/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_21-deref_read_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:38:42,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:38:42,664 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 11:38:42,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:38:42,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:38:42,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:38:42,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:38:42,682 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:38:42,682 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:38:42,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:38:42,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:38:42,683 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:38:42,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:38:42,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:38:42,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:38:42,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:38:42,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:38:42,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:38:42,684 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:38:42,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:38:42,685 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:38:42,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:38:42,697 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:38:42,698 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:38:42,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:38:42,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:38:42,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:38:42,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:38:42,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:38:42,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:38:42,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:38:42,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:38:42,699 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:38:42,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:38:42,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:38:42,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:38:42,856 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:38:42,856 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:38:42,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-17 11:38:43,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:38:44,151 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:38:44,152 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-17 11:38:44,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657abdcb1/431f56bfa5bd46dbb1100def65066350/FLAG1862b8c23 [2023-11-17 11:38:44,181 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/657abdcb1/431f56bfa5bd46dbb1100def65066350 [2023-11-17 11:38:44,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:38:44,184 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:38:44,184 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:38:44,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:38:44,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:38:44,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d3269d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44, skipping insertion in model container [2023-11-17 11:38:44,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:38:44,445 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_21-deref_read_racing.i[30176,30189] [2023-11-17 11:38:44,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:38:44,479 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:38:44,514 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_21-deref_read_racing.i[30176,30189] [2023-11-17 11:38:44,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:38:44,554 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:38:44,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44 WrapperNode [2023-11-17 11:38:44,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:38:44,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:38:44,557 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:38:44,557 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:38:44,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,597 INFO L138 Inliner]: procedures = 171, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2023-11-17 11:38:44,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:38:44,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:38:44,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:38:44,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:38:44,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,607 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,611 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:38:44,618 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:38:44,618 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:38:44,618 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:38:44,619 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (1/1) ... [2023-11-17 11:38:44,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:38:44,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:44,668 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 11:38:44,677 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 11:38:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:38:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:38:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:38:44,692 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:38:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:38:44,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:38:44,693 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 11:38:44,778 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:38:44,780 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:38:44,904 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:38:45,018 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:38:45,019 INFO L307 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-17 11:38:45,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:38:45 BoogieIcfgContainer [2023-11-17 11:38:45,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:38:45,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:38:45,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:38:45,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:38:45,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:38:44" (1/3) ... [2023-11-17 11:38:45,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a137308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:38:45, skipping insertion in model container [2023-11-17 11:38:45,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:38:44" (2/3) ... [2023-11-17 11:38:45,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a137308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:38:45, skipping insertion in model container [2023-11-17 11:38:45,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:38:45" (3/3) ... [2023-11-17 11:38:45,034 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-11-17 11:38:45,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:38:45,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:38:45,099 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:38:45,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:38:45,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 42 transitions, 88 flow [2023-11-17 11:38:45,248 INFO L124 PetriNetUnfolderBase]: 12/57 cut-off events. [2023-11-17 11:38:45,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:45,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 12/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2023-11-17 11:38:45,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 42 transitions, 88 flow [2023-11-17 11:38:45,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 42 transitions, 88 flow [2023-11-17 11:38:45,268 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:45,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 42 transitions, 88 flow [2023-11-17 11:38:45,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 42 transitions, 88 flow [2023-11-17 11:38:45,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 42 transitions, 88 flow [2023-11-17 11:38:45,301 INFO L124 PetriNetUnfolderBase]: 12/57 cut-off events. [2023-11-17 11:38:45,301 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:45,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 12/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2023-11-17 11:38:45,302 INFO L119 LiptonReduction]: Number of co-enabled transitions 782 [2023-11-17 11:38:45,747 INFO L134 LiptonReduction]: Checked pairs total: 1852 [2023-11-17 11:38:45,747 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-11-17 11:38:45,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:45,762 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;@db32c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:45,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:38:45,765 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:45,765 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 11:38:45,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:45,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:45,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:38:45,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:45,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash 9380155, now seen corresponding path program 1 times [2023-11-17 11:38:45,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:45,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979138387] [2023-11-17 11:38:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:45,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:45,926 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 11:38:45,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:45,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979138387] [2023-11-17 11:38:45,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979138387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:45,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:45,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:38:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409535320] [2023-11-17 11:38:45,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:45,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:45,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:45,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 71 [2023-11-17 11:38:45,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 11:38:45,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:45,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 71 [2023-11-17 11:38:45,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:46,001 INFO L124 PetriNetUnfolderBase]: 64/150 cut-off events. [2023-11-17 11:38:46,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:46,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 150 events. 64/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 457 event pairs, 49 based on Foata normal form. 9/141 useless extension candidates. Maximal degree in co-relation 289. Up to 137 conditions per place. [2023-11-17 11:38:46,003 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 22 selfloop transitions, 2 changer transitions 3/29 dead transitions. [2023-11-17 11:38:46,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 29 transitions, 116 flow [2023-11-17 11:38:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2023-11-17 11:38:46,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39906103286384975 [2023-11-17 11:38:46,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2023-11-17 11:38:46,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2023-11-17 11:38:46,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:46,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2023-11-17 11:38:46,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 11:38:46,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:38:46,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 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 11:38:46,022 INFO L175 Difference]: Start difference. First operand has 23 places, 29 transitions, 62 flow. Second operand 3 states and 85 transitions. [2023-11-17 11:38:46,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 29 transitions, 116 flow [2023-11-17 11:38:46,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:46,025 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 46 flow [2023-11-17 11:38:46,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-11-17 11:38:46,028 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-11-17 11:38:46,029 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 46 flow [2023-11-17 11:38:46,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 11:38:46,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:46,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:38:46,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:38:46,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:46,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:46,030 INFO L85 PathProgramCache]: Analyzing trace with hash 424726741, now seen corresponding path program 1 times [2023-11-17 11:38:46,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:46,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437157389] [2023-11-17 11:38:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:46,049 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:46,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:46,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:46,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:38:46,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:38:46,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:38:46,089 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:38:46,092 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:46,092 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:38:46,107 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:38:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 66 transitions, 142 flow [2023-11-17 11:38:46,150 INFO L124 PetriNetUnfolderBase]: 21/97 cut-off events. [2023-11-17 11:38:46,151 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:38:46,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 97 events. 21/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 331 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-11-17 11:38:46,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 66 transitions, 142 flow [2023-11-17 11:38:46,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 66 transitions, 142 flow [2023-11-17 11:38:46,152 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:46,153 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 66 transitions, 142 flow [2023-11-17 11:38:46,153 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 66 transitions, 142 flow [2023-11-17 11:38:46,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 66 transitions, 142 flow [2023-11-17 11:38:46,162 INFO L124 PetriNetUnfolderBase]: 21/97 cut-off events. [2023-11-17 11:38:46,163 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:38:46,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 97 events. 21/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 331 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2023-11-17 11:38:46,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 2668 [2023-11-17 11:38:46,700 INFO L134 LiptonReduction]: Checked pairs total: 6586 [2023-11-17 11:38:46,701 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-11-17 11:38:46,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:46,706 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;@db32c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:46,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:38:46,707 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:46,708 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2023-11-17 11:38:46,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:46,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:46,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:38:46,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:46,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash 12304668, now seen corresponding path program 1 times [2023-11-17 11:38:46,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:46,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256183226] [2023-11-17 11:38:46,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:46,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:46,773 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 11:38:46,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256183226] [2023-11-17 11:38:46,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256183226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:46,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:46,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:38:46,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900480555] [2023-11-17 11:38:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:46,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:46,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 111 [2023-11-17 11:38:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 11:38:46,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:46,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 111 [2023-11-17 11:38:46,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:46,939 INFO L124 PetriNetUnfolderBase]: 1288/2119 cut-off events. [2023-11-17 11:38:46,939 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-17 11:38:46,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4252 conditions, 2119 events. 1288/2119 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10129 event pairs, 1192 based on Foata normal form. 171/2099 useless extension candidates. Maximal degree in co-relation 3449. Up to 2090 conditions per place. [2023-11-17 11:38:46,947 INFO L140 encePairwiseOnDemand]: 93/111 looper letters, 32 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2023-11-17 11:38:46,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 164 flow [2023-11-17 11:38:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-17 11:38:46,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37537537537537535 [2023-11-17 11:38:46,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-17 11:38:46,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-17 11:38:46,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:46,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-17 11:38:46,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 11:38:46,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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 11:38:46,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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 11:38:46,951 INFO L175 Difference]: Start difference. First operand has 35 places, 45 transitions, 100 flow. Second operand 3 states and 125 transitions. [2023-11-17 11:38:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 164 flow [2023-11-17 11:38:46,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:46,952 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 76 flow [2023-11-17 11:38:46,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-11-17 11:38:46,953 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-11-17 11:38:46,953 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 76 flow [2023-11-17 11:38:46,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 11:38:46,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:46,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:38:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:38:46,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:46,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1526800152, now seen corresponding path program 1 times [2023-11-17 11:38:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:46,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013283355] [2023-11-17 11:38:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:46,986 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 11:38:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:46,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013283355] [2023-11-17 11:38:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013283355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:38:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555590540] [2023-11-17 11:38:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:46,999 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 11:38:47,053 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 11:38:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:47,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:38:47,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:38:47,133 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 11:38:47,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:38:47,147 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 11:38:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555590540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:38:47,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:38:47,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:38:47,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499212713] [2023-11-17 11:38:47,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:38:47,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:38:47,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:38:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:38:47,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 111 [2023-11-17 11:38:47,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 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 11:38:47,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:47,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 111 [2023-11-17 11:38:47,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:47,262 INFO L124 PetriNetUnfolderBase]: 376/733 cut-off events. [2023-11-17 11:38:47,262 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-11-17 11:38:47,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1516 conditions, 733 events. 376/733 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3571 event pairs, 70 based on Foata normal form. 90/822 useless extension candidates. Maximal degree in co-relation 1281. Up to 450 conditions per place. [2023-11-17 11:38:47,265 INFO L140 encePairwiseOnDemand]: 108/111 looper letters, 45 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-17 11:38:47,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 216 flow [2023-11-17 11:38:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:38:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:38:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2023-11-17 11:38:47,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2882882882882883 [2023-11-17 11:38:47,267 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 160 transitions. [2023-11-17 11:38:47,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 160 transitions. [2023-11-17 11:38:47,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:47,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 160 transitions. [2023-11-17 11:38:47,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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 11:38:47,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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 11:38:47,269 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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 11:38:47,269 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 76 flow. Second operand 5 states and 160 transitions. [2023-11-17 11:38:47,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 216 flow [2023-11-17 11:38:47,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:38:47,271 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 72 flow [2023-11-17 11:38:47,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-11-17 11:38:47,272 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-11-17 11:38:47,272 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 72 flow [2023-11-17 11:38:47,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 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 11:38:47,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:47,273 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:38:47,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:38:47,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:47,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:47,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1622850448, now seen corresponding path program 1 times [2023-11-17 11:38:47,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:47,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838035200] [2023-11-17 11:38:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:47,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:47,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:47,499 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:47,499 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:47,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:38:47,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:38:47,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:38:47,500 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:38:47,500 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:47,500 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:38:47,513 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:38:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 90 transitions, 198 flow [2023-11-17 11:38:47,525 INFO L124 PetriNetUnfolderBase]: 30/137 cut-off events. [2023-11-17 11:38:47,525 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:38:47,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 30/137 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 509 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2023-11-17 11:38:47,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 90 transitions, 198 flow [2023-11-17 11:38:47,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 90 transitions, 198 flow [2023-11-17 11:38:47,527 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:47,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 90 transitions, 198 flow [2023-11-17 11:38:47,527 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 90 transitions, 198 flow [2023-11-17 11:38:47,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 90 transitions, 198 flow [2023-11-17 11:38:47,546 INFO L124 PetriNetUnfolderBase]: 30/137 cut-off events. [2023-11-17 11:38:47,547 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:38:47,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 30/137 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 509 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2023-11-17 11:38:47,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2023-11-17 11:38:48,385 INFO L134 LiptonReduction]: Checked pairs total: 14172 [2023-11-17 11:38:48,385 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-17 11:38:48,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:48,387 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;@db32c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:48,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:38:48,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:48,388 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2023-11-17 11:38:48,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:48,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:48,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:38:48,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:48,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash 16460542, now seen corresponding path program 1 times [2023-11-17 11:38:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:48,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397959514] [2023-11-17 11:38:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:48,407 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 11:38:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397959514] [2023-11-17 11:38:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397959514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:48,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:48,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:38:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756085607] [2023-11-17 11:38:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:48,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:48,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 153 [2023-11-17 11:38:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 11:38:48,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:48,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 153 [2023-11-17 11:38:48,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:49,933 INFO L124 PetriNetUnfolderBase]: 18136/25702 cut-off events. [2023-11-17 11:38:49,934 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2023-11-17 11:38:49,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51569 conditions, 25702 events. 18136/25702 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 146009 event pairs, 17311 based on Foata normal form. 2358/26330 useless extension candidates. Maximal degree in co-relation 19494. Up to 25499 conditions per place. [2023-11-17 11:38:50,097 INFO L140 encePairwiseOnDemand]: 129/153 looper letters, 41 selfloop transitions, 2 changer transitions 3/50 dead transitions. [2023-11-17 11:38:50,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 210 flow [2023-11-17 11:38:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-17 11:38:50,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3572984749455338 [2023-11-17 11:38:50,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-17 11:38:50,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-17 11:38:50,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:50,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-17 11:38:50,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 11:38:50,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 11:38:50,101 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 11:38:50,101 INFO L175 Difference]: Start difference. First operand has 47 places, 61 transitions, 140 flow. Second operand 3 states and 164 transitions. [2023-11-17 11:38:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 210 flow [2023-11-17 11:38:50,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 208 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:50,103 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 102 flow [2023-11-17 11:38:50,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-11-17 11:38:50,104 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-11-17 11:38:50,104 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 102 flow [2023-11-17 11:38:50,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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 11:38:50,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:50,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:38:50,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:38:50,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:50,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash 800753080, now seen corresponding path program 1 times [2023-11-17 11:38:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:50,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379661881] [2023-11-17 11:38:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:50,132 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 11:38:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379661881] [2023-11-17 11:38:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379661881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:38:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695660234] [2023-11-17 11:38:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:50,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:50,141 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 11:38:50,165 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 11:38:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:50,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:38:50,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:38:50,216 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 11:38:50,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:38:50,228 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 11:38:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695660234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:38:50,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:38:50,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:38:50,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149391149] [2023-11-17 11:38:50,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:38:50,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:38:50,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:50,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:38:50,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:38:50,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 153 [2023-11-17 11:38:50,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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 11:38:50,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:50,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 153 [2023-11-17 11:38:50,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:50,869 INFO L124 PetriNetUnfolderBase]: 5560/8785 cut-off events. [2023-11-17 11:38:50,870 INFO L125 PetriNetUnfolderBase]: For 3257/3257 co-relation queries the response was YES. [2023-11-17 11:38:50,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17912 conditions, 8785 events. 5560/8785 cut-off events. For 3257/3257 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 54431 event pairs, 630 based on Foata normal form. 819/9595 useless extension candidates. Maximal degree in co-relation 2044. Up to 5346 conditions per place. [2023-11-17 11:38:50,903 INFO L140 encePairwiseOnDemand]: 150/153 looper letters, 79 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-11-17 11:38:50,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 366 flow [2023-11-17 11:38:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:38:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:38:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 266 transitions. [2023-11-17 11:38:50,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.289760348583878 [2023-11-17 11:38:50,904 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 266 transitions. [2023-11-17 11:38:50,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 266 transitions. [2023-11-17 11:38:50,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:50,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 266 transitions. [2023-11-17 11:38:50,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 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 11:38:50,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 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 11:38:50,907 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 153.0) internal successors, (1071), 7 states have internal predecessors, (1071), 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 11:38:50,907 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 102 flow. Second operand 6 states and 266 transitions. [2023-11-17 11:38:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 366 flow [2023-11-17 11:38:50,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:38:50,910 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 104 flow [2023-11-17 11:38:50,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 11:38:50,911 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-11-17 11:38:50,911 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 104 flow [2023-11-17 11:38:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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 11:38:50,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:50,911 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:38:50,917 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 11:38:51,117 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,SelfDestructingSolverStorable6 [2023-11-17 11:38:51,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:51,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:51,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1650360852, now seen corresponding path program 1 times [2023-11-17 11:38:51,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:51,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153208323] [2023-11-17 11:38:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:51,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:38:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:38:51,147 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:38:51,147 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:38:51,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:38:51,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:38:51,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:38:51,148 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:38:51,148 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:38:51,148 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:38:51,164 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:38:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 114 transitions, 256 flow [2023-11-17 11:38:51,175 INFO L124 PetriNetUnfolderBase]: 39/177 cut-off events. [2023-11-17 11:38:51,175 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:38:51,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 177 events. 39/177 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 707 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 149. Up to 10 conditions per place. [2023-11-17 11:38:51,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 114 transitions, 256 flow [2023-11-17 11:38:51,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 114 transitions, 256 flow [2023-11-17 11:38:51,177 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:38:51,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 114 transitions, 256 flow [2023-11-17 11:38:51,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 114 transitions, 256 flow [2023-11-17 11:38:51,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 114 transitions, 256 flow [2023-11-17 11:38:51,185 INFO L124 PetriNetUnfolderBase]: 39/177 cut-off events. [2023-11-17 11:38:51,185 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:38:51,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 177 events. 39/177 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 707 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 149. Up to 10 conditions per place. [2023-11-17 11:38:51,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 9752 [2023-11-17 11:38:52,137 INFO L134 LiptonReduction]: Checked pairs total: 24318 [2023-11-17 11:38:52,138 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-11-17 11:38:52,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:38:52,139 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;@db32c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:38:52,139 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:38:52,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:38:52,140 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2023-11-17 11:38:52,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:38:52,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:52,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:38:52,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:38:52,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash 21909354, now seen corresponding path program 1 times [2023-11-17 11:38:52,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:52,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058272716] [2023-11-17 11:38:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:52,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:52,156 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 11:38:52,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:52,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058272716] [2023-11-17 11:38:52,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058272716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:52,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:38:52,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:38:52,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392189283] [2023-11-17 11:38:52,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:52,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:38:52,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:38:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:38:52,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 194 [2023-11-17 11:38:52,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 11:38:52,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:52,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 194 [2023-11-17 11:38:52,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:09,131 INFO L124 PetriNetUnfolderBase]: 222256/290524 cut-off events. [2023-11-17 11:39:09,132 INFO L125 PetriNetUnfolderBase]: For 8406/8406 co-relation queries the response was YES. [2023-11-17 11:39:09,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583206 conditions, 290524 events. 222256/290524 cut-off events. For 8406/8406 co-relation queries the response was YES. Maximal size of possible extension queue 5688. Compared 1813258 event pairs, 163224 based on Foata normal form. 28602/303547 useless extension candidates. Maximal degree in co-relation 51679. Up to 288668 conditions per place. [2023-11-17 11:39:10,136 INFO L140 encePairwiseOnDemand]: 164/194 looper letters, 50 selfloop transitions, 2 changer transitions 3/60 dead transitions. [2023-11-17 11:39:10,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 258 flow [2023-11-17 11:39:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:39:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:39:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2023-11-17 11:39:10,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487972508591065 [2023-11-17 11:39:10,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 203 transitions. [2023-11-17 11:39:10,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 203 transitions. [2023-11-17 11:39:10,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:10,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 203 transitions. [2023-11-17 11:39:10,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 11:39:10,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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 11:39:10,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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 11:39:10,140 INFO L175 Difference]: Start difference. First operand has 59 places, 77 transitions, 182 flow. Second operand 3 states and 203 transitions. [2023-11-17 11:39:10,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 258 flow [2023-11-17 11:39:10,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 252 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:39:10,149 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 128 flow [2023-11-17 11:39:10,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-11-17 11:39:10,150 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-17 11:39:10,150 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 128 flow [2023-11-17 11:39:10,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 11:39:10,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:10,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:10,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:39:10,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:10,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -62339892, now seen corresponding path program 1 times [2023-11-17 11:39:10,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:10,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216789467] [2023-11-17 11:39:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:10,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:10,172 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 11:39:10,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216789467] [2023-11-17 11:39:10,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216789467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:39:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442258538] [2023-11-17 11:39:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:10,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:39:10,174 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 11:39:10,176 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 11:39:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:10,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:39:10,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:39:10,261 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 11:39:10,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:39:10,277 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 11:39:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442258538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:39:10,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:39:10,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:39:10,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118722282] [2023-11-17 11:39:10,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:39:10,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:39:10,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:39:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:39:10,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 194 [2023-11-17 11:39:10,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 40.285714285714285) internal successors, (282), 7 states have internal predecessors, (282), 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 11:39:10,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:10,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 194 [2023-11-17 11:39:10,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:39:19,662 INFO L124 PetriNetUnfolderBase]: 139696/182530 cut-off events. [2023-11-17 11:39:19,662 INFO L125 PetriNetUnfolderBase]: For 14183/14183 co-relation queries the response was YES. [2023-11-17 11:39:19,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380469 conditions, 182530 events. 139696/182530 cut-off events. For 14183/14183 co-relation queries the response was YES. Maximal size of possible extension queue 3791. Compared 1135653 event pairs, 17235 based on Foata normal form. 819/183259 useless extension candidates. Maximal degree in co-relation 43300. Up to 119557 conditions per place. [2023-11-17 11:39:20,621 INFO L140 encePairwiseOnDemand]: 190/194 looper letters, 123 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-17 11:39:20,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 134 transitions, 562 flow [2023-11-17 11:39:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:39:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:39:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2023-11-17 11:39:20,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30927835051546393 [2023-11-17 11:39:20,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2023-11-17 11:39:20,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2023-11-17 11:39:20,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:39:20,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2023-11-17 11:39:20,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:39:20,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 194.0) internal successors, (1358), 7 states have internal predecessors, (1358), 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 11:39:20,631 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 194.0) internal successors, (1358), 7 states have internal predecessors, (1358), 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 11:39:20,631 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 128 flow. Second operand 6 states and 360 transitions. [2023-11-17 11:39:20,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 134 transitions, 562 flow [2023-11-17 11:39:20,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 134 transitions, 560 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:39:20,648 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 166 flow [2023-11-17 11:39:20,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-11-17 11:39:20,650 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2023-11-17 11:39:20,650 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 166 flow [2023-11-17 11:39:20,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.285714285714285) internal successors, (282), 7 states have internal predecessors, (282), 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 11:39:20,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:20,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:39:20,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:39:20,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:39:20,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:20,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:20,859 INFO L85 PathProgramCache]: Analyzing trace with hash -187788235, now seen corresponding path program 1 times [2023-11-17 11:39:20,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47315839] [2023-11-17 11:39:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:20,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:39:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:39:20,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:39:20,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:39:20,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 11:39:20,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 11:39:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:39:20,901 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:39:20,902 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:39:20,902 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:39:20,926 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:39:20,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 138 transitions, 316 flow [2023-11-17 11:39:20,940 INFO L124 PetriNetUnfolderBase]: 48/217 cut-off events. [2023-11-17 11:39:20,940 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:39:20,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 217 events. 48/217 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 896 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 195. Up to 12 conditions per place. [2023-11-17 11:39:20,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 138 transitions, 316 flow [2023-11-17 11:39:20,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 138 transitions, 316 flow [2023-11-17 11:39:20,942 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:39:20,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 138 transitions, 316 flow [2023-11-17 11:39:20,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 138 transitions, 316 flow [2023-11-17 11:39:20,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 138 transitions, 316 flow [2023-11-17 11:39:20,953 INFO L124 PetriNetUnfolderBase]: 48/217 cut-off events. [2023-11-17 11:39:20,954 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:39:20,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 217 events. 48/217 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 896 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 195. Up to 12 conditions per place. [2023-11-17 11:39:20,960 INFO L119 LiptonReduction]: Number of co-enabled transitions 14950 [2023-11-17 11:39:22,350 INFO L134 LiptonReduction]: Checked pairs total: 36462 [2023-11-17 11:39:22,350 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-17 11:39:22,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:39:22,351 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;@db32c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:39:22,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 11:39:22,353 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:39:22,354 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2023-11-17 11:39:22,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:39:22,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:39:22,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:39:22,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 11:39:22,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:39:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash 28620302, now seen corresponding path program 1 times [2023-11-17 11:39:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:39:22,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478406689] [2023-11-17 11:39:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:39:22,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:39:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:39:22,381 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 11:39:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:39:22,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478406689] [2023-11-17 11:39:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478406689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:39:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:39:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:39:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004628810] [2023-11-17 11:39:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:39:22,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:39:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:39:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:39:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:39:22,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 234 [2023-11-17 11:39:22,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 11:39:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:39:22,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 234 [2023-11-17 11:39:22,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand