/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_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-29 19:59:15,760 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 19:59:15,827 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 19:59:15,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 19:59:15,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 19:59:15,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 19:59:15,854 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 19:59:15,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 19:59:15,854 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 19:59:15,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 19:59:15,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 19:59:15,857 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 19:59:15,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 19:59:15,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 19:59:15,860 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 19:59:15,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 19:59:15,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 19:59:15,860 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-29 19:59:15,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 19:59:15,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:59:15,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 19:59:15,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 19:59:15,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 19:59:15,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 19:59:15,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 19:59:15,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 19:59:15,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 19:59:15,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-11-29 19:59:16,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 19:59:16,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 19:59:16,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 19:59:16,070 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 19:59:16,072 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 19:59:16,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-11-29 19:59:17,132 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 19:59:17,321 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 19:59:17,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-11-29 19:59:17,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c5a3355/fbcf90648c0a44dfba37c939a0b42f03/FLAG72f99e307 [2023-11-29 19:59:17,344 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59c5a3355/fbcf90648c0a44dfba37c939a0b42f03 [2023-11-29 19:59:17,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 19:59:17,347 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-29 19:59:17,348 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 19:59:17,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 19:59:17,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 19:59:17,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac8c205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17, skipping insertion in model container [2023-11-29 19:59:17,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,382 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 19:59:17,587 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_42-trylock2_racefree.i[30176,30189] [2023-11-29 19:59:17,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:59:17,632 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 19:59:17,679 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_42-trylock2_racefree.i[30176,30189] [2023-11-29 19:59:17,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:59:17,733 INFO L206 MainTranslator]: Completed translation [2023-11-29 19:59:17,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17 WrapperNode [2023-11-29 19:59:17,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 19:59:17,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 19:59:17,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 19:59:17,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 19:59:17,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,790 INFO L138 Inliner]: procedures = 172, calls = 60, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2023-11-29 19:59:17,790 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 19:59:17,791 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 19:59:17,791 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 19:59:17,791 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 19:59:17,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,814 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,818 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,821 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,837 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 19:59:17,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 19:59:17,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 19:59:17,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 19:59:17,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (1/1) ... [2023-11-29 19:59:17,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:59:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:59:17,878 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 19:59:17,884 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 19:59:17,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-29 19:59:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-29 19:59:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 19:59:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 19:59:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 19:59:17,902 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 19:59:17,903 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 19:59:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 19:59:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-29 19:59:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-29 19:59:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 19:59:17,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 19:59:17,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 19:59:17,905 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 19:59:18,045 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 19:59:18,046 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 19:59:18,261 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 19:59:18,301 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 19:59:18,301 INFO L309 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-29 19:59:18,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:59:18 BoogieIcfgContainer [2023-11-29 19:59:18,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 19:59:18,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 19:59:18,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 19:59:18,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 19:59:18,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:59:17" (1/3) ... [2023-11-29 19:59:18,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2f93bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:59:18, skipping insertion in model container [2023-11-29 19:59:18,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:59:17" (2/3) ... [2023-11-29 19:59:18,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2f93bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:59:18, skipping insertion in model container [2023-11-29 19:59:18,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:59:18" (3/3) ... [2023-11-29 19:59:18,308 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-11-29 19:59:18,320 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 19:59:18,320 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-29 19:59:18,320 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 19:59:18,370 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 19:59:18,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 421 flow [2023-11-29 19:59:18,460 INFO L124 PetriNetUnfolderBase]: 45/310 cut-off events. [2023-11-29 19:59:18,461 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 19:59:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 310 events. 45/310 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1281 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 167. Up to 6 conditions per place. [2023-11-29 19:59:18,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 207 transitions, 421 flow [2023-11-29 19:59:18,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 202 transitions, 408 flow [2023-11-29 19:59:18,478 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:59:18,482 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;@33e6350f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:59:18,482 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 19:59:18,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:59:18,496 INFO L124 PetriNetUnfolderBase]: 6/97 cut-off events. [2023-11-29 19:59:18,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:59:18,496 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:18,496 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] [2023-11-29 19:59:18,498 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 19:59:18,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:18,502 INFO L85 PathProgramCache]: Analyzing trace with hash -851049209, now seen corresponding path program 1 times [2023-11-29 19:59:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:18,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346301849] [2023-11-29 19:59:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:18,770 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 19:59:18,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:18,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346301849] [2023-11-29 19:59:18,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346301849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:59:18,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:59:18,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:59:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571094958] [2023-11-29 19:59:18,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:59:18,782 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:59:18,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:59:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:59:18,805 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 207 [2023-11-29 19:59:18,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 202 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:18,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:18,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 207 [2023-11-29 19:59:18,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:59:19,156 INFO L124 PetriNetUnfolderBase]: 265/1517 cut-off events. [2023-11-29 19:59:19,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:59:19,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 1517 events. 265/1517 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 10055 event pairs, 12 based on Foata normal form. 293/1702 useless extension candidates. Maximal degree in co-relation 2003. Up to 502 conditions per place. [2023-11-29 19:59:19,168 INFO L140 encePairwiseOnDemand]: 177/207 looper letters, 45 selfloop transitions, 2 changer transitions 16/185 dead transitions. [2023-11-29 19:59:19,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 185 transitions, 474 flow [2023-11-29 19:59:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:59:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:59:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-11-29 19:59:19,183 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8180354267310789 [2023-11-29 19:59:19,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-11-29 19:59:19,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-11-29 19:59:19,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:59:19,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-11-29 19:59:19,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 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 19:59:19,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 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 19:59:19,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 0 states have call successors, (0), 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 19:59:19,201 INFO L307 CegarLoopForPetriNet]: 177 programPoint places, -2 predicate places. [2023-11-29 19:59:19,201 INFO L500 AbstractCegarLoop]: Abstraction has has 175 places, 185 transitions, 474 flow [2023-11-29 19:59:19,202 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:19,202 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:19,202 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] [2023-11-29 19:59:19,202 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 19:59:19,203 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 19:59:19,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash -184995863, now seen corresponding path program 1 times [2023-11-29 19:59:19,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:19,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087120562] [2023-11-29 19:59:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:19,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:59:19,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:59:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:59:19,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:59:19,300 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:59:19,302 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 19:59:19,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 19:59:19,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-29 19:59:19,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 19:59:19,303 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 19:59:19,303 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 19:59:19,304 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 19:59:19,305 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:59:19,305 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 19:59:19,334 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 19:59:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 268 transitions, 552 flow [2023-11-29 19:59:19,392 INFO L124 PetriNetUnfolderBase]: 76/500 cut-off events. [2023-11-29 19:59:19,392 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 19:59:19,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 500 events. 76/500 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2328 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 312. Up to 9 conditions per place. [2023-11-29 19:59:19,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 268 transitions, 552 flow [2023-11-29 19:59:19,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 268 transitions, 552 flow [2023-11-29 19:59:19,402 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:59:19,403 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;@33e6350f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:59:19,403 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 19:59:19,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:59:19,410 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-11-29 19:59:19,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:59:19,411 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:19,411 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] [2023-11-29 19:59:19,411 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 19:59:19,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1727773177, now seen corresponding path program 1 times [2023-11-29 19:59:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:19,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224113682] [2023-11-29 19:59:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:19,497 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 19:59:19,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:19,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224113682] [2023-11-29 19:59:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224113682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:59:19,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:59:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:59:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756861566] [2023-11-29 19:59:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:59:19,502 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:59:19,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:59:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:59:19,504 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 268 [2023-11-29 19:59:19,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 268 transitions, 552 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 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 19:59:19,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:19,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 268 [2023-11-29 19:59:19,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:59:22,330 INFO L124 PetriNetUnfolderBase]: 7192/24488 cut-off events. [2023-11-29 19:59:22,331 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2023-11-29 19:59:22,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35607 conditions, 24488 events. 7192/24488 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 279344 event pairs, 3312 based on Foata normal form. 6337/29169 useless extension candidates. Maximal degree in co-relation 2588. Up to 11006 conditions per place. [2023-11-29 19:59:22,543 INFO L140 encePairwiseOnDemand]: 226/268 looper letters, 60 selfloop transitions, 2 changer transitions 22/241 dead transitions. [2023-11-29 19:59:22,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 241 transitions, 632 flow [2023-11-29 19:59:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:59:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:59:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-11-29 19:59:22,546 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7985074626865671 [2023-11-29 19:59:22,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-11-29 19:59:22,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-11-29 19:59:22,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:59:22,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-11-29 19:59:22,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 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 19:59:22,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 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 19:59:22,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 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 19:59:22,556 INFO L307 CegarLoopForPetriNet]: 231 programPoint places, -2 predicate places. [2023-11-29 19:59:22,556 INFO L500 AbstractCegarLoop]: Abstraction has has 229 places, 241 transitions, 632 flow [2023-11-29 19:59:22,556 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 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 19:59:22,557 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:22,557 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] [2023-11-29 19:59:22,557 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 19:59:22,557 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 19:59:22,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash -649602278, now seen corresponding path program 1 times [2023-11-29 19:59:22,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:22,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217874368] [2023-11-29 19:59:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:22,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:22,670 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 19:59:22,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217874368] [2023-11-29 19:59:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217874368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:59:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175099669] [2023-11-29 19:59:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:22,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:59:22,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:59:22,674 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 19:59:22,700 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 19:59:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:22,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:59:22,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:59:22,874 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 19:59:22,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:59:22,920 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 19:59:22,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175099669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:59:22,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:59:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:59:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273021063] [2023-11-29 19:59:22,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:59:22,922 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:59:22,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:59:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:59:22,924 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 268 [2023-11-29 19:59:22,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 241 transitions, 632 flow. Second operand has 10 states, 10 states have (on average 175.6) internal successors, (1756), 10 states have internal predecessors, (1756), 0 states have call successors, (0), 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 19:59:22,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:22,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 268 [2023-11-29 19:59:22,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:59:23,570 INFO L124 PetriNetUnfolderBase]: 1776/4989 cut-off events. [2023-11-29 19:59:23,570 INFO L125 PetriNetUnfolderBase]: For 1012/1370 co-relation queries the response was YES. [2023-11-29 19:59:23,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10597 conditions, 4989 events. 1776/4989 cut-off events. For 1012/1370 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 41477 event pairs, 234 based on Foata normal form. 12/4999 useless extension candidates. Maximal degree in co-relation 787. Up to 2650 conditions per place. [2023-11-29 19:59:23,592 INFO L140 encePairwiseOnDemand]: 263/268 looper letters, 141 selfloop transitions, 7 changer transitions 0/254 dead transitions. [2023-11-29 19:59:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 254 transitions, 1106 flow [2023-11-29 19:59:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:59:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:59:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1707 transitions. [2023-11-29 19:59:23,595 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7077114427860697 [2023-11-29 19:59:23,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1707 transitions. [2023-11-29 19:59:23,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1707 transitions. [2023-11-29 19:59:23,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:59:23,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1707 transitions. [2023-11-29 19:59:23,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.66666666666666) internal successors, (1707), 9 states have internal predecessors, (1707), 0 states have call successors, (0), 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 19:59:23,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 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 19:59:23,602 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 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 19:59:23,603 INFO L307 CegarLoopForPetriNet]: 231 programPoint places, -77 predicate places. [2023-11-29 19:59:23,603 INFO L500 AbstractCegarLoop]: Abstraction has has 154 places, 254 transitions, 1106 flow [2023-11-29 19:59:23,604 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 175.6) internal successors, (1756), 10 states have internal predecessors, (1756), 0 states have call successors, (0), 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 19:59:23,604 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:23,604 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] [2023-11-29 19:59:23,615 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 19:59:23,809 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 19:59:23,809 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 19:59:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash -951874317, now seen corresponding path program 1 times [2023-11-29 19:59:23,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:23,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520523504] [2023-11-29 19:59:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:23,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:59:23,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:59:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:59:23,854 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:59:23,855 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:59:23,855 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 19:59:23,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 19:59:23,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-29 19:59:23,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 19:59:23,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 19:59:23,859 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 19:59:23,859 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 19:59:23,859 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:59:23,859 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 19:59:23,907 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 19:59:23,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 329 transitions, 685 flow [2023-11-29 19:59:23,966 INFO L124 PetriNetUnfolderBase]: 112/725 cut-off events. [2023-11-29 19:59:23,966 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 19:59:23,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 725 events. 112/725 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3519 event pairs, 1 based on Foata normal form. 0/593 useless extension candidates. Maximal degree in co-relation 508. Up to 16 conditions per place. [2023-11-29 19:59:23,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 329 transitions, 685 flow [2023-11-29 19:59:23,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 329 transitions, 685 flow [2023-11-29 19:59:23,981 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:59:23,982 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;@33e6350f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:59:23,982 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 19:59:23,985 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:59:23,986 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-11-29 19:59:23,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:59:23,986 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:23,986 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] [2023-11-29 19:59:23,986 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 19:59:23,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash -336046393, now seen corresponding path program 1 times [2023-11-29 19:59:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184665271] [2023-11-29 19:59:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:24,023 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 19:59:24,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:24,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184665271] [2023-11-29 19:59:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184665271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:59:24,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:59:24,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:59:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061318473] [2023-11-29 19:59:24,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:59:24,024 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:59:24,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:24,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:59:24,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:59:24,029 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 329 [2023-11-29 19:59:24,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 329 transitions, 685 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 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 19:59:24,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:24,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 329 [2023-11-29 19:59:24,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 20:00:04,215 INFO L124 PetriNetUnfolderBase]: 140974/348073 cut-off events. [2023-11-29 20:00:04,215 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2023-11-29 20:00:06,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543078 conditions, 348073 events. 140974/348073 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 5097. Compared 4970489 event pairs, 91645 based on Foata normal form. 115370/455904 useless extension candidates. Maximal degree in co-relation 35434. Up to 193655 conditions per place. [2023-11-29 20:00:07,282 INFO L140 encePairwiseOnDemand]: 275/329 looper letters, 73 selfloop transitions, 2 changer transitions 23/290 dead transitions. [2023-11-29 20:00:07,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 290 transitions, 769 flow [2023-11-29 20:00:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 20:00:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 20:00:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-11-29 20:00:07,284 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7831813576494427 [2023-11-29 20:00:07,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-11-29 20:00:07,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-11-29 20:00:07,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 20:00:07,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-11-29 20:00:07,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 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 20:00:07,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 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 20:00:07,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 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 20:00:07,288 INFO L307 CegarLoopForPetriNet]: 281 programPoint places, -2 predicate places. [2023-11-29 20:00:07,288 INFO L500 AbstractCegarLoop]: Abstraction has has 279 places, 290 transitions, 769 flow [2023-11-29 20:00:07,289 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 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 20:00:07,289 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 20:00:07,289 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] [2023-11-29 20:00:07,289 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 20:00:07,289 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 20:00:07,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 20:00:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -674290763, now seen corresponding path program 1 times [2023-11-29 20:00:07,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 20:00:07,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011051691] [2023-11-29 20:00:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:07,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 20:00:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 20:00:07,339 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 20:00:07,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 20:00:07,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011051691] [2023-11-29 20:00:07,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011051691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 20:00:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78207323] [2023-11-29 20:00:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:07,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 20:00:07,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 20:00:07,352 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 20:00:07,354 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 20:00:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 20:00:07,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 20:00:07,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 20:00:07,451 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 20:00:07,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 20:00:07,477 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 20:00:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78207323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 20:00:07,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 20:00:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 20:00:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283090069] [2023-11-29 20:00:07,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 20:00:07,478 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 20:00:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 20:00:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 20:00:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 20:00:07,479 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 329 [2023-11-29 20:00:07,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 290 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 210.6) internal successors, (2106), 10 states have internal predecessors, (2106), 0 states have call successors, (0), 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 20:00:07,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 20:00:07,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 329 [2023-11-29 20:00:07,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 20:00:47,039 INFO L124 PetriNetUnfolderBase]: 143862/359859 cut-off events. [2023-11-29 20:00:47,039 INFO L125 PetriNetUnfolderBase]: For 59879/83927 co-relation queries the response was YES. [2023-11-29 20:00:48,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747563 conditions, 359859 events. 143862/359859 cut-off events. For 59879/83927 co-relation queries the response was YES. Maximal size of possible extension queue 4827. Compared 5089137 event pairs, 6260 based on Foata normal form. 3/339595 useless extension candidates. Maximal degree in co-relation 45882. Up to 191967 conditions per place. [2023-11-29 20:00:50,465 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 206 selfloop transitions, 9 changer transitions 23/429 dead transitions. [2023-11-29 20:00:50,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 429 transitions, 1763 flow [2023-11-29 20:00:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 20:00:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 20:00:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2095 transitions. [2023-11-29 20:00:50,475 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.707531239446133 [2023-11-29 20:00:50,475 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2095 transitions. [2023-11-29 20:00:50,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2095 transitions. [2023-11-29 20:00:50,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 20:00:50,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2095 transitions. [2023-11-29 20:00:50,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 232.77777777777777) internal successors, (2095), 9 states have internal predecessors, (2095), 0 states have call successors, (0), 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 20:00:50,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 329.0) internal successors, (3290), 10 states have internal predecessors, (3290), 0 states have call successors, (0), 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 20:00:50,507 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 329.0) internal successors, (3290), 10 states have internal predecessors, (3290), 0 states have call successors, (0), 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 20:00:50,509 INFO L307 CegarLoopForPetriNet]: 281 programPoint places, 6 predicate places. [2023-11-29 20:00:50,509 INFO L500 AbstractCegarLoop]: Abstraction has has 287 places, 429 transitions, 1763 flow [2023-11-29 20:00:50,509 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 210.6) internal successors, (2106), 10 states have internal predecessors, (2106), 0 states have call successors, (0), 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 20:00:50,509 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 20:00:50,510 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] [2023-11-29 20:00:50,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 20:00:50,710 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 20:00:50,710 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 20:00:50,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 20:00:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash -63239756, now seen corresponding path program 1 times [2023-11-29 20:00:50,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 20:00:50,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464293150] [2023-11-29 20:00:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:50,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 20:00:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 20:00:50,722 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 20:00:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 20:00:50,767 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 20:00:50,768 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 20:00:50,768 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-29 20:00:50,768 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-29 20:00:50,768 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-29 20:00:50,768 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-29 20:00:50,768 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-29 20:00:50,768 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 20:00:50,768 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 20:00:50,769 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 20:00:50,769 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 20:00:50,799 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 20:00:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 390 transitions, 820 flow [2023-11-29 20:00:50,892 INFO L124 PetriNetUnfolderBase]: 160/1022 cut-off events. [2023-11-29 20:00:50,892 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 20:00:50,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073 conditions, 1022 events. 160/1022 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5205 event pairs, 6 based on Foata normal form. 0/842 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-11-29 20:00:50,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 331 places, 390 transitions, 820 flow [2023-11-29 20:00:50,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 390 transitions, 820 flow [2023-11-29 20:00:50,916 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 20:00:50,917 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;@33e6350f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 20:00:50,917 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 20:00:50,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 20:00:50,920 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-11-29 20:00:50,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 20:00:50,920 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 20:00:50,920 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] [2023-11-29 20:00:50,920 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-29 20:00:50,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 20:00:50,920 INFO L85 PathProgramCache]: Analyzing trace with hash -970836153, now seen corresponding path program 1 times [2023-11-29 20:00:50,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 20:00:50,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819234311] [2023-11-29 20:00:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 20:00:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 20:00:50,941 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 20:00:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 20:00:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819234311] [2023-11-29 20:00:50,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819234311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 20:00:50,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 20:00:50,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 20:00:50,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949777638] [2023-11-29 20:00:50,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 20:00:50,942 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 20:00:50,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 20:00:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 20:00:50,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 20:00:50,943 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 390 [2023-11-29 20:00:50,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 390 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 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 20:00:50,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 20:00:50,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 390 [2023-11-29 20:00:50,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand