/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:40:46,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:40:46,800 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-SemanticLbe.epf [2023-11-17 11:40:46,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:40:46,833 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:40:46,834 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:40:46,835 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:40:46,835 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:40:46,835 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:40:46,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:40:46,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:40:46,840 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:40:46,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:40:46,842 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:40:46,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:40:46,842 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:40:46,843 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:40:46,843 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:40:46,843 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:40:46,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:40:46,843 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:40:46,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:40:46,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:40:46,845 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:40:46,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:40:46,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:46,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:40:46,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:40:46,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:40:46,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:40:46,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:40:46,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:40:46,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:40:47,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:40:47,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:40:47,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:40:47,103 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:40:47,104 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:40:47,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-17 11:40:48,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:40:48,638 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:40:48,641 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-17 11:40:48,661 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785783694/9a2b68a75d204995a5ade0337e93334f/FLAGd76d6775e [2023-11-17 11:40:48,684 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/785783694/9a2b68a75d204995a5ade0337e93334f [2023-11-17 11:40:48,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:40:48,688 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:40:48,691 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:48,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:40:48,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:40:48,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:48" (1/1) ... [2023-11-17 11:40:48,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26358d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:48, skipping insertion in model container [2023-11-17 11:40:48,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:48" (1/1) ... [2023-11-17 11:40:48,755 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:40:49,198 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_70-funloop_racefree.i[41323,41336] [2023-11-17 11:40:49,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:49,264 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:40:49,309 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_70-funloop_racefree.i[41323,41336] [2023-11-17 11:40:49,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:49,397 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:40:49,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49 WrapperNode [2023-11-17 11:40:49,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:49,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:49,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:40:49,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:40:49,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,472 INFO L138 Inliner]: procedures = 272, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 221 [2023-11-17 11:40:49,473 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:49,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:40:49,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:40:49,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:40:49,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,521 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,523 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,526 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:40:49,527 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:40:49,527 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:40:49,527 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:40:49,528 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (1/1) ... [2023-11-17 11:40:49,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:49,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:49,566 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) [2023-11-17 11:40:49,572 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 [2023-11-17 11:40:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:40:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:40:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:40:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:40:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:40:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:40:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:40:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:40:49,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:40:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:40:49,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:40:49,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:40:49,617 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:40:49,812 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:40:49,815 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:40:50,191 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:40:50,353 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:40:50,354 INFO L307 CfgBuilder]: Removed 25 assume(true) statements. [2023-11-17 11:40:50,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:50 BoogieIcfgContainer [2023-11-17 11:40:50,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:40:50,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:40:50,362 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:40:50,364 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:40:50,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:40:48" (1/3) ... [2023-11-17 11:40:50,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133e865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:50, skipping insertion in model container [2023-11-17 11:40:50,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:49" (2/3) ... [2023-11-17 11:40:50,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133e865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:50, skipping insertion in model container [2023-11-17 11:40:50,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:50" (3/3) ... [2023-11-17 11:40:50,367 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-11-17 11:40:50,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:40:50,383 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 11:40:50,383 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:40:50,443 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:40:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 97 transitions, 201 flow [2023-11-17 11:40:50,544 INFO L124 PetriNetUnfolderBase]: 41/143 cut-off events. [2023-11-17 11:40:50,544 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 143 events. 41/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 541 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 90. Up to 8 conditions per place. [2023-11-17 11:40:50,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 97 transitions, 201 flow [2023-11-17 11:40:50,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 95 transitions, 194 flow [2023-11-17 11:40:50,557 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:50,576 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 95 transitions, 194 flow [2023-11-17 11:40:50,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 95 transitions, 194 flow [2023-11-17 11:40:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 95 transitions, 194 flow [2023-11-17 11:40:50,619 INFO L124 PetriNetUnfolderBase]: 40/141 cut-off events. [2023-11-17 11:40:50,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:50,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 141 events. 40/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 522 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 90. Up to 8 conditions per place. [2023-11-17 11:40:50,625 INFO L119 LiptonReduction]: Number of co-enabled transitions 4128 [2023-11-17 11:40:51,725 INFO L134 LiptonReduction]: Checked pairs total: 8321 [2023-11-17 11:40:51,725 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-11-17 11:40:51,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:51,757 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@62e2f8ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:51,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:40:51,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:51,763 INFO L124 PetriNetUnfolderBase]: 10/31 cut-off events. [2023-11-17 11:40:51,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:51,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:51,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:51,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:40:51,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash 356958652, now seen corresponding path program 1 times [2023-11-17 11:40:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:51,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476800662] [2023-11-17 11:40:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:51,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:51,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476800662] [2023-11-17 11:40:51,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476800662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:51,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:51,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285562393] [2023-11-17 11:40:51,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:52,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:52,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:52,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 158 [2023-11-17 11:40:52,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 68 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:52,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 158 [2023-11-17 11:40:52,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:52,200 INFO L124 PetriNetUnfolderBase]: 361/719 cut-off events. [2023-11-17 11:40:52,200 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:52,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 719 events. 361/719 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3261 event pairs, 288 based on Foata normal form. 74/659 useless extension candidates. Maximal degree in co-relation 1338. Up to 669 conditions per place. [2023-11-17 11:40:52,208 INFO L140 encePairwiseOnDemand]: 132/158 looper letters, 39 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-17 11:40:52,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 178 flow [2023-11-17 11:40:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-17 11:40:52,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3080168776371308 [2023-11-17 11:40:52,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-17 11:40:52,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-17 11:40:52,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:52,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-17 11:40:52,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,233 INFO L175 Difference]: Start difference. First operand has 44 places, 68 transitions, 140 flow. Second operand 3 states and 146 transitions. [2023-11-17 11:40:52,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 178 flow [2023-11-17 11:40:52,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:52,238 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 106 flow [2023-11-17 11:40:52,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-11-17 11:40:52,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-11-17 11:40:52,244 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 106 flow [2023-11-17 11:40:52,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:52,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:52,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:40:52,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:40:52,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1494870159, now seen corresponding path program 1 times [2023-11-17 11:40:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:52,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243443324] [2023-11-17 11:40:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:52,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:40:52,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:52,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243443324] [2023-11-17 11:40:52,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243443324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:40:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580926948] [2023-11-17 11:40:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:52,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:52,377 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) [2023-11-17 11:40:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:40:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:52,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:40:52,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:40:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:40:52,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:40:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:40:52,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580926948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:40:52,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:40:52,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:40:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16199424] [2023-11-17 11:40:52,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:40:52,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:40:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:40:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:40:52,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 158 [2023-11-17 11:40:52,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:52,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 158 [2023-11-17 11:40:52,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:52,716 INFO L124 PetriNetUnfolderBase]: 361/722 cut-off events. [2023-11-17 11:40:52,716 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:52,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 722 events. 361/722 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3259 event pairs, 288 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 1397. Up to 669 conditions per place. [2023-11-17 11:40:52,721 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 39 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-17 11:40:52,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 206 flow [2023-11-17 11:40:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:40:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:40:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2023-11-17 11:40:52,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22046413502109705 [2023-11-17 11:40:52,724 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2023-11-17 11:40:52,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2023-11-17 11:40:52,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:52,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2023-11-17 11:40:52,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,728 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,729 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 106 flow. Second operand 6 states and 209 transitions. [2023-11-17 11:40:52,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 206 flow [2023-11-17 11:40:52,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 202 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:52,731 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 138 flow [2023-11-17 11:40:52,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-17 11:40:52,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2023-11-17 11:40:52,732 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 138 flow [2023-11-17 11:40:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.571428571428573) internal successors, (200), 7 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:52,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:52,733 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-17 11:40:52,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:40:52,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:52,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:40:52,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1943962242, now seen corresponding path program 2 times [2023-11-17 11:40:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:52,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358857321] [2023-11-17 11:40:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:40:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358857321] [2023-11-17 11:40:53,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358857321] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:40:53,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130473399] [2023-11-17 11:40:53,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:40:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:53,101 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) [2023-11-17 11:40:53,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:40:53,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:40:53,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:40:53,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:40:53,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:40:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:40:53,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:40:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:40:53,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130473399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:40:53,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:40:53,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:40:53,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867925153] [2023-11-17 11:40:53,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:40:53,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:40:53,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:40:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:40:53,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 158 [2023-11-17 11:40:53,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:53,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:53,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 158 [2023-11-17 11:40:53,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:53,644 INFO L124 PetriNetUnfolderBase]: 361/728 cut-off events. [2023-11-17 11:40:53,644 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-17 11:40:53,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 728 events. 361/728 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3263 event pairs, 288 based on Foata normal form. 6/601 useless extension candidates. Maximal degree in co-relation 1388. Up to 669 conditions per place. [2023-11-17 11:40:53,649 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 39 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2023-11-17 11:40:53,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 274 flow [2023-11-17 11:40:53,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:40:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:40:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 380 transitions. [2023-11-17 11:40:53,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20042194092827004 [2023-11-17 11:40:53,653 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 380 transitions. [2023-11-17 11:40:53,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 380 transitions. [2023-11-17 11:40:53,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:53,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 380 transitions. [2023-11-17 11:40:53,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 31.666666666666668) internal successors, (380), 12 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:53,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:53,659 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 158.0) internal successors, (2054), 13 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:53,659 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 138 flow. Second operand 12 states and 380 transitions. [2023-11-17 11:40:53,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 274 flow [2023-11-17 11:40:53,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 55 transitions, 260 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:53,662 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 208 flow [2023-11-17 11:40:53,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=208, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-17 11:40:53,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2023-11-17 11:40:53,664 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 208 flow [2023-11-17 11:40:53,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.307692307692307) internal successors, (368), 13 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:53,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:53,664 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-17 11:40:53,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:40:53,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-17 11:40:53,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:40:53,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -93850658, now seen corresponding path program 3 times [2023-11-17 11:40:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292256252] [2023-11-17 11:40:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:53,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:40:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:40:53,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:40:53,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:40:53,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:40:53,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:40:53,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:40:53,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:40:53,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:40:53,947 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-17 11:40:53,949 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:40:53,949 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:40:53,976 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:40:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 142 transitions, 300 flow [2023-11-17 11:40:54,025 INFO L124 PetriNetUnfolderBase]: 69/241 cut-off events. [2023-11-17 11:40:54,025 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:40:54,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 241 events. 69/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1113 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 145. Up to 12 conditions per place. [2023-11-17 11:40:54,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 142 transitions, 300 flow [2023-11-17 11:40:54,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 142 transitions, 300 flow [2023-11-17 11:40:54,030 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:54,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 142 transitions, 300 flow [2023-11-17 11:40:54,031 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 142 transitions, 300 flow [2023-11-17 11:40:54,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 142 transitions, 300 flow [2023-11-17 11:40:54,049 INFO L124 PetriNetUnfolderBase]: 69/241 cut-off events. [2023-11-17 11:40:54,050 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:40:54,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 241 events. 69/241 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1113 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 145. Up to 12 conditions per place. [2023-11-17 11:40:54,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 12384 [2023-11-17 11:40:55,424 INFO L134 LiptonReduction]: Checked pairs total: 33012 [2023-11-17 11:40:55,425 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-11-17 11:40:55,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:55,433 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@62e2f8ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:55,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:40:55,438 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:55,438 INFO L124 PetriNetUnfolderBase]: 14/43 cut-off events. [2023-11-17 11:40:55,438 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:55,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:55,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:55,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:40:55,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:55,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1844205485, now seen corresponding path program 1 times [2023-11-17 11:40:55,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:55,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097386329] [2023-11-17 11:40:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:55,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:55,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:55,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097386329] [2023-11-17 11:40:55,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097386329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:55,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:40:55,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:40:55,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035353605] [2023-11-17 11:40:55,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:40:55,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 235 [2023-11-17 11:40:55,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 100 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:55,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:55,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 235 [2023-11-17 11:40:55,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:57,059 INFO L124 PetriNetUnfolderBase]: 11995/18025 cut-off events. [2023-11-17 11:40:57,059 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-17 11:40:57,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35133 conditions, 18025 events. 11995/18025 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 108000 event pairs, 10215 based on Foata normal form. 1942/16427 useless extension candidates. Maximal degree in co-relation 27095. Up to 17020 conditions per place. [2023-11-17 11:40:57,195 INFO L140 encePairwiseOnDemand]: 200/235 looper letters, 60 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-17 11:40:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 278 flow [2023-11-17 11:40:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-11-17 11:40:57,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3049645390070922 [2023-11-17 11:40:57,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-11-17 11:40:57,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-11-17 11:40:57,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:57,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-11-17 11:40:57,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:57,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:57,200 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:57,200 INFO L175 Difference]: Start difference. First operand has 64 places, 100 transitions, 216 flow. Second operand 3 states and 215 transitions. [2023-11-17 11:40:57,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 278 flow [2023-11-17 11:40:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:40:57,203 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 164 flow [2023-11-17 11:40:57,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2023-11-17 11:40:57,204 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-11-17 11:40:57,204 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 164 flow [2023-11-17 11:40:57,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:57,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:57,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:57,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:40:57,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:40:57,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash 292496339, now seen corresponding path program 1 times [2023-11-17 11:40:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003868723] [2023-11-17 11:40:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:57,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:57,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003868723] [2023-11-17 11:40:57,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003868723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:40:57,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008765624] [2023-11-17 11:40:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:57,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:57,244 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) [2023-11-17 11:40:57,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:40:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:57,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 11:40:57,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:40:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:40:57,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:40:57,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008765624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:40:57,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:40:57,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 11:40:57,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349657472] [2023-11-17 11:40:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:40:57,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:40:57,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:40:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:40:57,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 235 [2023-11-17 11:40:57,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:57,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:57,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 235 [2023-11-17 11:40:57,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:40:58,792 INFO L124 PetriNetUnfolderBase]: 12064/18047 cut-off events. [2023-11-17 11:40:58,792 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-17 11:40:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35145 conditions, 18047 events. 12064/18047 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 107989 event pairs, 6996 based on Foata normal form. 0/14520 useless extension candidates. Maximal degree in co-relation 35132. Up to 16985 conditions per place. [2023-11-17 11:40:58,925 INFO L140 encePairwiseOnDemand]: 232/235 looper letters, 78 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-11-17 11:40:58,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 360 flow [2023-11-17 11:40:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:40:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:40:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-17 11:40:58,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28368794326241137 [2023-11-17 11:40:58,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-17 11:40:58,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-17 11:40:58,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:40:58,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-17 11:40:58,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:58,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:58,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:58,930 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 164 flow. Second operand 3 states and 200 transitions. [2023-11-17 11:40:58,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 360 flow [2023-11-17 11:40:58,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 356 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:40:58,935 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 172 flow [2023-11-17 11:40:58,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-11-17 11:40:58,937 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 5 predicate places. [2023-11-17 11:40:58,938 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 172 flow [2023-11-17 11:40:58,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:58,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:58,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:40:58,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 11:40:59,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:59,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:40:59,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash -963763606, now seen corresponding path program 1 times [2023-11-17 11:40:59,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:59,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448880346] [2023-11-17 11:40:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:59,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:59,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:40:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448880346] [2023-11-17 11:40:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448880346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:40:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348675133] [2023-11-17 11:40:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:59,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:40:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:59,200 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) [2023-11-17 11:40:59,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 11:40:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:40:59,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:40:59,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:40:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:59,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:40:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:40:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348675133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:40:59,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:40:59,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:40:59,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82314932] [2023-11-17 11:40:59,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:40:59,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:40:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:40:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:40:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:40:59,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 235 [2023-11-17 11:40:59,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:40:59,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:40:59,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 235 [2023-11-17 11:40:59,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:00,713 INFO L124 PetriNetUnfolderBase]: 12064/18029 cut-off events. [2023-11-17 11:41:00,713 INFO L125 PetriNetUnfolderBase]: For 668/668 co-relation queries the response was YES. [2023-11-17 11:41:00,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35693 conditions, 18029 events. 12064/18029 cut-off events. For 668/668 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 107539 event pairs, 10215 based on Foata normal form. 3/14766 useless extension candidates. Maximal degree in co-relation 35665. Up to 17003 conditions per place. [2023-11-17 11:41:00,814 INFO L140 encePairwiseOnDemand]: 232/235 looper letters, 61 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-17 11:41:00,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 316 flow [2023-11-17 11:41:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:41:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:41:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2023-11-17 11:41:00,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21843971631205675 [2023-11-17 11:41:00,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 308 transitions. [2023-11-17 11:41:00,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 308 transitions. [2023-11-17 11:41:00,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:00,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 308 transitions. [2023-11-17 11:41:00,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,822 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,822 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 172 flow. Second operand 6 states and 308 transitions. [2023-11-17 11:41:00,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 316 flow [2023-11-17 11:41:00,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 73 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:00,828 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 206 flow [2023-11-17 11:41:00,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2023-11-17 11:41:00,830 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2023-11-17 11:41:00,831 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 206 flow [2023-11-17 11:41:00,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:00,831 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:00,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:01,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:01,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:01,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1558036156, now seen corresponding path program 2 times [2023-11-17 11:41:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532637518] [2023-11-17 11:41:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:01,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532637518] [2023-11-17 11:41:01,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532637518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103195484] [2023-11-17 11:41:01,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:41:01,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:01,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:01,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:01,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 11:41:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:41:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:41:01,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 11:41:01,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:01,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-17 11:41:01,344 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 11:41:01,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 11:41:01,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 11:41:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:41:01,425 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:41:01,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103195484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:01,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:41:01,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-17 11:41:01,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453512183] [2023-11-17 11:41:01,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:01,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:41:01,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:41:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-17 11:41:01,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 235 [2023-11-17 11:41:01,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:01,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:01,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 235 [2023-11-17 11:41:01,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:03,150 INFO L124 PetriNetUnfolderBase]: 15391/23631 cut-off events. [2023-11-17 11:41:03,150 INFO L125 PetriNetUnfolderBase]: For 922/922 co-relation queries the response was YES. [2023-11-17 11:41:03,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46978 conditions, 23631 events. 15391/23631 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 155823 event pairs, 2106 based on Foata normal form. 0/19283 useless extension candidates. Maximal degree in co-relation 46942. Up to 16712 conditions per place. [2023-11-17 11:41:03,537 INFO L140 encePairwiseOnDemand]: 226/235 looper letters, 163 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2023-11-17 11:41:03,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 186 transitions, 821 flow [2023-11-17 11:41:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:41:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:41:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 414 transitions. [2023-11-17 11:41:03,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2936170212765957 [2023-11-17 11:41:03,540 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 414 transitions. [2023-11-17 11:41:03,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 414 transitions. [2023-11-17 11:41:03,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:03,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 414 transitions. [2023-11-17 11:41:03,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:03,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:03,544 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 235.0) internal successors, (1645), 7 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:03,544 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 206 flow. Second operand 6 states and 414 transitions. [2023-11-17 11:41:03,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 186 transitions, 821 flow [2023-11-17 11:41:03,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 186 transitions, 807 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:03,553 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 279 flow [2023-11-17 11:41:03,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2023-11-17 11:41:03,555 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 18 predicate places. [2023-11-17 11:41:03,555 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 279 flow [2023-11-17 11:41:03,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:03,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:03,556 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2023-11-17 11:41:03,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:03,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:03,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:03,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2024069260, now seen corresponding path program 1 times [2023-11-17 11:41:03,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:03,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251828444] [2023-11-17 11:41:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:03,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:41:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:03,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251828444] [2023-11-17 11:41:03,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251828444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:03,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734424429] [2023-11-17 11:41:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:03,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:03,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 11:41:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:03,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:41:03,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:41:03,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:41:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734424429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:04,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:04,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:41:04,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719764781] [2023-11-17 11:41:04,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:04,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:41:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:41:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:41:04,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 235 [2023-11-17 11:41:04,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 279 flow. Second operand has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:04,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:04,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 235 [2023-11-17 11:41:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:05,407 INFO L124 PetriNetUnfolderBase]: 15391/23429 cut-off events. [2023-11-17 11:41:05,407 INFO L125 PetriNetUnfolderBase]: For 4442/4442 co-relation queries the response was YES. [2023-11-17 11:41:05,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51094 conditions, 23429 events. 15391/23429 cut-off events. For 4442/4442 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 152303 event pairs, 11938 based on Foata normal form. 6/20284 useless extension candidates. Maximal degree in co-relation 51037. Up to 22450 conditions per place. [2023-11-17 11:41:05,629 INFO L140 encePairwiseOnDemand]: 232/235 looper letters, 75 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2023-11-17 11:41:05,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 487 flow [2023-11-17 11:41:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:41:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:41:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 557 transitions. [2023-11-17 11:41:05,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1975177304964539 [2023-11-17 11:41:05,634 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 557 transitions. [2023-11-17 11:41:05,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 557 transitions. [2023-11-17 11:41:05,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:05,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 557 transitions. [2023-11-17 11:41:05,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 46.416666666666664) internal successors, (557), 12 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 235.0) internal successors, (3055), 13 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,642 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 235.0) internal successors, (3055), 13 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,642 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 279 flow. Second operand 12 states and 557 transitions. [2023-11-17 11:41:05,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 487 flow [2023-11-17 11:41:05,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 487 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:05,682 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 363 flow [2023-11-17 11:41:05,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=363, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2023-11-17 11:41:05,684 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 35 predicate places. [2023-11-17 11:41:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 363 flow [2023-11-17 11:41:05,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.38461538461539) internal successors, (538), 13 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:05,685 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2023-11-17 11:41:05,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 11:41:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:05,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:41:05,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash 199774796, now seen corresponding path program 2 times [2023-11-17 11:41:05,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:05,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228600627] [2023-11-17 11:41:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:05,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:05,926 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:05,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:05,951 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:05,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:41:05,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:41:05,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:41:05,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:41:05,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:41:05,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:41:05,952 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-11-17 11:41:05,954 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:05,954 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:41:05,998 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:41:06,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 187 transitions, 401 flow [2023-11-17 11:41:06,037 INFO L124 PetriNetUnfolderBase]: 100/350 cut-off events. [2023-11-17 11:41:06,038 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:41:06,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 350 events. 100/350 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1818 event pairs, 1 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 250. Up to 16 conditions per place. [2023-11-17 11:41:06,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 187 transitions, 401 flow [2023-11-17 11:41:06,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 187 transitions, 401 flow [2023-11-17 11:41:06,049 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:06,049 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 187 transitions, 401 flow [2023-11-17 11:41:06,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 187 transitions, 401 flow [2023-11-17 11:41:06,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 187 transitions, 401 flow [2023-11-17 11:41:06,078 INFO L124 PetriNetUnfolderBase]: 100/350 cut-off events. [2023-11-17 11:41:06,078 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:41:06,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 350 events. 100/350 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1818 event pairs, 1 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 250. Up to 16 conditions per place. [2023-11-17 11:41:06,098 INFO L119 LiptonReduction]: Number of co-enabled transitions 24510 [2023-11-17 11:41:08,155 INFO L134 LiptonReduction]: Checked pairs total: 60326 [2023-11-17 11:41:08,155 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-17 11:41:08,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:08,159 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@62e2f8ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:08,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:41:08,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:08,163 INFO L124 PetriNetUnfolderBase]: 13/42 cut-off events. [2023-11-17 11:41:08,163 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:08,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:08,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:08,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:41:08,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 932311318, now seen corresponding path program 1 times [2023-11-17 11:41:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:08,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675026102] [2023-11-17 11:41:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:08,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:08,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:08,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675026102] [2023-11-17 11:41:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675026102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:08,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:08,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:08,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81073844] [2023-11-17 11:41:08,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:08,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 308 [2023-11-17 11:41:08,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 131 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:08,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:08,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 308 [2023-11-17 11:41:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:32,568 INFO L124 PetriNetUnfolderBase]: 287996/385646 cut-off events. [2023-11-17 11:41:32,569 INFO L125 PetriNetUnfolderBase]: For 3957/3957 co-relation queries the response was YES. [2023-11-17 11:41:33,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756277 conditions, 385646 events. 287996/385646 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 8147. Compared 2620940 event pairs, 252691 based on Foata normal form. 42974/353780 useless extension candidates. Maximal degree in co-relation 207285. Up to 368685 conditions per place. [2023-11-17 11:41:34,786 INFO L140 encePairwiseOnDemand]: 262/308 looper letters, 78 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-11-17 11:41:34,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 89 transitions, 365 flow [2023-11-17 11:41:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-17 11:41:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30627705627705626 [2023-11-17 11:41:34,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-17 11:41:34,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-17 11:41:34,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:34,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-17 11:41:34,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:34,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:34,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:34,792 INFO L175 Difference]: Start difference. First operand has 83 places, 131 transitions, 289 flow. Second operand 3 states and 283 transitions. [2023-11-17 11:41:34,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 89 transitions, 365 flow [2023-11-17 11:41:34,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 365 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:34,796 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 215 flow [2023-11-17 11:41:34,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2023-11-17 11:41:34,798 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 3 predicate places. [2023-11-17 11:41:34,798 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 215 flow [2023-11-17 11:41:34,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:34,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:34,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:41:34,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:41:34,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2036191524, now seen corresponding path program 1 times [2023-11-17 11:41:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:34,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956879048] [2023-11-17 11:41:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:34,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:34,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956879048] [2023-11-17 11:41:34,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956879048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:34,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910263798] [2023-11-17 11:41:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:34,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:34,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:34,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:34,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 11:41:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:34,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 11:41:34,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:41:34,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:41:34,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910263798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:34,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:41:34,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 11:41:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522627360] [2023-11-17 11:41:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:41:34,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 308 [2023-11-17 11:41:34,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:34,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:34,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 308 [2023-11-17 11:41:34,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:42:00,462 INFO L124 PetriNetUnfolderBase]: 289641/386768 cut-off events. [2023-11-17 11:42:00,463 INFO L125 PetriNetUnfolderBase]: For 3933/3933 co-relation queries the response was YES. [2023-11-17 11:42:01,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757389 conditions, 386768 events. 289641/386768 cut-off events. For 3933/3933 co-relation queries the response was YES. Maximal size of possible extension queue 8170. Compared 2609622 event pairs, 200368 based on Foata normal form. 0/311974 useless extension candidates. Maximal degree in co-relation 757375. Up to 368650 conditions per place. [2023-11-17 11:42:02,724 INFO L140 encePairwiseOnDemand]: 305/308 looper letters, 96 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-11-17 11:42:02,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 107 transitions, 447 flow [2023-11-17 11:42:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:42:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:42:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-11-17 11:42:02,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27813852813852813 [2023-11-17 11:42:02,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-11-17 11:42:02,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-11-17 11:42:02,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:42:02,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-11-17 11:42:02,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:42:02,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:42:02,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:42:02,728 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 215 flow. Second operand 3 states and 257 transitions. [2023-11-17 11:42:02,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 107 transitions, 447 flow [2023-11-17 11:42:02,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 107 transitions, 443 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:42:02,731 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 223 flow [2023-11-17 11:42:02,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-11-17 11:42:02,732 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2023-11-17 11:42:02,732 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 223 flow [2023-11-17 11:42:02,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:42:02,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:42:02,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:42:02,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 11:42:02,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:42:02,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:42:02,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:42:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash -674962342, now seen corresponding path program 1 times [2023-11-17 11:42:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:42:02,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44571720] [2023-11-17 11:42:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:42:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:42:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:02,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:42:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44571720] [2023-11-17 11:42:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44571720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:42:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325993724] [2023-11-17 11:42:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:42:02,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:42:02,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:42:02,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:42:02,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 11:42:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:42:03,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:42:03,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:42:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:03,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:42:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:42:03,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325993724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:42:03,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:42:03,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:42:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053038898] [2023-11-17 11:42:03,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:42:03,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:42:03,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:42:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:42:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:42:03,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 308 [2023-11-17 11:42:03,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 223 flow. Second operand has 7 states, 7 states have (on average 55.142857142857146) internal successors, (386), 7 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:42:03,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:42:03,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 308 [2023-11-17 11:42:03,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand