/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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-dev-ac9dbd0-m [2023-08-24 12:36:50,650 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:36:50,733 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-VariableLbe.epf [2023-08-24 12:36:50,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:36:50,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:36:50,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:36:50,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:36:50,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:36:50,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:36:50,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:36:50,771 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:36:50,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:36:50,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:36:50,773 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:36:50,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:36:50,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:36:50,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:36:50,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:36:50,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:36:50,774 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:36:50,775 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:36:50,775 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:36:50,776 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:36:50,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:36:50,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:36:50,777 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:36:50,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:36:50,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:36:50,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:36:50,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:36:50,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:36:50,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:36:50,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:36:50,779 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:36:50,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:36:50,779 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:36:51,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:36:51,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:36:51,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:36:51,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:36:51,129 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:36:51,131 INFO L431 ainManager$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 [2023-08-24 12:36:52,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:36:52,680 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:36:52,681 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-24 12:36:52,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0da707442/161b38ae21a54dcf90a5121d36f87711/FLAG4b5e54f5c [2023-08-24 12:36:52,721 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0da707442/161b38ae21a54dcf90a5121d36f87711 [2023-08-24 12:36:52,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:36:52,725 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:36:52,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:36:52,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:36:52,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:36:52,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:36:52" (1/1) ... [2023-08-24 12:36:52,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62fcd2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:52, skipping insertion in model container [2023-08-24 12:36:52,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:36:52" (1/1) ... [2023-08-24 12:36:52,766 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:36:53,166 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] [2023-08-24 12:36:53,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:36:53,210 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:36:53,226 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [119] [2023-08-24 12:36:53,248 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-24 12:36:53,248 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-24 12:36:53,259 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] [2023-08-24 12:36:53,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:36:53,350 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:36:53,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53 WrapperNode [2023-08-24 12:36:53,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:36:53,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:36:53,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:36:53,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:36:53,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,421 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2023-08-24 12:36:53,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:36:53,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:36:53,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:36:53,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:36:53,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,457 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,460 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:36:53,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:36:53,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:36:53,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:36:53,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (1/1) ... [2023-08-24 12:36:53,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:36:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:36:53,510 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) [2023-08-24 12:36:53,537 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 [2023-08-24 12:36:53,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:36:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:36:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:36:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:36:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:36:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:36:53,554 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:36:53,555 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:36:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:36:53,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:36:53,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:36:53,556 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 12:36:53,735 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:36:53,738 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:36:53,984 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:36:53,993 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:36:53,993 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 12:36:53,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:36:53 BoogieIcfgContainer [2023-08-24 12:36:53,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:36:53,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:36:53,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:36:54,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:36:54,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:36:52" (1/3) ... [2023-08-24 12:36:54,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c650054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:36:54, skipping insertion in model container [2023-08-24 12:36:54,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:36:53" (2/3) ... [2023-08-24 12:36:54,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c650054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:36:54, skipping insertion in model container [2023-08-24 12:36:54,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:36:53" (3/3) ... [2023-08-24 12:36:54,005 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-08-24 12:36:54,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:36:54,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:36:54,023 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:36:54,124 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:36:54,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:36:54,209 INFO L124 PetriNetUnfolderBase]: 23/167 cut-off events. [2023-08-24 12:36:54,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:36:54,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 23/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:36:54,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:36:54,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:54,225 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:36:54,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:54,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:54,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:54,293 INFO L124 PetriNetUnfolderBase]: 22/162 cut-off events. [2023-08-24 12:36:54,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:36:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 162 events. 22/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 358 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:36:54,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-24 12:36:57,716 INFO L134 LiptonReduction]: Checked pairs total: 4793 [2023-08-24 12:36:57,716 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-24 12:36:57,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:36:57,733 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:36:57,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:36:57,738 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:36:57,739 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 12:36:57,739 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:36:57,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:36:57,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:36:57,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:36:57,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:36:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash 14648327, now seen corresponding path program 1 times [2023-08-24 12:36:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:36:57,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122752035] [2023-08-24 12:36:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:36:57,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:36:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:36:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:36:58,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:36:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122752035] [2023-08-24 12:36:58,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122752035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:36:58,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:36:58,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:36:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581918281] [2023-08-24 12:36:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:36:58,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:36:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:36:58,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:36:58,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:36:58,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2023-08-24 12:36:58,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2023-08-24 12:36:58,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:36:58,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2023-08-24 12:36:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:36:58,142 INFO L124 PetriNetUnfolderBase]: 97/217 cut-off events. [2023-08-24 12:36:58,142 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:36:58,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 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 943 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. [2023-08-24 12:36:58,147 INFO L140 encePairwiseOnDemand]: 217/229 looper letters, 21 selfloop transitions, 2 changer transitions 9/33 dead transitions. [2023-08-24 12:36:58,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2023-08-24 12:36:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:36:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:36:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-24 12:36:58,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094614264919942 [2023-08-24 12:36:58,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-24 12:36:58,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-24 12:36:58,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:36:58,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-24 12:36:58,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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) [2023-08-24 12:36:58,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2023-08-24 12:36:58,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2023-08-24 12:36:58,175 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 350 transitions. [2023-08-24 12:36:58,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2023-08-24 12:36:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:36:58,179 INFO L231 Difference]: Finished difference. Result has 29 places, 16 transitions, 43 flow [2023-08-24 12:36:58,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=53, 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=43, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2023-08-24 12:36:58,185 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-24 12:36:58,186 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 43 flow [2023-08-24 12:36:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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) [2023-08-24 12:36:58,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:36:58,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:36:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:36:58,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:36:58,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:36:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1554425363, now seen corresponding path program 1 times [2023-08-24 12:36:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:36:58,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63120755] [2023-08-24 12:36:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:36:58,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:36:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:36:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:36:58,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:36:58,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63120755] [2023-08-24 12:36:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63120755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:36:58,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:36:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:36:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987468152] [2023-08-24 12:36:58,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:36:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:36:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:36:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:36:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:36:58,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 229 [2023-08-24 12:36:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2023-08-24 12:36:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:36:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 229 [2023-08-24 12:36:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:36:58,379 INFO L124 PetriNetUnfolderBase]: 37/91 cut-off events. [2023-08-24 12:36:58,380 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-24 12:36:58,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 91 events. 37/91 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 230 event pairs, 13 based on Foata normal form. 3/93 useless extension candidates. Maximal degree in co-relation 202. Up to 66 conditions per place. [2023-08-24 12:36:58,380 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 16 selfloop transitions, 2 changer transitions 1/20 dead transitions. [2023-08-24 12:36:58,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 94 flow [2023-08-24 12:36:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:36:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:36:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-24 12:36:58,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47889374090247455 [2023-08-24 12:36:58,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-24 12:36:58,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-24 12:36:58,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:36:58,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-24 12:36:58,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:36:58,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2023-08-24 12:36:58,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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) [2023-08-24 12:36:58,395 INFO L175 Difference]: Start difference. First operand has 29 places, 16 transitions, 43 flow. Second operand 3 states and 329 transitions. [2023-08-24 12:36:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 94 flow [2023-08-24 12:36:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 12:36:58,397 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 47 flow [2023-08-24 12:36:58,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-24 12:36:58,398 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-24 12:36:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 47 flow [2023-08-24 12:36:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2023-08-24 12:36:58,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:36:58,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:36:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 12:36:58,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:36:58,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:36:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1693761960, now seen corresponding path program 1 times [2023-08-24 12:36:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:36:58,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983602569] [2023-08-24 12:36:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:36:58,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:36:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:36:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:36:58,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:36:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983602569] [2023-08-24 12:36:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983602569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:36:58,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38077545] [2023-08-24 12:36:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:36:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:36:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:36:58,531 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) [2023-08-24 12:36:58,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 12:36:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:36:58,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:36:58,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:36:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:36:58,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:36:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:36:58,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38077545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:36:58,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:36:58,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:36:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994545941] [2023-08-24 12:36:58,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:36:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:36:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:36:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:36:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:36:58,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2023-08-24 12:36:58,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 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) [2023-08-24 12:36:58,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:36:58,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2023-08-24 12:36:58,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:36:58,749 INFO L124 PetriNetUnfolderBase]: 16/46 cut-off events. [2023-08-24 12:36:58,749 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 12:36:58,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 46 events. 16/46 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 7 based on Foata normal form. 9/55 useless extension candidates. Maximal degree in co-relation 100. Up to 34 conditions per place. [2023-08-24 12:36:58,750 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-24 12:36:58,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 100 flow [2023-08-24 12:36:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:36:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:36:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2023-08-24 12:36:58,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650655021834061 [2023-08-24 12:36:58,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2023-08-24 12:36:58,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2023-08-24 12:36:58,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:36:58,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2023-08-24 12:36:58,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 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) [2023-08-24 12:36:58,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 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) [2023-08-24 12:36:58,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 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) [2023-08-24 12:36:58,756 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 47 flow. Second operand 4 states and 426 transitions. [2023-08-24 12:36:58,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 100 flow [2023-08-24 12:36:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 12:36:58,758 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-24 12:36:58,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-24 12:36:58,759 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-24 12:36:58,759 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-24 12:36:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 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) [2023-08-24 12:36:58,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:36:58,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 12:36:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:36:58,975 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:36:58,977 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:36:58,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:36:58,994 INFO L124 PetriNetUnfolderBase]: 23/167 cut-off events. [2023-08-24 12:36:58,994 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:36:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 23/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:36:58,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 123 transitions, 254 flow [2023-08-24 12:36:58,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:58,996 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:36:58,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:58,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 118 transitions, 241 flow [2023-08-24 12:36:59,008 INFO L124 PetriNetUnfolderBase]: 22/162 cut-off events. [2023-08-24 12:36:59,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:36:59,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 162 events. 22/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 358 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 83. Up to 6 conditions per place. [2023-08-24 12:36:59,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 2800 [2023-08-24 12:37:01,804 INFO L134 LiptonReduction]: Checked pairs total: 4433 [2023-08-24 12:37:01,804 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-24 12:37:01,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:01,806 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:01,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:01,813 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:01,813 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-08-24 12:37:01,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:01,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:01,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:37:01,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:01,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1913463, now seen corresponding path program 1 times [2023-08-24 12:37:01,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:01,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789433359] [2023-08-24 12:37:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:01,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:01,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:01,874 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:01,874 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:01,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:37:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:37:01,875 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:01,875 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:37:01,876 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:01,876 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:37:01,897 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:37:01,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:01,921 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:01,921 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:01,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:01,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:01,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:01,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:01,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:01,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:01,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:01,944 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:01,945 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:01,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:01,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-24 12:37:04,854 INFO L134 LiptonReduction]: Checked pairs total: 17490 [2023-08-24 12:37:04,855 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-24 12:37:04,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:04,857 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:04,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:04,859 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:04,859 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-24 12:37:04,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:04,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:04,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:04,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:04,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash 27236629, now seen corresponding path program 1 times [2023-08-24 12:37:04,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997142248] [2023-08-24 12:37:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:04,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:04,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997142248] [2023-08-24 12:37:04,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997142248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:04,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:04,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965939438] [2023-08-24 12:37:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:04,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-24 12:37:04,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2023-08-24 12:37:04,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:04,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-24 12:37:04,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:05,166 INFO L124 PetriNetUnfolderBase]: 1446/2604 cut-off events. [2023-08-24 12:37:05,166 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-24 12:37:05,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4992 conditions, 2604 events. 1446/2604 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15544 event pairs, 1124 based on Foata normal form. 289/2567 useless extension candidates. Maximal degree in co-relation 2561. Up to 2327 conditions per place. [2023-08-24 12:37:05,176 INFO L140 encePairwiseOnDemand]: 255/273 looper letters, 28 selfloop transitions, 2 changer transitions 12/51 dead transitions. [2023-08-24 12:37:05,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2023-08-24 12:37:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-24 12:37:05,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262515262515263 [2023-08-24 12:37:05,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-24 12:37:05,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-24 12:37:05,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:05,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-24 12:37:05,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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) [2023-08-24 12:37:05,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-24 12:37:05,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-24 12:37:05,181 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 431 transitions. [2023-08-24 12:37:05,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2023-08-24 12:37:05,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:05,185 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-24 12:37:05,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=104, 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=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-24 12:37:05,187 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-24 12:37:05,188 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-24 12:37:05,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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) [2023-08-24 12:37:05,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:05,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:05,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 12:37:05,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:05,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1854168215, now seen corresponding path program 1 times [2023-08-24 12:37:05,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:05,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652213392] [2023-08-24 12:37:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:37:05,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:05,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652213392] [2023-08-24 12:37:05,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652213392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:05,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:05,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:37:05,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996319852] [2023-08-24 12:37:05,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:05,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:05,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:05,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:05,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 273 [2023-08-24 12:37:05,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-08-24 12:37:05,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:05,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 273 [2023-08-24 12:37:05,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:05,477 INFO L124 PetriNetUnfolderBase]: 1117/1876 cut-off events. [2023-08-24 12:37:05,478 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2023-08-24 12:37:05,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4000 conditions, 1876 events. 1117/1876 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9069 event pairs, 438 based on Foata normal form. 16/1885 useless extension candidates. Maximal degree in co-relation 3919. Up to 1659 conditions per place. [2023-08-24 12:37:05,486 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 38 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2023-08-24 12:37:05,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 202 flow [2023-08-24 12:37:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-24 12:37:05,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-08-24 12:37:05,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-24 12:37:05,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-24 12:37:05,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:05,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-24 12:37:05,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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) [2023-08-24 12:37:05,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-24 12:37:05,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-24 12:37:05,492 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 3 states and 403 transitions. [2023-08-24 12:37:05,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 202 flow [2023-08-24 12:37:05,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:05,494 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 99 flow [2023-08-24 12:37:05,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-24 12:37:05,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2023-08-24 12:37:05,496 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 99 flow [2023-08-24 12:37:05,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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) [2023-08-24 12:37:05,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:05,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:05,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:37:05,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:05,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash -564066318, now seen corresponding path program 1 times [2023-08-24 12:37:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:05,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811425097] [2023-08-24 12:37:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:05,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811425097] [2023-08-24 12:37:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811425097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817671776] [2023-08-24 12:37:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:05,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:05,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:05,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:05,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:37:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:05,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:05,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:05,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:05,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817671776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:05,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:05,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79995491] [2023-08-24 12:37:05,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:05,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:05,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:05,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-24 12:37:05,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 125.85714285714286) internal successors, (881), 7 states have internal predecessors, (881), 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) [2023-08-24 12:37:05,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:05,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-24 12:37:05,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:05,786 INFO L124 PetriNetUnfolderBase]: 301/582 cut-off events. [2023-08-24 12:37:05,786 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2023-08-24 12:37:05,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 582 events. 301/582 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2684 event pairs, 55 based on Foata normal form. 76/657 useless extension candidates. Maximal degree in co-relation 803. Up to 370 conditions per place. [2023-08-24 12:37:05,788 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-24 12:37:05,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 228 flow [2023-08-24 12:37:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:37:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:37:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 659 transitions. [2023-08-24 12:37:05,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827838827838828 [2023-08-24 12:37:05,791 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 659 transitions. [2023-08-24 12:37:05,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 659 transitions. [2023-08-24 12:37:05,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:05,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 659 transitions. [2023-08-24 12:37:05,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 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) [2023-08-24 12:37:05,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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) [2023-08-24 12:37:05,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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) [2023-08-24 12:37:05,795 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 99 flow. Second operand 5 states and 659 transitions. [2023-08-24 12:37:05,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 228 flow [2023-08-24 12:37:05,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:05,798 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2023-08-24 12:37:05,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2023-08-24 12:37:05,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2023-08-24 12:37:05,799 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2023-08-24 12:37:05,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.85714285714286) internal successors, (881), 7 states have internal predecessors, (881), 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) [2023-08-24 12:37:05,800 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:37:05,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-24 12:37:06,006 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:37:06,006 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:37:06,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:06,030 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:06,030 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:06,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:06,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:06,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:06,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:06,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:06,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:06,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 153 transitions, 324 flow [2023-08-24 12:37:06,051 INFO L124 PetriNetUnfolderBase]: 40/266 cut-off events. [2023-08-24 12:37:06,051 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:37:06,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 266 events. 40/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 739 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 169. Up to 9 conditions per place. [2023-08-24 12:37:06,057 INFO L119 LiptonReduction]: Number of co-enabled transitions 7784 [2023-08-24 12:37:08,762 INFO L134 LiptonReduction]: Checked pairs total: 17474 [2023-08-24 12:37:08,762 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-24 12:37:08,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:08,764 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:08,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:08,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:08,769 INFO L124 PetriNetUnfolderBase]: 15/62 cut-off events. [2023-08-24 12:37:08,769 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:37:08,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:08,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:37:08,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:08,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash 287437234, now seen corresponding path program 1 times [2023-08-24 12:37:08,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368769684] [2023-08-24 12:37:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:08,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:08,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:08,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:08,795 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:08,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:37:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 12:37:08,796 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:08,796 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:37:08,797 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:08,797 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:37:08,811 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:37:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:08,844 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:08,844 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:08,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:08,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:08,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:08,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:08,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:08,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:08,880 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:08,881 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:08,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:08,894 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-24 12:37:11,780 INFO L134 LiptonReduction]: Checked pairs total: 38263 [2023-08-24 12:37:11,781 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-24 12:37:11,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:11,782 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:11,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:11,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:11,784 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-24 12:37:11,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:11,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:11,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:11,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:11,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash 41644316, now seen corresponding path program 1 times [2023-08-24 12:37:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112918944] [2023-08-24 12:37:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:11,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:11,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112918944] [2023-08-24 12:37:11,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112918944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:11,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:11,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:11,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144637738] [2023-08-24 12:37:11,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:11,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:11,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:11,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:11,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2023-08-24 12:37:11,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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) [2023-08-24 12:37:11,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:11,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2023-08-24 12:37:11,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:13,653 INFO L124 PetriNetUnfolderBase]: 16282/24958 cut-off events. [2023-08-24 12:37:13,653 INFO L125 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2023-08-24 12:37:13,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48518 conditions, 24958 events. 16282/24958 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 179986 event pairs, 13853 based on Foata normal form. 5644/27919 useless extension candidates. Maximal degree in co-relation 9279. Up to 22994 conditions per place. [2023-08-24 12:37:13,769 INFO L140 encePairwiseOnDemand]: 294/318 looper letters, 35 selfloop transitions, 2 changer transitions 13/64 dead transitions. [2023-08-24 12:37:13,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 254 flow [2023-08-24 12:37:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-24 12:37:13,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356394129979035 [2023-08-24 12:37:13,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-24 12:37:13,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-24 12:37:13,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:13,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-24 12:37:13,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 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) [2023-08-24 12:37:13,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2023-08-24 12:37:13,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2023-08-24 12:37:13,778 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 511 transitions. [2023-08-24 12:37:13,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 254 flow [2023-08-24 12:37:13,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:13,782 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 113 flow [2023-08-24 12:37:13,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=142, 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=113, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-24 12:37:13,783 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-24 12:37:13,783 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 113 flow [2023-08-24 12:37:13,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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) [2023-08-24 12:37:13,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:13,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:13,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:37:13,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:13,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 173992110, now seen corresponding path program 1 times [2023-08-24 12:37:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:13,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480327879] [2023-08-24 12:37:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:37:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480327879] [2023-08-24 12:37:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480327879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:13,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:13,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:37:13,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959685891] [2023-08-24 12:37:13,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:13,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:13,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:13,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 318 [2023-08-24 12:37:13,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 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) [2023-08-24 12:37:13,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:13,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 318 [2023-08-24 12:37:13,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:15,229 INFO L124 PetriNetUnfolderBase]: 14619/21473 cut-off events. [2023-08-24 12:37:15,230 INFO L125 PetriNetUnfolderBase]: For 2623/2623 co-relation queries the response was YES. [2023-08-24 12:37:15,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44572 conditions, 21473 events. 14619/21473 cut-off events. For 2623/2623 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 131970 event pairs, 6373 based on Foata normal form. 52/21462 useless extension candidates. Maximal degree in co-relation 44495. Up to 19928 conditions per place. [2023-08-24 12:37:15,365 INFO L140 encePairwiseOnDemand]: 313/318 looper letters, 49 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-24 12:37:15,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 272 flow [2023-08-24 12:37:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-24 12:37:15,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4916142557651992 [2023-08-24 12:37:15,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-24 12:37:15,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-24 12:37:15,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:15,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-24 12:37:15,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-24 12:37:15,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2023-08-24 12:37:15,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 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) [2023-08-24 12:37:15,371 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 113 flow. Second operand 3 states and 469 transitions. [2023-08-24 12:37:15,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 272 flow [2023-08-24 12:37:15,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 265 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:15,376 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 135 flow [2023-08-24 12:37:15,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-08-24 12:37:15,378 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-08-24 12:37:15,378 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 135 flow [2023-08-24 12:37:15,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 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) [2023-08-24 12:37:15,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:15,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:15,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:37:15,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:15,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -432177815, now seen corresponding path program 1 times [2023-08-24 12:37:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:15,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203266329] [2023-08-24 12:37:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:15,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:15,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203266329] [2023-08-24 12:37:15,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203266329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:37:15,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614750426] [2023-08-24 12:37:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:15,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:15,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:37:15,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:37:15,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 12:37:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:15,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:37:15,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:37:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:15,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:37:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614750426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:37:15,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:37:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:37:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917892700] [2023-08-24 12:37:15,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:37:15,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:37:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:37:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:37:15,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 318 [2023-08-24 12:37:15,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 135 flow. Second operand has 7 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 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) [2023-08-24 12:37:15,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:15,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 318 [2023-08-24 12:37:15,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:16,255 INFO L124 PetriNetUnfolderBase]: 3846/6129 cut-off events. [2023-08-24 12:37:16,255 INFO L125 PetriNetUnfolderBase]: For 910/910 co-relation queries the response was YES. [2023-08-24 12:37:16,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12932 conditions, 6129 events. 3846/6129 cut-off events. For 910/910 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 38275 event pairs, 88 based on Foata normal form. 619/6731 useless extension candidates. Maximal degree in co-relation 8254. Up to 3794 conditions per place. [2023-08-24 12:37:16,279 INFO L140 encePairwiseOnDemand]: 315/318 looper letters, 0 selfloop transitions, 0 changer transitions 90/90 dead transitions. [2023-08-24 12:37:16,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 377 flow [2023-08-24 12:37:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:37:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:37:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 944 transitions. [2023-08-24 12:37:16,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947589098532495 [2023-08-24 12:37:16,283 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 944 transitions. [2023-08-24 12:37:16,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 944 transitions. [2023-08-24 12:37:16,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:16,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 944 transitions. [2023-08-24 12:37:16,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.33333333333334) internal successors, (944), 6 states have internal predecessors, (944), 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) [2023-08-24 12:37:16,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 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) [2023-08-24 12:37:16,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 318.0) internal successors, (2226), 7 states have internal predecessors, (2226), 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) [2023-08-24 12:37:16,290 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 135 flow. Second operand 6 states and 944 transitions. [2023-08-24 12:37:16,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 377 flow [2023-08-24 12:37:16,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:37:16,292 INFO L231 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2023-08-24 12:37:16,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2023-08-24 12:37:16,293 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2023-08-24 12:37:16,293 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2023-08-24 12:37:16,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 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) [2023-08-24 12:37:16,293 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:37:16,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 12:37:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:37:16,499 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:37:16,499 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:37:16,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:16,542 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:16,542 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:16,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:16,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:16,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:16,548 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:16,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:16,549 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:16,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 183 transitions, 396 flow [2023-08-24 12:37:16,583 INFO L124 PetriNetUnfolderBase]: 62/398 cut-off events. [2023-08-24 12:37:16,583 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:37:16,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 398 events. 62/398 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1273 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-24 12:37:16,596 INFO L119 LiptonReduction]: Number of co-enabled transitions 14280 [2023-08-24 12:37:19,301 INFO L134 LiptonReduction]: Checked pairs total: 35317 [2023-08-24 12:37:19,302 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-24 12:37:19,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:37:19,303 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:19,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:19,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:19,311 INFO L124 PetriNetUnfolderBase]: 26/103 cut-off events. [2023-08-24 12:37:19,311 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:37:19,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:19,311 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:37:19,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:37:19,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1024241280, now seen corresponding path program 1 times [2023-08-24 12:37:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:19,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987208539] [2023-08-24 12:37:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:19,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:37:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:37:19,355 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:37:19,355 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:37:19,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:37:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 12:37:19,356 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:37:19,357 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:37:19,358 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:37:19,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:37:19,377 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:37:19,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:19,432 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:37:19,433 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:37:19,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:37:19,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:19,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:19,442 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:37:19,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:19,443 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:19,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:37:19,495 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:37:19,495 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:37:19,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:37:19,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-24 12:37:22,346 INFO L134 LiptonReduction]: Checked pairs total: 59532 [2023-08-24 12:37:22,346 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-24 12:37:22,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:37:22,348 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:37:22,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:37:22,349 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:37:22,350 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 12:37:22,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:37:22,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:22,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:37:22,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:22,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash 57713040, now seen corresponding path program 1 times [2023-08-24 12:37:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:22,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398868589] [2023-08-24 12:37:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:37:22,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:22,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398868589] [2023-08-24 12:37:22,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398868589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:22,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:22,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:37:22,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918310304] [2023-08-24 12:37:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:22,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:22,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:22,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:22,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-24 12:37:22,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2023-08-24 12:37:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-24 12:37:22,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:37:51,442 INFO L124 PetriNetUnfolderBase]: 321014/444511 cut-off events. [2023-08-24 12:37:51,442 INFO L125 PetriNetUnfolderBase]: For 14614/14614 co-relation queries the response was YES. [2023-08-24 12:37:52,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869590 conditions, 444511 events. 321014/444511 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 9874. Compared 3516530 event pairs, 303176 based on Foata normal form. 78598/483385 useless extension candidates. Maximal degree in co-relation 75977. Up to 416874 conditions per place. [2023-08-24 12:37:53,479 INFO L140 encePairwiseOnDemand]: 329/360 looper letters, 49 selfloop transitions, 2 changer transitions 15/80 dead transitions. [2023-08-24 12:37:53,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 332 flow [2023-08-24 12:37:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:37:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:37:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-08-24 12:37:53,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-24 12:37:53,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-08-24 12:37:53,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-08-24 12:37:53,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:37:53,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-08-24 12:37:53,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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) [2023-08-24 12:37:53,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 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) [2023-08-24 12:37:53,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 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) [2023-08-24 12:37:53,485 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 238 flow. Second operand 3 states and 600 transitions. [2023-08-24 12:37:53,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 332 flow [2023-08-24 12:37:53,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:37:53,492 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 146 flow [2023-08-24 12:37:53,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2023-08-24 12:37:53,493 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-24 12:37:53,493 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 146 flow [2023-08-24 12:37:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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) [2023-08-24 12:37:53,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:37:53,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:37:53,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 12:37:53,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:37:53,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:37:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash 926498948, now seen corresponding path program 1 times [2023-08-24 12:37:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:37:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457514179] [2023-08-24 12:37:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:37:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:37:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:37:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:37:53,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:37:53,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457514179] [2023-08-24 12:37:53,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457514179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:37:53,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:37:53,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 12:37:53,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473781340] [2023-08-24 12:37:53,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:37:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:37:53,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:37:53,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:37:53,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:37:53,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 360 [2023-08-24 12:37:53,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2023-08-24 12:37:53,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:37:53,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 360 [2023-08-24 12:37:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:38:11,026 INFO L124 PetriNetUnfolderBase]: 241132/313437 cut-off events. [2023-08-24 12:38:11,026 INFO L125 PetriNetUnfolderBase]: For 34338/34338 co-relation queries the response was YES. [2023-08-24 12:38:11,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655568 conditions, 313437 events. 241132/313437 cut-off events. For 34338/34338 co-relation queries the response was YES. Maximal size of possible extension queue 6424. Compared 2027378 event pairs, 118333 based on Foata normal form. 192/313566 useless extension candidates. Maximal degree in co-relation 655495. Up to 309513 conditions per place. [2023-08-24 12:38:12,580 INFO L140 encePairwiseOnDemand]: 354/360 looper letters, 65 selfloop transitions, 5 changer transitions 0/78 dead transitions. [2023-08-24 12:38:12,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 358 flow [2023-08-24 12:38:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:38:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:38:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-24 12:38:12,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-24 12:38:12,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-24 12:38:12,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-24 12:38:12,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:38:12,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-24 12:38:12,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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) [2023-08-24 12:38:12,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 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) [2023-08-24 12:38:12,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 360.0) internal successors, (1440), 4 states have internal predecessors, (1440), 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) [2023-08-24 12:38:12,585 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 146 flow. Second operand 3 states and 540 transitions. [2023-08-24 12:38:12,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 358 flow [2023-08-24 12:38:12,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 343 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 12:38:12,596 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 171 flow [2023-08-24 12:38:12,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2023-08-24 12:38:12,597 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2023-08-24 12:38:12,597 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 171 flow [2023-08-24 12:38:12,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2023-08-24 12:38:12,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:12,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:38:12,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 12:38:12,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:38:12,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1345548707, now seen corresponding path program 1 times [2023-08-24 12:38:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:12,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31905838] [2023-08-24 12:38:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:12,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:38:12,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31905838] [2023-08-24 12:38:12,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31905838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:38:12,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392945712] [2023-08-24 12:38:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:12,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:38:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:38:12,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:38:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 12:38:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:12,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:38:12,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:38:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:12,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:38:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392945712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:38:12,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:38:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:38:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066610510] [2023-08-24 12:38:12,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:38:12,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:38:12,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:38:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:38:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:38:12,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-24 12:38:12,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 170.0) internal successors, (1190), 7 states have internal predecessors, (1190), 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) [2023-08-24 12:38:12,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:38:12,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-24 12:38:12,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:38:22,446 INFO L124 PetriNetUnfolderBase]: 123388/165325 cut-off events. [2023-08-24 12:38:22,447 INFO L125 PetriNetUnfolderBase]: For 21078/21084 co-relation queries the response was YES. [2023-08-24 12:38:22,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363524 conditions, 165325 events. 123388/165325 cut-off events. For 21078/21084 co-relation queries the response was YES. Maximal size of possible extension queue 4119. Compared 1143878 event pairs, 5736 based on Foata normal form. 738/166047 useless extension candidates. Maximal degree in co-relation 237050. Up to 105544 conditions per place. [2023-08-24 12:38:23,325 INFO L140 encePairwiseOnDemand]: 356/360 looper letters, 133 selfloop transitions, 5 changer transitions 1/153 dead transitions. [2023-08-24 12:38:23,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 153 transitions, 687 flow [2023-08-24 12:38:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:38:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:38:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1131 transitions. [2023-08-24 12:38:23,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236111111111111 [2023-08-24 12:38:23,329 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1131 transitions. [2023-08-24 12:38:23,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1131 transitions. [2023-08-24 12:38:23,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:38:23,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1131 transitions. [2023-08-24 12:38:23,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.5) internal successors, (1131), 6 states have internal predecessors, (1131), 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) [2023-08-24 12:38:23,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 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) [2023-08-24 12:38:23,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 360.0) internal successors, (2520), 7 states have internal predecessors, (2520), 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) [2023-08-24 12:38:23,336 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 171 flow. Second operand 6 states and 1131 transitions. [2023-08-24 12:38:23,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 153 transitions, 687 flow [2023-08-24 12:38:23,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 153 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:38:23,339 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 200 flow [2023-08-24 12:38:23,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-08-24 12:38:23,340 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-24 12:38:23,340 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 200 flow [2023-08-24 12:38:23,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 170.0) internal successors, (1190), 7 states have internal predecessors, (1190), 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) [2023-08-24 12:38:23,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:23,341 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:38:23,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 12:38:23,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 12:38:23,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:38:23,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash 503325795, now seen corresponding path program 1 times [2023-08-24 12:38:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:23,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672393661] [2023-08-24 12:38:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:23,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:38:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672393661] [2023-08-24 12:38:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672393661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:38:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815143044] [2023-08-24 12:38:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:38:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:38:23,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:38:23,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 12:38:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:23,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:38:23,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:38:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:23,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:38:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:23,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815143044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:38:23,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:38:23,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 12:38:23,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127795476] [2023-08-24 12:38:23,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:38:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 12:38:23,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:38:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 12:38:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 12:38:23,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 360 [2023-08-24 12:38:23,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 200 flow. Second operand has 13 states, 13 states have (on average 170.30769230769232) internal successors, (2214), 13 states have internal predecessors, (2214), 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) [2023-08-24 12:38:23,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:38:23,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 360 [2023-08-24 12:38:23,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:38:27,495 INFO L124 PetriNetUnfolderBase]: 41092/57672 cut-off events. [2023-08-24 12:38:27,496 INFO L125 PetriNetUnfolderBase]: For 52179/52179 co-relation queries the response was YES. [2023-08-24 12:38:27,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141394 conditions, 57672 events. 41092/57672 cut-off events. For 52179/52179 co-relation queries the response was YES. Maximal size of possible extension queue 1546. Compared 384381 event pairs, 1684 based on Foata normal form. 5832/63502 useless extension candidates. Maximal degree in co-relation 109480. Up to 26487 conditions per place. [2023-08-24 12:38:27,699 INFO L140 encePairwiseOnDemand]: 357/360 looper letters, 0 selfloop transitions, 0 changer transitions 149/149 dead transitions. [2023-08-24 12:38:27,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 149 transitions, 678 flow [2023-08-24 12:38:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:38:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:38:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1292 transitions. [2023-08-24 12:38:27,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126984126984127 [2023-08-24 12:38:27,704 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1292 transitions. [2023-08-24 12:38:27,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1292 transitions. [2023-08-24 12:38:27,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:38:27,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1292 transitions. [2023-08-24 12:38:27,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 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) [2023-08-24 12:38:27,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 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) [2023-08-24 12:38:27,711 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 360.0) internal successors, (2880), 8 states have internal predecessors, (2880), 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) [2023-08-24 12:38:27,711 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 200 flow. Second operand 7 states and 1292 transitions. [2023-08-24 12:38:27,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 149 transitions, 678 flow [2023-08-24 12:38:27,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 149 transitions, 659 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 12:38:27,782 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-24 12:38:27,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=360, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-24 12:38:27,782 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-08-24 12:38:27,783 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-24 12:38:27,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.30769230769232) internal successors, (2214), 13 states have internal predecessors, (2214), 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) [2023-08-24 12:38:27,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:38:27,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 12:38:27,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 12:38:27,984 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-24 12:38:27,985 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:38:27,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:28,025 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:38:28,026 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:38:28,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:38:28,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:28,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:28,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:38:28,032 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:28,032 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:28,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 213 transitions, 470 flow [2023-08-24 12:38:28,072 INFO L124 PetriNetUnfolderBase]: 96/598 cut-off events. [2023-08-24 12:38:28,072 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:38:28,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 598 events. 96/598 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2202 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 418. Up to 32 conditions per place. [2023-08-24 12:38:28,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 22512 [2023-08-24 12:38:31,314 INFO L134 LiptonReduction]: Checked pairs total: 66098 [2023-08-24 12:38:31,314 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-08-24 12:38:31,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:38:31,316 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:38:31,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:38:31,324 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:38:31,325 INFO L124 PetriNetUnfolderBase]: 40/151 cut-off events. [2023-08-24 12:38:31,325 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 12:38:31,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:31,325 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:38:31,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:38:31,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 771928196, now seen corresponding path program 1 times [2023-08-24 12:38:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805435225] [2023-08-24 12:38:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:38:31,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:38:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:38:31,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:38:31,349 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:38:31,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:38:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 12:38:31,350 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:38:31,350 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:38:31,350 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:38:31,350 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:38:31,380 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:38:31,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:31,474 INFO L124 PetriNetUnfolderBase]: 158/938 cut-off events. [2023-08-24 12:38:31,475 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:38:31,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 938 events. 158/938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4103 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 643. Up to 80 conditions per place. [2023-08-24 12:38:31,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:31,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:31,489 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:38:31,489 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:31,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:31,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 243 transitions, 546 flow [2023-08-24 12:38:31,557 INFO L124 PetriNetUnfolderBase]: 158/938 cut-off events. [2023-08-24 12:38:31,558 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:38:31,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049 conditions, 938 events. 158/938 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4103 event pairs, 23 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 643. Up to 80 conditions per place. [2023-08-24 12:38:31,593 INFO L119 LiptonReduction]: Number of co-enabled transitions 32480 [2023-08-24 12:38:34,538 INFO L134 LiptonReduction]: Checked pairs total: 90937 [2023-08-24 12:38:34,539 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-24 12:38:34,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:38:34,540 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=LoopsAndPotentialCycles, 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;@21f2c27, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:38:34,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:38:34,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:38:34,542 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-24 12:38:34,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:38:34,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:38:34,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:38:34,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:38:34,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:38:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash 75630383, now seen corresponding path program 1 times [2023-08-24 12:38:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:38:34,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076981436] [2023-08-24 12:38:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:38:34,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:38:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:38:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:38:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:38:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076981436] [2023-08-24 12:38:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076981436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:38:34,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:38:34,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:38:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918325338] [2023-08-24 12:38:34,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:38:34,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:38:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:38:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:38:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:38:34,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 405 [2023-08-24 12:38:34,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) [2023-08-24 12:38:34,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:38:34,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 405 [2023-08-24 12:38:34,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand