37,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 19:55:37,768 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-29 19:55:37,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 19:55:37,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:55:37,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 19:55:37,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 19:55:37,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 19:55:37,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 19:55:37,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 19:55:37,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 19:55:37,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 19:55:37,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-11-29 19:55:37,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 19:55:37,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 19:55:37,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 19:55:37,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 19:55:37,971 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 19:55:37,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-11-29 19:55:39,046 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 19:55:39,180 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 19:55:39,180 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-11-29 19:55:39,190 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5539243/17ffb02427a144b49aae19768bb2c5f6/FLAG6102e5fb5 [2023-11-29 19:55:39,202 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5539243/17ffb02427a144b49aae19768bb2c5f6 [2023-11-29 19:55:39,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 19:55:39,205 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-29 19:55:39,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 19:55:39,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 19:55:39,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 19:55:39,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ac4785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39, skipping insertion in model container [2023-11-29 19:55:39,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,241 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 19:55:39,415 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2023-11-29 19:55:39,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:55:39,435 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 19:55:39,455 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i[30176,30189] [2023-11-29 19:55:39,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:55:39,483 INFO L206 MainTranslator]: Completed translation [2023-11-29 19:55:39,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39 WrapperNode [2023-11-29 19:55:39,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 19:55:39,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 19:55:39,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 19:55:39,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 19:55:39,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,509 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2023-11-29 19:55:39,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 19:55:39,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 19:55:39,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 19:55:39,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 19:55:39,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,523 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,525 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 19:55:39,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 19:55:39,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 19:55:39,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 19:55:39,527 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (1/1) ... [2023-11-29 19:55:39,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:55:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:55:39,549 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) [2023-11-29 19:55:39,555 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 [2023-11-29 19:55:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-29 19:55:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-29 19:55:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 19:55:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 19:55:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 19:55:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 19:55:39,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 19:55:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 19:55:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-29 19:55:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 19:55:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 19:55:39,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 19:55:39,576 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 19:55:39,661 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 19:55:39,663 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 19:55:39,795 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 19:55:39,814 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 19:55:39,815 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 19:55:39,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:55:39 BoogieIcfgContainer [2023-11-29 19:55:39,816 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 19:55:39,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 19:55:39,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 19:55:39,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 19:55:39,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:55:39" (1/3) ... [2023-11-29 19:55:39,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecbfcdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:55:39, skipping insertion in model container [2023-11-29 19:55:39,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:39" (2/3) ... [2023-11-29 19:55:39,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecbfcdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:55:39, skipping insertion in model container [2023-11-29 19:55:39,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:55:39" (3/3) ... [2023-11-29 19:55:39,821 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-11-29 19:55:39,832 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 19:55:39,833 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 19:55:39,833 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 19:55:39,863 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 19:55:39,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 127 transitions, 261 flow [2023-11-29 19:55:39,949 INFO L124 PetriNetUnfolderBase]: 17/169 cut-off events. [2023-11-29 19:55:39,949 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 19:55:39,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 169 events. 17/169 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 424 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2023-11-29 19:55:39,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 127 transitions, 261 flow [2023-11-29 19:55:39,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 122 transitions, 248 flow [2023-11-29 19:55:39,968 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:55:39,976 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@168cdbca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:55:39,976 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:55:39,988 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:55:39,992 INFO L124 PetriNetUnfolderBase]: 3/83 cut-off events. [2023-11-29 19:55:39,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:55:39,993 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:39,993 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:39,994 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:39,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash 662631060, now seen corresponding path program 1 times [2023-11-29 19:55:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:40,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512220548] [2023-11-29 19:55:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:40,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:40,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512220548] [2023-11-29 19:55:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512220548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:55:40,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:55:40,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:55:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771677764] [2023-11-29 19:55:40,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:55:40,276 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:55:40,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:55:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:55:40,296 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 127 [2023-11-29 19:55:40,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:40,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:40,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 127 [2023-11-29 19:55:40,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:40,387 INFO L124 PetriNetUnfolderBase]: 66/442 cut-off events. [2023-11-29 19:55:40,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:55:40,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 442 events. 66/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2137 event pairs, 6 based on Foata normal form. 69/478 useless extension candidates. Maximal degree in co-relation 542. Up to 132 conditions per place. [2023-11-29 19:55:40,391 INFO L140 encePairwiseOnDemand]: 113/127 looper letters, 23 selfloop transitions, 2 changer transitions 16/118 dead transitions. [2023-11-29 19:55:40,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 118 transitions, 296 flow [2023-11-29 19:55:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:55:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:55:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-11-29 19:55:40,402 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.863517060367454 [2023-11-29 19:55:40,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-11-29 19:55:40,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-11-29 19:55:40,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:55:40,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-11-29 19:55:40,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:40,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:40,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:40,414 INFO L307 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2023-11-29 19:55:40,414 INFO L500 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 296 flow [2023-11-29 19:55:40,414 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:40,415 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:40,415 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:40,415 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 19:55:40,416 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:40,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -333134150, now seen corresponding path program 1 times [2023-11-29 19:55:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:40,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077175444] [2023-11-29 19:55:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:55:40,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:55:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:55:40,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:55:40,487 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:55:40,488 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:55:40,489 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:55:40,489 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 19:55:40,489 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 19:55:40,491 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:55:40,491 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 19:55:40,510 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 19:55:40,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 346 flow [2023-11-29 19:55:40,553 INFO L124 PetriNetUnfolderBase]: 31/275 cut-off events. [2023-11-29 19:55:40,553 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 19:55:40,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 275 events. 31/275 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 879 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-29 19:55:40,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 346 flow [2023-11-29 19:55:40,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 346 flow [2023-11-29 19:55:40,565 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:55:40,566 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@168cdbca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:55:40,566 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:55:40,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:55:40,573 INFO L124 PetriNetUnfolderBase]: 3/83 cut-off events. [2023-11-29 19:55:40,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:55:40,573 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:40,574 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:40,574 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:40,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash -660339655, now seen corresponding path program 1 times [2023-11-29 19:55:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:40,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080049887] [2023-11-29 19:55:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:40,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:40,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080049887] [2023-11-29 19:55:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080049887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:55:40,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:55:40,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:55:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266431261] [2023-11-29 19:55:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:55:40,656 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:55:40,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:55:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:55:40,657 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 165 [2023-11-29 19:55:40,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:40,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:40,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 165 [2023-11-29 19:55:40,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:41,162 INFO L124 PetriNetUnfolderBase]: 1058/3908 cut-off events. [2023-11-29 19:55:41,163 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-29 19:55:41,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5701 conditions, 3908 events. 1058/3908 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 34891 event pairs, 856 based on Foata normal form. 878/4474 useless extension candidates. Maximal degree in co-relation 725. Up to 1728 conditions per place. [2023-11-29 19:55:41,177 INFO L140 encePairwiseOnDemand]: 145/165 looper letters, 32 selfloop transitions, 2 changer transitions 22/157 dead transitions. [2023-11-29 19:55:41,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 157 transitions, 408 flow [2023-11-29 19:55:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:55:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:55:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-11-29 19:55:41,181 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2023-11-29 19:55:41,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-11-29 19:55:41,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-11-29 19:55:41,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:55:41,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-11-29 19:55:41,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,192 INFO L307 CegarLoopForPetriNet]: 151 programPoint places, 1 predicate places. [2023-11-29 19:55:41,192 INFO L500 AbstractCegarLoop]: Abstraction has has 152 places, 157 transitions, 408 flow [2023-11-29 19:55:41,193 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,193 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:41,193 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:41,193 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 19:55:41,193 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:41,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash 23480088, now seen corresponding path program 1 times [2023-11-29 19:55:41,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:41,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838372753] [2023-11-29 19:55:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:41,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:41,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838372753] [2023-11-29 19:55:41,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838372753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:55:41,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504631070] [2023-11-29 19:55:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:41,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:55:41,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:55:41,309 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) [2023-11-29 19:55:41,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 19:55:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:41,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:55:41,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:55:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:41,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:55:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:41,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504631070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:55:41,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:55:41,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:55:41,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372758762] [2023-11-29 19:55:41,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:55:41,455 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:55:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:55:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:55:41,457 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 165 [2023-11-29 19:55:41,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 157 transitions, 408 flow. Second operand has 10 states, 10 states have (on average 119.6) internal successors, (1196), 10 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:41,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 165 [2023-11-29 19:55:41,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:41,677 INFO L124 PetriNetUnfolderBase]: 492/1342 cut-off events. [2023-11-29 19:55:41,677 INFO L125 PetriNetUnfolderBase]: For 354/620 co-relation queries the response was YES. [2023-11-29 19:55:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2978 conditions, 1342 events. 492/1342 cut-off events. For 354/620 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8809 event pairs, 0 based on Foata normal form. 8/1312 useless extension candidates. Maximal degree in co-relation 392. Up to 754 conditions per place. [2023-11-29 19:55:41,683 INFO L140 encePairwiseOnDemand]: 160/165 looper letters, 75 selfloop transitions, 7 changer transitions 0/170 dead transitions. [2023-11-29 19:55:41,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 170 transitions, 674 flow [2023-11-29 19:55:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:55:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:55:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1137 transitions. [2023-11-29 19:55:41,686 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7656565656565657 [2023-11-29 19:55:41,686 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1137 transitions. [2023-11-29 19:55:41,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1137 transitions. [2023-11-29 19:55:41,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:55:41,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1137 transitions. [2023-11-29 19:55:41,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 126.33333333333333) internal successors, (1137), 9 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,691 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,692 INFO L307 CegarLoopForPetriNet]: 151 programPoint places, -27 predicate places. [2023-11-29 19:55:41,692 INFO L500 AbstractCegarLoop]: Abstraction has has 124 places, 170 transitions, 674 flow [2023-11-29 19:55:41,692 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 119.6) internal successors, (1196), 10 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:41,693 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:41,693 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:41,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 19:55:41,898 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:55:41,898 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:41,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash 542722500, now seen corresponding path program 1 times [2023-11-29 19:55:41,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:41,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424571478] [2023-11-29 19:55:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:41,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:55:41,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:55:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:55:41,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:55:41,925 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:55:41,925 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:55:41,925 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:55:41,925 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 19:55:41,925 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 19:55:41,926 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:55:41,926 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 19:55:41,957 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 19:55:41,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 203 transitions, 433 flow [2023-11-29 19:55:41,994 INFO L124 PetriNetUnfolderBase]: 50/416 cut-off events. [2023-11-29 19:55:41,994 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 19:55:41,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 416 events. 50/416 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1460 event pairs, 1 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 283. Up to 16 conditions per place. [2023-11-29 19:55:41,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 203 transitions, 433 flow [2023-11-29 19:55:42,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 203 transitions, 433 flow [2023-11-29 19:55:42,002 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:55:42,006 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@168cdbca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:55:42,006 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:55:42,012 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:55:42,012 INFO L124 PetriNetUnfolderBase]: 3/83 cut-off events. [2023-11-29 19:55:42,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:55:42,012 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:42,013 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:42,013 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:42,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash 575316996, now seen corresponding path program 1 times [2023-11-29 19:55:42,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:42,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596048992] [2023-11-29 19:55:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596048992] [2023-11-29 19:55:42,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596048992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:55:42,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:55:42,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:55:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626159098] [2023-11-29 19:55:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:55:42,042 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:55:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:55:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:55:42,043 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 203 [2023-11-29 19:55:42,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 203 transitions, 433 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:42,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:42,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 203 [2023-11-29 19:55:42,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:45,516 INFO L124 PetriNetUnfolderBase]: 11851/34572 cut-off events. [2023-11-29 19:55:45,516 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2023-11-29 19:55:45,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51857 conditions, 34572 events. 11851/34572 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 419546 event pairs, 7555 based on Foata normal form. 9294/42864 useless extension candidates. Maximal degree in co-relation 6001. Up to 16847 conditions per place. [2023-11-29 19:55:45,701 INFO L140 encePairwiseOnDemand]: 177/203 looper letters, 39 selfloop transitions, 2 changer transitions 23/189 dead transitions. [2023-11-29 19:55:45,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 189 transitions, 499 flow [2023-11-29 19:55:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:55:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:55:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-11-29 19:55:45,703 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8275862068965517 [2023-11-29 19:55:45,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-11-29 19:55:45,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-11-29 19:55:45,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:55:45,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-11-29 19:55:45,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:45,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:45,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:45,706 INFO L307 CegarLoopForPetriNet]: 184 programPoint places, 1 predicate places. [2023-11-29 19:55:45,706 INFO L500 AbstractCegarLoop]: Abstraction has has 185 places, 189 transitions, 499 flow [2023-11-29 19:55:45,706 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:45,706 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:45,706 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:45,707 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 19:55:45,707 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:45,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1258045345, now seen corresponding path program 1 times [2023-11-29 19:55:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:45,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647878093] [2023-11-29 19:55:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:45,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647878093] [2023-11-29 19:55:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647878093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:55:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609700415] [2023-11-29 19:55:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:55:45,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:55:45,753 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) [2023-11-29 19:55:45,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 19:55:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:45,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:55:45,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:55:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:45,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:55:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:45,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609700415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:55:45,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:55:45,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:55:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485232274] [2023-11-29 19:55:45,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:55:45,903 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:55:45,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:55:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:55:45,905 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 203 [2023-11-29 19:55:45,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 189 transitions, 499 flow. Second operand has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:45,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:45,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 203 [2023-11-29 19:55:45,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:55:48,890 INFO L124 PetriNetUnfolderBase]: 12227/32098 cut-off events. [2023-11-29 19:55:48,890 INFO L125 PetriNetUnfolderBase]: For 6807/12820 co-relation queries the response was YES. [2023-11-29 19:55:48,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66844 conditions, 32098 events. 12227/32098 cut-off events. For 6807/12820 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 359660 event pairs, 1781 based on Foata normal form. 4/30023 useless extension candidates. Maximal degree in co-relation 7422. Up to 16943 conditions per place. [2023-11-29 19:55:49,094 INFO L140 encePairwiseOnDemand]: 197/203 looper letters, 106 selfloop transitions, 9 changer transitions 23/262 dead transitions. [2023-11-29 19:55:49,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 262 transitions, 1029 flow [2023-11-29 19:55:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:55:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:55:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1392 transitions. [2023-11-29 19:55:49,096 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7619047619047619 [2023-11-29 19:55:49,096 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1392 transitions. [2023-11-29 19:55:49,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1392 transitions. [2023-11-29 19:55:49,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:55:49,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1392 transitions. [2023-11-29 19:55:49,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.66666666666666) internal successors, (1392), 9 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:49,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:49,101 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:49,102 INFO L307 CegarLoopForPetriNet]: 184 programPoint places, 9 predicate places. [2023-11-29 19:55:49,102 INFO L500 AbstractCegarLoop]: Abstraction has has 193 places, 262 transitions, 1029 flow [2023-11-29 19:55:49,102 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.6) internal successors, (1436), 10 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:49,103 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:49,103 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:49,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 19:55:49,308 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 19:55:49,308 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:49,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:49,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1573755497, now seen corresponding path program 1 times [2023-11-29 19:55:49,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:49,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772870216] [2023-11-29 19:55:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:49,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:55:49,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:55:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:55:49,358 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:55:49,358 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:55:49,358 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:55:49,358 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:55:49,359 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 19:55:49,359 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 19:55:49,359 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:55:49,359 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 19:55:49,389 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 19:55:49,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 522 flow [2023-11-29 19:55:49,437 INFO L124 PetriNetUnfolderBase]: 81/629 cut-off events. [2023-11-29 19:55:49,437 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 19:55:49,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 629 events. 81/629 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2564 event pairs, 6 based on Foata normal form. 0/543 useless extension candidates. Maximal degree in co-relation 436. Up to 32 conditions per place. [2023-11-29 19:55:49,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 241 transitions, 522 flow [2023-11-29 19:55:49,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 241 transitions, 522 flow [2023-11-29 19:55:49,448 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:55:49,448 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@168cdbca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:55:49,448 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:55:49,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:55:49,452 INFO L124 PetriNetUnfolderBase]: 5/90 cut-off events. [2023-11-29 19:55:49,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:55:49,452 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:55:49,452 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:55:49,453 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:55:49,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:55:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash 74633717, now seen corresponding path program 1 times [2023-11-29 19:55:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:55:49,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220924613] [2023-11-29 19:55:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:55:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:55:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:55:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:55:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:55:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220924613] [2023-11-29 19:55:49,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220924613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:55:49,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:55:49,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:55:49,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60272169] [2023-11-29 19:55:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:55:49,499 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:55:49,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:55:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:55:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:55:49,500 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 241 [2023-11-29 19:55:49,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 241 transitions, 522 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:55:49,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:55:49,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 241 [2023-11-29 19:55:49,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:56:22,162 INFO L124 PetriNetUnfolderBase]: 116073/285467 cut-off events. [2023-11-29 19:56:22,162 INFO L125 PetriNetUnfolderBase]: For 11989/11989 co-relation queries the response was YES. [2023-11-29 19:56:23,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442151 conditions, 285467 events. 116073/285467 cut-off events. For 11989/11989 co-relation queries the response was YES. Maximal size of possible extension queue 5999. Compared 4102489 event pairs, 84882 based on Foata normal form. 87631/366100 useless extension candidates. Maximal degree in co-relation 52716. Up to 152541 conditions per place. [2023-11-29 19:56:24,855 INFO L140 encePairwiseOnDemand]: 209/241 looper letters, 46 selfloop transitions, 2 changer transitions 24/221 dead transitions. [2023-11-29 19:56:24,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 221 transitions, 592 flow [2023-11-29 19:56:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:56:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:56:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-11-29 19:56:24,857 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8160442600276625 [2023-11-29 19:56:24,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-11-29 19:56:24,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-11-29 19:56:24,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:56:24,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-11-29 19:56:24,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:56:24,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:56:24,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:56:24,860 INFO L307 CegarLoopForPetriNet]: 217 programPoint places, 1 predicate places. [2023-11-29 19:56:24,860 INFO L500 AbstractCegarLoop]: Abstraction has has 218 places, 221 transitions, 592 flow [2023-11-29 19:56:24,861 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:56:24,861 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:56:24,861 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:56:24,861 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 19:56:24,861 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:56:24,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:56:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash -693762036, now seen corresponding path program 1 times [2023-11-29 19:56:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:56:24,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964455528] [2023-11-29 19:56:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:56:24,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:56:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:56:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:24,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:56:24,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964455528] [2023-11-29 19:56:24,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964455528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:56:24,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209191401] [2023-11-29 19:56:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:56:24,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:56:24,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:56:24,926 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) [2023-11-29 19:56:24,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 19:56:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:56:25,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:56:25,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:56:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:25,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:56:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:56:25,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209191401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:56:25,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:56:25,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:56:25,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692682619] [2023-11-29 19:56:25,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:56:25,063 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:56:25,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:56:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:56:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:56:25,066 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 241 [2023-11-29 19:56:25,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 221 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 167.6) internal successors, (1676), 10 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:56:25,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:56:25,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 241 [2023-11-29 19:56:25,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:56:57,402 INFO L124 PetriNetUnfolderBase]: 124548/286904 cut-off events. [2023-11-29 19:56:57,402 INFO L125 PetriNetUnfolderBase]: For 52070/79397 co-relation queries the response was YES. [2023-11-29 19:56:59,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614621 conditions, 286904 events. 124548/286904 cut-off events. For 52070/79397 co-relation queries the response was YES. Maximal size of possible extension queue 5863. Compared 3933421 event pairs, 15472 based on Foata normal form. 13/272352 useless extension candidates. Maximal degree in co-relation 71260. Up to 160442 conditions per place. [2023-11-29 19:57:00,281 INFO L140 encePairwiseOnDemand]: 235/241 looper letters, 119 selfloop transitions, 9 changer transitions 24/300 dead transitions. [2023-11-29 19:57:00,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 300 transitions, 1174 flow [2023-11-29 19:57:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:57:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:57:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1622 transitions. [2023-11-29 19:57:00,285 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.747810050714615 [2023-11-29 19:57:00,285 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1622 transitions. [2023-11-29 19:57:00,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1622 transitions. [2023-11-29 19:57:00,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:57:00,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1622 transitions. [2023-11-29 19:57:00,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:00,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:00,291 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:00,291 INFO L307 CegarLoopForPetriNet]: 217 programPoint places, 9 predicate places. [2023-11-29 19:57:00,291 INFO L500 AbstractCegarLoop]: Abstraction has has 226 places, 300 transitions, 1174 flow [2023-11-29 19:57:00,292 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 167.6) internal successors, (1676), 10 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:00,292 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:57:00,292 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:57:00,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 19:57:00,496 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:57:00,497 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:57:00,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:57:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -41362025, now seen corresponding path program 1 times [2023-11-29 19:57:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:57:00,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850017937] [2023-11-29 19:57:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:57:00,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:57:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:57:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:57:00,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:57:00,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850017937] [2023-11-29 19:57:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850017937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:57:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215766907] [2023-11-29 19:57:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:57:00,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:57:00,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:57:00,872 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) [2023-11-29 19:57:00,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 19:57:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:57:00,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 19:57:00,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:57:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:57:01,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:57:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:57:01,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215766907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:57:01,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:57:01,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-29 19:57:01,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950490744] [2023-11-29 19:57:01,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:57:01,124 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 19:57:01,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:57:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 19:57:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-29 19:57:01,128 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 241 [2023-11-29 19:57:01,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 300 transitions, 1174 flow. Second operand has 18 states, 18 states have (on average 167.77777777777777) internal successors, (3020), 18 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:01,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:57:01,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 241 [2023-11-29 19:57:01,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:57:12,181 INFO L124 PetriNetUnfolderBase]: 52824/99538 cut-off events. [2023-11-29 19:57:12,181 INFO L125 PetriNetUnfolderBase]: For 50297/73038 co-relation queries the response was YES. [2023-11-29 19:57:12,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307564 conditions, 99538 events. 52824/99538 cut-off events. For 50297/73038 co-relation queries the response was YES. Maximal size of possible extension queue 2464. Compared 1056704 event pairs, 1610 based on Foata normal form. 1518/100812 useless extension candidates. Maximal degree in co-relation 35695. Up to 66806 conditions per place. [2023-11-29 19:57:13,334 INFO L140 encePairwiseOnDemand]: 236/241 looper letters, 261 selfloop transitions, 13 changer transitions 0/410 dead transitions. [2023-11-29 19:57:13,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 410 transitions, 2484 flow [2023-11-29 19:57:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 19:57:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 19:57:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2709 transitions. [2023-11-29 19:57:13,338 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7493775933609959 [2023-11-29 19:57:13,338 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2709 transitions. [2023-11-29 19:57:13,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2709 transitions. [2023-11-29 19:57:13,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:57:13,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2709 transitions. [2023-11-29 19:57:13,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 180.6) internal successors, (2709), 15 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:13,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:13,347 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 241.0) internal successors, (3856), 16 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:13,348 INFO L307 CegarLoopForPetriNet]: 217 programPoint places, -13 predicate places. [2023-11-29 19:57:13,348 INFO L500 AbstractCegarLoop]: Abstraction has has 204 places, 410 transitions, 2484 flow [2023-11-29 19:57:13,348 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 167.77777777777777) internal successors, (3020), 18 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:57:13,349 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:57:13,349 INFO L232 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:57:13,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 19:57:13,552 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:57:13,553 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:57:13,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:57:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1736643891, now seen corresponding path program 1 times [2023-11-29 19:57:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:57:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53775443] [2023-11-29 19:57:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:57:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:57:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:57:13,565 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:57:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:57:13,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:57:13,588 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:57:13,588 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:57:13,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:57:13,588 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 19:57:13,589 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 19:57:13,590 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:57:13,590 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 19:57:13,618 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-29 19:57:13,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 279 transitions, 613 flow [2023-11-29 19:57:13,706 INFO L124 PetriNetUnfolderBase]: 140/990 cut-off events. [2023-11-29 19:57:13,706 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-29 19:57:13,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 990 events. 140/990 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4719 event pairs, 23 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 674. Up to 80 conditions per place. [2023-11-29 19:57:13,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 279 transitions, 613 flow [2023-11-29 19:57:13,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 279 transitions, 613 flow [2023-11-29 19:57:13,725 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:57:13,725 INFO L362 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@168cdbca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:57:13,725 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:57:13,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:57:13,728 INFO L124 PetriNetUnfolderBase]: 5/90 cut-off events. [2023-11-29 19:57:13,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:57:13,729 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:57:13,729 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:57:13,729 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:57:13,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:57:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2132577804, now seen corresponding path program 1 times [2023-11-29 19:57:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:57:13,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552357521] [2023-11-29 19:57:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:57:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:57:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:57:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:57:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:57:13,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552357521] [2023-11-29 19:57:13,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552357521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:57:13,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:57:13,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:57:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294047041] [2023-11-29 19:57:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:57:13,748 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:57:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:57:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:57:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:57:13,749 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 279 [2023-11-29 19:57:13,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 279 transitions, 613 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 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) [2023-11-29 19:57:13,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:57:13,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 279 [2023-11-29 19:57:13,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand