/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:35:15,527 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:35:15,618 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 15:35:15,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:35:15,651 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:35:15,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:35:15,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:35:15,652 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:35:15,653 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:35:15,656 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:35:15,657 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:35:15,657 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:35:15,657 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:35:15,659 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:35:15,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:35:15,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:35:15,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:35:15,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:35:15,660 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:35:15,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:35:15,660 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:35:15,661 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:35:15,661 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:35:15,661 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:35:15,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:35:15,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:35:15,662 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:35:15,662 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:35:15,662 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:35:15,662 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:35:15,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:35:15,663 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:35:15,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:35:15,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:35:15,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:35:15,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:35:15,926 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:35:15,926 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:35:15,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-11-17 15:35:17,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:35:17,445 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:35:17,446 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-11-17 15:35:17,466 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/710a5fda4/698cf25fe87f446ebfa243ccd80e4467/FLAGe26eb9e49 [2023-11-17 15:35:17,478 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/710a5fda4/698cf25fe87f446ebfa243ccd80e4467 [2023-11-17 15:35:17,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:35:17,481 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:35:17,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:35:17,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:35:17,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:35:17,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:17" (1/1) ... [2023-11-17 15:35:17,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d54940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:17, skipping insertion in model container [2023-11-17 15:35:17,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:35:17" (1/1) ... [2023-11-17 15:35:17,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:35:17,901 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_07-cond_racing2.i[41322,41335] [2023-11-17 15:35:17,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:35:17,942 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:35:17,995 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_07-cond_racing2.i[41322,41335] [2023-11-17 15:35:18,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:35:18,055 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:35:18,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18 WrapperNode [2023-11-17 15:35:18,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:35:18,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:35:18,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:35:18,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:35:18,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,100 INFO L138 Inliner]: procedures = 271, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-17 15:35:18,100 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:35:18,101 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:35:18,101 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:35:18,101 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:35:18,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,121 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,128 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,139 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:35:18,140 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:35:18,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:35:18,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:35:18,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (1/1) ... [2023-11-17 15:35:18,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:35:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:35:18,171 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 15:35:18,176 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 15:35:18,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:35:18,196 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:35:18,197 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:35:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:35:18,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:35:18,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:35:18,198 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 15:35:18,323 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:35:18,326 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:35:18,582 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:35:18,615 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:35:18,616 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:35:18,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:35:18 BoogieIcfgContainer [2023-11-17 15:35:18,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:35:18,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:35:18,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:35:18,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:35:18,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:35:17" (1/3) ... [2023-11-17 15:35:18,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3993be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:18, skipping insertion in model container [2023-11-17 15:35:18,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:35:18" (2/3) ... [2023-11-17 15:35:18,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3993be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:35:18, skipping insertion in model container [2023-11-17 15:35:18,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:35:18" (3/3) ... [2023-11-17 15:35:18,631 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-11-17 15:35:18,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:35:18,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:35:18,648 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:35:18,711 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:35:18,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 131 transitions, 269 flow [2023-11-17 15:35:18,822 INFO L124 PetriNetUnfolderBase]: 23/180 cut-off events. [2023-11-17 15:35:18,822 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:35:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 180 events. 23/180 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 441 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-11-17 15:35:18,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 131 transitions, 269 flow [2023-11-17 15:35:18,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:18,848 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:18,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:18,877 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:18,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 126 transitions, 256 flow [2023-11-17 15:35:18,910 INFO L124 PetriNetUnfolderBase]: 22/175 cut-off events. [2023-11-17 15:35:18,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:18,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 175 events. 22/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 427 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-11-17 15:35:18,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 3410 [2023-11-17 15:35:22,211 INFO L134 LiptonReduction]: Checked pairs total: 4892 [2023-11-17 15:35:22,212 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-17 15:35:22,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:22,232 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;@cf4c037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:22,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:22,236 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:22,236 INFO L124 PetriNetUnfolderBase]: 4/15 cut-off events. [2023-11-17 15:35:22,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:22,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:22,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:22,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:22,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 16922031, now seen corresponding path program 1 times [2023-11-17 15:35:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:22,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886236498] [2023-11-17 15:35:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:22,513 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 15:35:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886236498] [2023-11-17 15:35:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886236498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:22,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:22,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423834105] [2023-11-17 15:35:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:22,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:22,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:22,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:22,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 252 [2023-11-17 15:35:22,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 33 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 15:35:22,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:22,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 252 [2023-11-17 15:35:22,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:22,659 INFO L124 PetriNetUnfolderBase]: 97/217 cut-off events. [2023-11-17 15:35:22,659 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:22,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 217 events. 97/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 952 event pairs, 0 based on Foata normal form. 12/193 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2023-11-17 15:35:22,661 INFO L140 encePairwiseOnDemand]: 239/252 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2023-11-17 15:35:22,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 132 flow [2023-11-17 15:35:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-11-17 15:35:22,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-11-17 15:35:22,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-11-17 15:35:22,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-11-17 15:35:22,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:22,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-11-17 15:35:22,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 15:35:22,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 15:35:22,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 15:35:22,691 INFO L175 Difference]: Start difference. First operand has 26 places, 33 transitions, 70 flow. Second operand 3 states and 342 transitions. [2023-11-17 15:35:22,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 132 flow [2023-11-17 15:35:22,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:35:22,696 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 46 flow [2023-11-17 15:35:22,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2023-11-17 15:35:22,701 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-11-17 15:35:22,701 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 46 flow [2023-11-17 15:35:22,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 15:35:22,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:22,702 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:35:22,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:35:22,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:22,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:22,703 INFO L85 PathProgramCache]: Analyzing trace with hash -956956568, now seen corresponding path program 1 times [2023-11-17 15:35:22,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:22,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907135290] [2023-11-17 15:35:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:22,726 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:35:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:22,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:35:22,759 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:35:22,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:35:22,763 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:35:22,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:35:22,763 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:35:22,769 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:35:22,769 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:35:22,802 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:35:22,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:22,850 INFO L124 PetriNetUnfolderBase]: 40/288 cut-off events. [2023-11-17 15:35:22,850 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:35:22,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 288 events. 40/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 895 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 182. Up to 9 conditions per place. [2023-11-17 15:35:22,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:22,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:22,860 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:22,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:22,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:22,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 164 transitions, 344 flow [2023-11-17 15:35:22,888 INFO L124 PetriNetUnfolderBase]: 40/288 cut-off events. [2023-11-17 15:35:22,888 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:35:22,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 288 events. 40/288 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 895 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 182. Up to 9 conditions per place. [2023-11-17 15:35:22,897 INFO L119 LiptonReduction]: Number of co-enabled transitions 9424 [2023-11-17 15:35:26,468 INFO L134 LiptonReduction]: Checked pairs total: 17911 [2023-11-17 15:35:26,469 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-17 15:35:26,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:26,472 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;@cf4c037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:26,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:26,474 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:26,475 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:35:26,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:26,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:26,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:26,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:26,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 27508934, now seen corresponding path program 1 times [2023-11-17 15:35:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:26,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079087568] [2023-11-17 15:35:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:26,545 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 15:35:26,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079087568] [2023-11-17 15:35:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079087568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:26,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:26,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:26,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423833469] [2023-11-17 15:35:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:26,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:26,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 311 [2023-11-17 15:35:26,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 58 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 15:35:26,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:26,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 311 [2023-11-17 15:35:26,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:26,919 INFO L124 PetriNetUnfolderBase]: 2033/3356 cut-off events. [2023-11-17 15:35:26,919 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-17 15:35:26,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6650 conditions, 3356 events. 2033/3356 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 19094 event pairs, 920 based on Foata normal form. 245/3180 useless extension candidates. Maximal degree in co-relation 788. Up to 3234 conditions per place. [2023-11-17 15:35:26,934 INFO L140 encePairwiseOnDemand]: 292/311 looper letters, 32 selfloop transitions, 2 changer transitions 11/52 dead transitions. [2023-11-17 15:35:26,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 208 flow [2023-11-17 15:35:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-11-17 15:35:26,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480171489817792 [2023-11-17 15:35:26,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-11-17 15:35:26,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-11-17 15:35:26,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:26,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-11-17 15:35:26,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:26,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 15:35:26,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 15:35:26,947 INFO L175 Difference]: Start difference. First operand has 45 places, 58 transitions, 132 flow. Second operand 3 states and 418 transitions. [2023-11-17 15:35:26,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 208 flow [2023-11-17 15:35:26,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:35:26,950 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 86 flow [2023-11-17 15:35:26,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-11-17 15:35:26,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-11-17 15:35:26,951 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 86 flow [2023-11-17 15:35:26,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 15:35:26,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:26,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:35:26,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:35:26,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:26,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -22698908, now seen corresponding path program 1 times [2023-11-17 15:35:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:26,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116946025] [2023-11-17 15:35:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:35:27,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:27,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116946025] [2023-11-17 15:35:27,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116946025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:27,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:27,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:35:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058269842] [2023-11-17 15:35:27,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:27,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:27,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:27,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 311 [2023-11-17 15:35:27,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 15:35:27,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:27,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 311 [2023-11-17 15:35:27,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:27,295 INFO L124 PetriNetUnfolderBase]: 1224/2028 cut-off events. [2023-11-17 15:35:27,295 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2023-11-17 15:35:27,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 2028 events. 1224/2028 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9750 event pairs, 475 based on Foata normal form. 20/2047 useless extension candidates. Maximal degree in co-relation 4262. Up to 1777 conditions per place. [2023-11-17 15:35:27,308 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 40 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-11-17 15:35:27,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 212 flow [2023-11-17 15:35:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-17 15:35:27,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180064308681672 [2023-11-17 15:35:27,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-17 15:35:27,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-17 15:35:27,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:27,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-17 15:35:27,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 15:35:27,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 15:35:27,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 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 15:35:27,316 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 86 flow. Second operand 3 states and 390 transitions. [2023-11-17 15:35:27,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 212 flow [2023-11-17 15:35:27,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:35:27,319 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 103 flow [2023-11-17 15:35:27,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-17 15:35:27,321 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-11-17 15:35:27,321 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 103 flow [2023-11-17 15:35:27,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 15:35:27,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:27,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:35:27,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:35:27,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:27,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash 846650250, now seen corresponding path program 1 times [2023-11-17 15:35:27,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:27,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914333360] [2023-11-17 15:35:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:27,346 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:35:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:27,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:35:27,361 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:35:27,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:35:27,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:35:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:35:27,362 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:35:27,362 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:35:27,362 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:35:27,380 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:35:27,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:27,422 INFO L124 PetriNetUnfolderBase]: 62/431 cut-off events. [2023-11-17 15:35:27,423 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:35:27,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 431 events. 62/431 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1496 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-11-17 15:35:27,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:27,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:27,429 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:27,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:27,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:27,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 197 transitions, 421 flow [2023-11-17 15:35:27,482 INFO L124 PetriNetUnfolderBase]: 62/431 cut-off events. [2023-11-17 15:35:27,483 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:35:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 431 events. 62/431 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1496 event pairs, 1 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-11-17 15:35:27,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 17298 [2023-11-17 15:35:31,079 INFO L134 LiptonReduction]: Checked pairs total: 35657 [2023-11-17 15:35:31,079 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-11-17 15:35:31,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:31,082 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;@cf4c037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:31,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:31,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:31,084 INFO L124 PetriNetUnfolderBase]: 4/15 cut-off events. [2023-11-17 15:35:31,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:31,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:31,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:31,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:31,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash 40002739, now seen corresponding path program 1 times [2023-11-17 15:35:31,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832806533] [2023-11-17 15:35:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:31,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:31,112 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 15:35:31,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832806533] [2023-11-17 15:35:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832806533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:31,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:31,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864637348] [2023-11-17 15:35:31,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:31,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 373 [2023-11-17 15:35:31,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 77 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 15:35:31,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:31,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 373 [2023-11-17 15:35:31,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:34,035 INFO L124 PetriNetUnfolderBase]: 23016/34051 cut-off events. [2023-11-17 15:35:34,035 INFO L125 PetriNetUnfolderBase]: For 1001/1001 co-relation queries the response was YES. [2023-11-17 15:35:34,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66908 conditions, 34051 events. 23016/34051 cut-off events. For 1001/1001 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 233572 event pairs, 14665 based on Foata normal form. 3058/33833 useless extension candidates. Maximal degree in co-relation 7033. Up to 32263 conditions per place. [2023-11-17 15:35:34,166 INFO L140 encePairwiseOnDemand]: 348/373 looper letters, 38 selfloop transitions, 2 changer transitions 12/64 dead transitions. [2023-11-17 15:35:34,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 257 flow [2023-11-17 15:35:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-11-17 15:35:34,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361036639857015 [2023-11-17 15:35:34,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-11-17 15:35:34,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-11-17 15:35:34,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:34,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-11-17 15:35:34,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 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 15:35:34,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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 15:35:34,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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 15:35:34,173 INFO L175 Difference]: Start difference. First operand has 59 places, 77 transitions, 181 flow. Second operand 3 states and 488 transitions. [2023-11-17 15:35:34,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 257 flow [2023-11-17 15:35:34,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:35:34,178 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 118 flow [2023-11-17 15:35:34,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-11-17 15:35:34,181 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-11-17 15:35:34,182 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 118 flow [2023-11-17 15:35:34,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 15:35:34,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:34,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:35:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:35:34,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:34,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -860949998, now seen corresponding path program 1 times [2023-11-17 15:35:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:34,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108140458] [2023-11-17 15:35:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:35:34,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:34,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108140458] [2023-11-17 15:35:34,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108140458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:34,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:34,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:35:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126987948] [2023-11-17 15:35:34,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:34,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 373 [2023-11-17 15:35:34,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:34,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:34,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 373 [2023-11-17 15:35:34,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:36,204 INFO L124 PetriNetUnfolderBase]: 21602/30429 cut-off events. [2023-11-17 15:35:36,204 INFO L125 PetriNetUnfolderBase]: For 3694/3694 co-relation queries the response was YES. [2023-11-17 15:35:36,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64191 conditions, 30429 events. 21602/30429 cut-off events. For 3694/3694 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 176488 event pairs, 9212 based on Foata normal form. 84/30507 useless extension candidates. Maximal degree in co-relation 64109. Up to 29085 conditions per place. [2023-11-17 15:35:36,377 INFO L140 encePairwiseOnDemand]: 368/373 looper letters, 55 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-11-17 15:35:36,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 293 flow [2023-11-17 15:35:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:35:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:35:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-11-17 15:35:36,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40303842716711347 [2023-11-17 15:35:36,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-11-17 15:35:36,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-11-17 15:35:36,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:36,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-11-17 15:35:36,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 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 15:35:36,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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 15:35:36,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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 15:35:36,383 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 118 flow. Second operand 3 states and 451 transitions. [2023-11-17 15:35:36,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 293 flow [2023-11-17 15:35:36,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 286 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 15:35:36,391 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 140 flow [2023-11-17 15:35:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-17 15:35:36,392 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-11-17 15:35:36,392 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 140 flow [2023-11-17 15:35:36,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:36,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:36,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:35:36,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:35:36,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:36,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash -686161219, now seen corresponding path program 1 times [2023-11-17 15:35:36,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:36,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615175871] [2023-11-17 15:35:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:36,470 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 15:35:36,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615175871] [2023-11-17 15:35:36,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615175871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:35:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097919195] [2023-11-17 15:35:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:36,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:35:36,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:35:36,477 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 15:35:36,506 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 15:35:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:36,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:35:36,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:35:36,639 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 15:35:36,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:35:36,682 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 15:35:36,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097919195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:35:36,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:35:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:35:36,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948407996] [2023-11-17 15:35:36,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:35:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:35:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:36,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:35:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:35:36,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 373 [2023-11-17 15:35:36,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 138.85714285714286) internal successors, (972), 7 states have internal predecessors, (972), 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 15:35:36,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:36,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 373 [2023-11-17 15:35:36,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:35:37,451 INFO L124 PetriNetUnfolderBase]: 5367/8506 cut-off events. [2023-11-17 15:35:37,452 INFO L125 PetriNetUnfolderBase]: For 2606/2606 co-relation queries the response was YES. [2023-11-17 15:35:37,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17790 conditions, 8506 events. 5367/8506 cut-off events. For 2606/2606 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 54189 event pairs, 528 based on Foata normal form. 839/9334 useless extension candidates. Maximal degree in co-relation 11378. Up to 5350 conditions per place. [2023-11-17 15:35:37,506 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 77 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-11-17 15:35:37,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 404 flow [2023-11-17 15:35:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:35:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:35:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 897 transitions. [2023-11-17 15:35:37,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008042895442359 [2023-11-17 15:35:37,509 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 897 transitions. [2023-11-17 15:35:37,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 897 transitions. [2023-11-17 15:35:37,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:35:37,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 897 transitions. [2023-11-17 15:35:37,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 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 15:35:37,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 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 15:35:37,516 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 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 15:35:37,516 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 140 flow. Second operand 6 states and 897 transitions. [2023-11-17 15:35:37,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 404 flow [2023-11-17 15:35:37,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:35:37,522 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 138 flow [2023-11-17 15:35:37,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-11-17 15:35:37,524 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-11-17 15:35:37,524 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 138 flow [2023-11-17 15:35:37,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.85714285714286) internal successors, (972), 7 states have internal predecessors, (972), 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 15:35:37,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:37,525 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:35:37,534 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 15:35:37,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:35:37,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:37,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:37,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1353912068, now seen corresponding path program 1 times [2023-11-17 15:35:37,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:37,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128538540] [2023-11-17 15:35:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:37,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:37,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:35:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:35:37,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:35:37,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:35:37,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:35:37,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:35:37,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:35:37,773 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:35:37,774 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:35:37,774 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:35:37,804 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:35:37,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:37,872 INFO L124 PetriNetUnfolderBase]: 96/646 cut-off events. [2023-11-17 15:35:37,872 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:35:37,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 646 events. 96/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2521 event pairs, 6 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 451. Up to 32 conditions per place. [2023-11-17 15:35:37,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:37,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:37,885 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:35:37,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:37,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:37,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 230 transitions, 500 flow [2023-11-17 15:35:37,947 INFO L124 PetriNetUnfolderBase]: 96/646 cut-off events. [2023-11-17 15:35:37,948 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:35:37,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 646 events. 96/646 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2521 event pairs, 6 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 451. Up to 32 conditions per place. [2023-11-17 15:35:38,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 27280 [2023-11-17 15:35:41,881 INFO L134 LiptonReduction]: Checked pairs total: 64535 [2023-11-17 15:35:41,881 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-11-17 15:35:41,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:35:41,883 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;@cf4c037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:35:41,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:35:41,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:35:41,885 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-11-17 15:35:41,885 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:35:41,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:35:41,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:35:41,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:35:41,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:35:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash 54295004, now seen corresponding path program 1 times [2023-11-17 15:35:41,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:35:41,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832992092] [2023-11-17 15:35:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:35:41,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:35:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:35:41,912 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 15:35:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:35:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832992092] [2023-11-17 15:35:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832992092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:35:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:35:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:35:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414962954] [2023-11-17 15:35:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:35:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:35:41,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:35:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:35:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:35:41,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 431 [2023-11-17 15:35:41,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 96 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:35:41,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:35:41,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 431 [2023-11-17 15:35:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:22,341 INFO L124 PetriNetUnfolderBase]: 411961/550987 cut-off events. [2023-11-17 15:36:22,341 INFO L125 PetriNetUnfolderBase]: For 19026/19026 co-relation queries the response was YES. [2023-11-17 15:36:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093396 conditions, 550987 events. 411961/550987 cut-off events. For 19026/19026 co-relation queries the response was YES. Maximal size of possible extension queue 10893. Compared 4035655 event pairs, 298148 based on Foata normal form. 48369/558576 useless extension candidates. Maximal degree in co-relation 94456. Up to 533334 conditions per place. [2023-11-17 15:36:24,940 INFO L140 encePairwiseOnDemand]: 400/431 looper letters, 52 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2023-11-17 15:36:24,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 330 flow [2023-11-17 15:36:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-11-17 15:36:24,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377416860015468 [2023-11-17 15:36:24,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-11-17 15:36:24,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-11-17 15:36:24,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:24,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-11-17 15:36:24,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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 15:36:24,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 15:36:24,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 15:36:24,966 INFO L175 Difference]: Start difference. First operand has 73 places, 96 transitions, 232 flow. Second operand 3 states and 566 transitions. [2023-11-17 15:36:24,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 330 flow [2023-11-17 15:36:24,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:24,986 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 152 flow [2023-11-17 15:36:24,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-11-17 15:36:24,987 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-11-17 15:36:24,987 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 152 flow [2023-11-17 15:36:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:24,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:36:24,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:36:24,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash 561897051, now seen corresponding path program 1 times [2023-11-17 15:36:24,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:24,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994461202] [2023-11-17 15:36:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:36:25,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994461202] [2023-11-17 15:36:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994461202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:25,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:25,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:25,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659891565] [2023-11-17 15:36:25,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:25,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:25,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:25,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:25,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 431 [2023-11-17 15:36:25,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 15:36:25,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:25,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 431 [2023-11-17 15:36:25,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand