/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-lit/sssc12.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:20:05,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:20:05,619 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:20:05,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:20:05,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:20:05,656 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:20:05,656 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:20:05,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:20:05,657 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:20:05,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:20:05,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:20:05,662 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:20:05,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:20:05,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:20:05,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:20:05,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:20:05,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:20:05,664 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:20:05,664 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:20:05,664 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:20:05,665 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:20:05,665 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:20:05,666 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:20:05,666 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:20:05,666 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:20:05,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:20:05,666 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:20:05,667 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:20:05,667 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:20:05,667 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:20:05,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:20:05,668 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:20:05,669 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:20:05,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:20:05,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:20:05,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:20:05,941 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:20:05,942 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:20:05,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/sssc12.i [2023-11-17 15:20:07,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:20:07,418 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:20:07,420 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12.i [2023-11-17 15:20:07,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7975c62/b32f602082704b86b42415d5bed43097/FLAG18273947c [2023-11-17 15:20:07,468 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce7975c62/b32f602082704b86b42415d5bed43097 [2023-11-17 15:20:07,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:20:07,471 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:20:07,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:20:07,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:20:07,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:20:07,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:20:07" (1/1) ... [2023-11-17 15:20:07,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8d2885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:07, skipping insertion in model container [2023-11-17 15:20:07,478 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:20:07" (1/1) ... [2023-11-17 15:20:07,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:20:07,950 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12.i[46865,46878] [2023-11-17 15:20:07,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:20:07,985 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:20:08,038 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12.i[46865,46878] [2023-11-17 15:20:08,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:20:08,102 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:20:08,102 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:20:08,110 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:20:08,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08 WrapperNode [2023-11-17 15:20:08,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:20:08,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:20:08,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:20:08,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:20:08,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,159 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2023-11-17 15:20:08,160 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:20:08,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:20:08,161 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:20:08,161 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:20:08,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,203 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,204 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:20:08,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:20:08,209 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:20:08,209 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:20:08,210 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:20:08,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:20:08,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:20:08,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:20:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:20:08,272 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-17 15:20:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-17 15:20:08,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:20:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:20:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:20:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:20:08,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 15:20:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:20:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:20:08,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:20:08,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:20:08,276 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:20:08,397 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:20:08,399 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:20:08,588 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:20:08,636 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:20:08,636 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:20:08,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:20:08 BoogieIcfgContainer [2023-11-17 15:20:08,638 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:20:08,640 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:20:08,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:20:08,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:20:08,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:20:07" (1/3) ... [2023-11-17 15:20:08,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba3fa0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:20:08, skipping insertion in model container [2023-11-17 15:20:08,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08" (2/3) ... [2023-11-17 15:20:08,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba3fa0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:20:08, skipping insertion in model container [2023-11-17 15:20:08,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:20:08" (3/3) ... [2023-11-17 15:20:08,650 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2023-11-17 15:20:08,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:20:08,667 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:20:08,667 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:20:08,718 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:08,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 160 flow [2023-11-17 15:20:08,783 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2023-11-17 15:20:08,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:08,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-11-17 15:20:08,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 160 flow [2023-11-17 15:20:08,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 160 flow [2023-11-17 15:20:08,796 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:08,806 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 160 flow [2023-11-17 15:20:08,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 78 transitions, 160 flow [2023-11-17 15:20:08,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 160 flow [2023-11-17 15:20:08,829 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2023-11-17 15:20:08,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:08,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-11-17 15:20:08,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 960 [2023-11-17 15:20:11,293 INFO L134 LiptonReduction]: Checked pairs total: 861 [2023-11-17 15:20:11,293 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-17 15:20:11,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:11,328 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33304070, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:11,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:20:11,332 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:11,332 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-17 15:20:11,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:11,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:11,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:20:11,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:20:11,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash 359781681, now seen corresponding path program 1 times [2023-11-17 15:20:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:11,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448337953] [2023-11-17 15:20:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:11,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:11,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448337953] [2023-11-17 15:20:11,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448337953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:11,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:11,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705113783] [2023-11-17 15:20:11,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:11,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:20:11,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:11,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:20:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:20:11,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 164 [2023-11-17 15:20:11,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:11,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:11,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 164 [2023-11-17 15:20:11,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:11,889 INFO L124 PetriNetUnfolderBase]: 13/34 cut-off events. [2023-11-17 15:20:11,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:11,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 60. Up to 19 conditions per place. [2023-11-17 15:20:11,892 INFO L140 encePairwiseOnDemand]: 159/164 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2023-11-17 15:20:11,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 15 transitions, 62 flow [2023-11-17 15:20:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:20:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:20:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 222 transitions. [2023-11-17 15:20:11,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2023-11-17 15:20:11,911 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 222 transitions. [2023-11-17 15:20:11,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 222 transitions. [2023-11-17 15:20:11,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:11,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 222 transitions. [2023-11-17 15:20:11,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:11,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:11,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:11,925 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 4 states and 222 transitions. [2023-11-17 15:20:11,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 15 transitions, 62 flow [2023-11-17 15:20:11,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:11,929 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 36 flow [2023-11-17 15:20:11,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=36, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2023-11-17 15:20:11,934 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2023-11-17 15:20:11,934 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 36 flow [2023-11-17 15:20:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:11,935 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:20:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:20:11,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:20:11,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1731730430, now seen corresponding path program 1 times [2023-11-17 15:20:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761596657] [2023-11-17 15:20:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:11,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:11,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:11,980 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:11,982 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:20:11,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:20:11,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:20:11,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:20:11,984 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:20:11,987 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:11,987 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:20:12,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:12,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 111 transitions, 232 flow [2023-11-17 15:20:12,059 INFO L124 PetriNetUnfolderBase]: 12/137 cut-off events. [2023-11-17 15:20:12,060 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:20:12,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 12/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-11-17 15:20:12,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 111 transitions, 232 flow [2023-11-17 15:20:12,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 111 transitions, 232 flow [2023-11-17 15:20:12,062 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:12,063 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 111 transitions, 232 flow [2023-11-17 15:20:12,063 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 111 transitions, 232 flow [2023-11-17 15:20:12,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 111 transitions, 232 flow [2023-11-17 15:20:12,080 INFO L124 PetriNetUnfolderBase]: 12/137 cut-off events. [2023-11-17 15:20:12,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:20:12,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 12/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-11-17 15:20:12,088 INFO L119 LiptonReduction]: Number of co-enabled transitions 4032 [2023-11-17 15:20:14,547 INFO L134 LiptonReduction]: Checked pairs total: 7565 [2023-11-17 15:20:14,548 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-17 15:20:14,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:14,551 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33304070, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:14,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:20:14,555 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:14,555 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 15:20:14,555 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:14,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:14,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:14,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:20:14,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 478073983, now seen corresponding path program 1 times [2023-11-17 15:20:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:14,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961173857] [2023-11-17 15:20:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:14,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:14,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:14,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961173857] [2023-11-17 15:20:14,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961173857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:14,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:14,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:14,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723189361] [2023-11-17 15:20:14,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:14,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:14,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:14,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 222 [2023-11-17 15:20:14,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:14,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 222 [2023-11-17 15:20:14,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:14,737 INFO L124 PetriNetUnfolderBase]: 301/519 cut-off events. [2023-11-17 15:20:14,737 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-17 15:20:14,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 519 events. 301/519 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2584 event pairs, 132 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 458. Up to 291 conditions per place. [2023-11-17 15:20:14,742 INFO L140 encePairwiseOnDemand]: 217/222 looper letters, 32 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-17 15:20:14,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 39 transitions, 161 flow [2023-11-17 15:20:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-17 15:20:14,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43543543543543545 [2023-11-17 15:20:14,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-17 15:20:14,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-17 15:20:14,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:14,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-17 15:20:14,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,750 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 68 flow. Second operand 3 states and 290 transitions. [2023-11-17 15:20:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 39 transitions, 161 flow [2023-11-17 15:20:14,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:14,752 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-11-17 15:20:14,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 15:20:14,753 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 15:20:14,753 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-11-17 15:20:14,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:14,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:14,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:20:14,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:20:14,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 75882573, now seen corresponding path program 1 times [2023-11-17 15:20:14,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:14,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796496036] [2023-11-17 15:20:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:14,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796496036] [2023-11-17 15:20:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796496036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:14,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:14,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248828036] [2023-11-17 15:20:14,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:14,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:20:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:20:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:20:14,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 222 [2023-11-17 15:20:14,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:14,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 222 [2023-11-17 15:20:14,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:15,064 INFO L124 PetriNetUnfolderBase]: 627/1042 cut-off events. [2023-11-17 15:20:15,064 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-11-17 15:20:15,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 1042 events. 627/1042 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6018 event pairs, 50 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 2106. Up to 364 conditions per place. [2023-11-17 15:20:15,072 INFO L140 encePairwiseOnDemand]: 215/222 looper letters, 71 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2023-11-17 15:20:15,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 81 transitions, 364 flow [2023-11-17 15:20:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:20:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:20:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 439 transitions. [2023-11-17 15:20:15,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954954954954955 [2023-11-17 15:20:15,075 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 439 transitions. [2023-11-17 15:20:15,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 439 transitions. [2023-11-17 15:20:15,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:15,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 439 transitions. [2023-11-17 15:20:15,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.8) internal successors, (439), 5 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) [2023-11-17 15:20:15,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:15,080 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:15,080 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 5 states and 439 transitions. [2023-11-17 15:20:15,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 81 transitions, 364 flow [2023-11-17 15:20:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 81 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:15,083 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 126 flow [2023-11-17 15:20:15,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-11-17 15:20:15,084 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-17 15:20:15,084 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 126 flow [2023-11-17 15:20:15,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:15,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:15,085 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:20:15,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:20:15,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:20:15,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash -173732413, now seen corresponding path program 1 times [2023-11-17 15:20:15,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:15,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493922076] [2023-11-17 15:20:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:15,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:15,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:15,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:15,111 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:15,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:20:15,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:20:15,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:20:15,111 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:20:15,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:20:15,112 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:20:15,112 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:15,112 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:20:15,143 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:15,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 144 transitions, 306 flow [2023-11-17 15:20:15,177 INFO L124 PetriNetUnfolderBase]: 17/184 cut-off events. [2023-11-17 15:20:15,177 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:20:15,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 17/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-11-17 15:20:15,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 144 transitions, 306 flow [2023-11-17 15:20:15,182 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 144 transitions, 306 flow [2023-11-17 15:20:15,182 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:15,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 144 transitions, 306 flow [2023-11-17 15:20:15,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 144 transitions, 306 flow [2023-11-17 15:20:15,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 144 transitions, 306 flow [2023-11-17 15:20:15,202 INFO L124 PetriNetUnfolderBase]: 17/184 cut-off events. [2023-11-17 15:20:15,202 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:20:15,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 17/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-11-17 15:20:15,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-11-17 15:20:17,901 INFO L134 LiptonReduction]: Checked pairs total: 18368 [2023-11-17 15:20:17,902 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-17 15:20:17,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:17,919 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33304070, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:17,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:20:17,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:17,923 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 15:20:17,923 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:17,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:17,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:17,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:17,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:17,924 INFO L85 PathProgramCache]: Analyzing trace with hash 539792086, now seen corresponding path program 1 times [2023-11-17 15:20:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:17,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875186758] [2023-11-17 15:20:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:17,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875186758] [2023-11-17 15:20:17,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875186758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:17,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:17,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:17,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939786516] [2023-11-17 15:20:17,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:17,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:17,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:17,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:17,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 291 [2023-11-17 15:20:17,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:17,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:17,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 291 [2023-11-17 15:20:17,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:18,523 INFO L124 PetriNetUnfolderBase]: 4105/5966 cut-off events. [2023-11-17 15:20:18,523 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-11-17 15:20:18,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 5966 events. 4105/5966 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34272 event pairs, 1819 based on Foata normal form. 0/4312 useless extension candidates. Maximal degree in co-relation 2102. Up to 3294 conditions per place. [2023-11-17 15:20:18,574 INFO L140 encePairwiseOnDemand]: 286/291 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-17 15:20:18,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 260 flow [2023-11-17 15:20:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2023-11-17 15:20:18,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44788087056128295 [2023-11-17 15:20:18,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2023-11-17 15:20:18,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2023-11-17 15:20:18,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:18,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2023-11-17 15:20:18,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:18,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:18,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:18,581 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 100 flow. Second operand 3 states and 391 transitions. [2023-11-17 15:20:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 260 flow [2023-11-17 15:20:18,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 256 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:18,585 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 106 flow [2023-11-17 15:20:18,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-17 15:20:18,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-11-17 15:20:18,589 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 106 flow [2023-11-17 15:20:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:18,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:18,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:20:18,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:18,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 386224727, now seen corresponding path program 1 times [2023-11-17 15:20:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11687811] [2023-11-17 15:20:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11687811] [2023-11-17 15:20:18,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11687811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:18,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:18,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717969698] [2023-11-17 15:20:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:18,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:20:18,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:20:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:20:18,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 291 [2023-11-17 15:20:18,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:18,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:18,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 291 [2023-11-17 15:20:18,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:20,054 INFO L124 PetriNetUnfolderBase]: 12329/17057 cut-off events. [2023-11-17 15:20:20,055 INFO L125 PetriNetUnfolderBase]: For 1770/1770 co-relation queries the response was YES. [2023-11-17 15:20:20,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36499 conditions, 17057 events. 12329/17057 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 1078. Compared 108804 event pairs, 890 based on Foata normal form. 0/13215 useless extension candidates. Maximal degree in co-relation 36310. Up to 6691 conditions per place. [2023-11-17 15:20:20,188 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 115 selfloop transitions, 9 changer transitions 0/127 dead transitions. [2023-11-17 15:20:20,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 127 transitions, 569 flow [2023-11-17 15:20:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:20:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:20:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-11-17 15:20:20,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054982817869416 [2023-11-17 15:20:20,191 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-11-17 15:20:20,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-11-17 15:20:20,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:20,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-11-17 15:20:20,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:20,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:20,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:20,198 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 106 flow. Second operand 5 states and 590 transitions. [2023-11-17 15:20:20,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 127 transitions, 569 flow [2023-11-17 15:20:20,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 127 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:20,205 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 171 flow [2023-11-17 15:20:20,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-17 15:20:20,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2023-11-17 15:20:20,207 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 171 flow [2023-11-17 15:20:20,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 4 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:20,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:20,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:20,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:20:20,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:20,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash 556467184, now seen corresponding path program 1 times [2023-11-17 15:20:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:20,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891920882] [2023-11-17 15:20:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:20,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:20:20,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:20,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891920882] [2023-11-17 15:20:20,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891920882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:20,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:20,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672472567] [2023-11-17 15:20:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:20,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:20,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:20,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 291 [2023-11-17 15:20:20,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:20,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:20,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 291 [2023-11-17 15:20:20,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:21,484 INFO L124 PetriNetUnfolderBase]: 9709/13839 cut-off events. [2023-11-17 15:20:21,484 INFO L125 PetriNetUnfolderBase]: For 5761/5982 co-relation queries the response was YES. [2023-11-17 15:20:21,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31887 conditions, 13839 events. 9709/13839 cut-off events. For 5761/5982 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 89453 event pairs, 4441 based on Foata normal form. 0/10596 useless extension candidates. Maximal degree in co-relation 20318. Up to 8136 conditions per place. [2023-11-17 15:20:21,670 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 65 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-17 15:20:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 402 flow [2023-11-17 15:20:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-17 15:20:21,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44673539518900346 [2023-11-17 15:20:21,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-17 15:20:21,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-17 15:20:21,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:21,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-17 15:20:21,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:21,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:21,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:21,676 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 171 flow. Second operand 3 states and 390 transitions. [2023-11-17 15:20:21,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 402 flow [2023-11-17 15:20:21,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:20:21,682 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 176 flow [2023-11-17 15:20:21,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-17 15:20:21,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-11-17 15:20:21,684 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 176 flow [2023-11-17 15:20:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:21,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:21,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:21,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:20:21,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:21,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -911933917, now seen corresponding path program 1 times [2023-11-17 15:20:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:21,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164588388] [2023-11-17 15:20:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:21,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:21,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164588388] [2023-11-17 15:20:21,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164588388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:20:21,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348084057] [2023-11-17 15:20:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:21,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:20:21,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:20:21,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:20:21,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:20:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:21,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 15:20:21,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:20:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:21,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:20:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:22,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348084057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:20:22,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:20:22,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-17 15:20:22,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260900186] [2023-11-17 15:20:22,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:20:22,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:20:22,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:22,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:20:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:20:22,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 291 [2023-11-17 15:20:22,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:22,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:22,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 291 [2023-11-17 15:20:22,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:25,294 INFO L124 PetriNetUnfolderBase]: 25675/36211 cut-off events. [2023-11-17 15:20:25,295 INFO L125 PetriNetUnfolderBase]: For 13761/13761 co-relation queries the response was YES. [2023-11-17 15:20:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90238 conditions, 36211 events. 25675/36211 cut-off events. For 13761/13761 co-relation queries the response was YES. Maximal size of possible extension queue 2176. Compared 256568 event pairs, 5387 based on Foata normal form. 0/30877 useless extension candidates. Maximal degree in co-relation 67548. Up to 10284 conditions per place. [2023-11-17 15:20:25,550 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 284 selfloop transitions, 48 changer transitions 0/335 dead transitions. [2023-11-17 15:20:25,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 335 transitions, 1782 flow [2023-11-17 15:20:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:20:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:20:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1547 transitions. [2023-11-17 15:20:25,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40893470790378006 [2023-11-17 15:20:25,556 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1547 transitions. [2023-11-17 15:20:25,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1547 transitions. [2023-11-17 15:20:25,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:25,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1547 transitions. [2023-11-17 15:20:25,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 119.0) internal successors, (1547), 13 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:25,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:25,567 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:25,567 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 176 flow. Second operand 13 states and 1547 transitions. [2023-11-17 15:20:25,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 335 transitions, 1782 flow [2023-11-17 15:20:25,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 335 transitions, 1734 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:25,661 INFO L231 Difference]: Finished difference. Result has 73 places, 91 transitions, 668 flow [2023-11-17 15:20:25,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=668, PETRI_PLACES=73, PETRI_TRANSITIONS=91} [2023-11-17 15:20:25,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-11-17 15:20:25,662 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 91 transitions, 668 flow [2023-11-17 15:20:25,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:25,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:25,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:25,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:20:25,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:20:25,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:25,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1909574864, now seen corresponding path program 1 times [2023-11-17 15:20:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102327988] [2023-11-17 15:20:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:25,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:20:25,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:25,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102327988] [2023-11-17 15:20:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102327988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:25,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339253234] [2023-11-17 15:20:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:20:25,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:20:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:20:25,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 291 [2023-11-17 15:20:25,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 91 transitions, 668 flow. Second operand has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:25,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:25,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 291 [2023-11-17 15:20:25,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:32,224 INFO L124 PetriNetUnfolderBase]: 51508/72434 cut-off events. [2023-11-17 15:20:32,224 INFO L125 PetriNetUnfolderBase]: For 196018/196018 co-relation queries the response was YES. [2023-11-17 15:20:32,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230326 conditions, 72434 events. 51508/72434 cut-off events. For 196018/196018 co-relation queries the response was YES. Maximal size of possible extension queue 4766. Compared 549819 event pairs, 11584 based on Foata normal form. 0/65454 useless extension candidates. Maximal degree in co-relation 189134. Up to 32461 conditions per place. [2023-11-17 15:20:32,824 INFO L140 encePairwiseOnDemand]: 277/291 looper letters, 267 selfloop transitions, 59 changer transitions 0/329 dead transitions. [2023-11-17 15:20:32,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 329 transitions, 2894 flow [2023-11-17 15:20:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 15:20:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 15:20:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 844 transitions. [2023-11-17 15:20:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41433480608738343 [2023-11-17 15:20:32,828 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 844 transitions. [2023-11-17 15:20:32,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 844 transitions. [2023-11-17 15:20:32,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:32,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 844 transitions. [2023-11-17 15:20:32,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 120.57142857142857) internal successors, (844), 7 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:32,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:32,835 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:32,835 INFO L175 Difference]: Start difference. First operand has 73 places, 91 transitions, 668 flow. Second operand 7 states and 844 transitions. [2023-11-17 15:20:32,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 329 transitions, 2894 flow [2023-11-17 15:20:34,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 329 transitions, 2702 flow, removed 96 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:34,035 INFO L231 Difference]: Finished difference. Result has 84 places, 143 transitions, 1321 flow [2023-11-17 15:20:34,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1321, PETRI_PLACES=84, PETRI_TRANSITIONS=143} [2023-11-17 15:20:34,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2023-11-17 15:20:34,036 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 143 transitions, 1321 flow [2023-11-17 15:20:34,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:34,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:34,036 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:34,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:20:34,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:34,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1753750185, now seen corresponding path program 2 times [2023-11-17 15:20:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:34,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131427690] [2023-11-17 15:20:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:34,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:34,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131427690] [2023-11-17 15:20:34,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131427690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:20:34,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858374053] [2023-11-17 15:20:34,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:20:34,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:20:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:20:34,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:20:34,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:20:34,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:20:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:20:34,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 15:20:34,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:20:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:34,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:20:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:34,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858374053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:20:34,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:20:34,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 15:20:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961929714] [2023-11-17 15:20:34,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:20:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 15:20:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 15:20:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:20:34,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 291 [2023-11-17 15:20:34,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 143 transitions, 1321 flow. Second operand has 14 states, 14 states have (on average 94.71428571428571) internal successors, (1326), 14 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:34,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:34,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 291 [2023-11-17 15:20:34,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:46,684 INFO L124 PetriNetUnfolderBase]: 76324/107266 cut-off events. [2023-11-17 15:20:46,685 INFO L125 PetriNetUnfolderBase]: For 429428/429428 co-relation queries the response was YES. [2023-11-17 15:20:47,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381427 conditions, 107266 events. 76324/107266 cut-off events. For 429428/429428 co-relation queries the response was YES. Maximal size of possible extension queue 5156. Compared 829764 event pairs, 12111 based on Foata normal form. 4956/102652 useless extension candidates. Maximal degree in co-relation 328900. Up to 21804 conditions per place. [2023-11-17 15:20:47,604 INFO L140 encePairwiseOnDemand]: 282/291 looper letters, 698 selfloop transitions, 143 changer transitions 0/844 dead transitions. [2023-11-17 15:20:47,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 844 transitions, 8078 flow [2023-11-17 15:20:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 15:20:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 15:20:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2950 transitions. [2023-11-17 15:20:47,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054982817869416 [2023-11-17 15:20:47,613 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2950 transitions. [2023-11-17 15:20:47,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2950 transitions. [2023-11-17 15:20:47,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:47,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2950 transitions. [2023-11-17 15:20:47,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 118.0) internal successors, (2950), 25 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:47,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 291.0) internal successors, (7566), 26 states have internal predecessors, (7566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:47,631 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 291.0) internal successors, (7566), 26 states have internal predecessors, (7566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:47,631 INFO L175 Difference]: Start difference. First operand has 84 places, 143 transitions, 1321 flow. Second operand 25 states and 2950 transitions. [2023-11-17 15:20:47,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 844 transitions, 8078 flow [2023-11-17 15:20:49,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 844 transitions, 8026 flow, removed 26 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:49,581 INFO L231 Difference]: Finished difference. Result has 108 places, 203 transitions, 2265 flow [2023-11-17 15:20:49,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2265, PETRI_PLACES=108, PETRI_TRANSITIONS=203} [2023-11-17 15:20:49,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2023-11-17 15:20:49,582 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 203 transitions, 2265 flow [2023-11-17 15:20:49,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.71428571428571) internal successors, (1326), 14 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:49,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:49,583 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:20:49,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 15:20:49,783 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,SelfDestructingSolverStorable10 [2023-11-17 15:20:49,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:49,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -539989153, now seen corresponding path program 1 times [2023-11-17 15:20:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162853876] [2023-11-17 15:20:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:49,797 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:49,810 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:49,810 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:49,811 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:20:49,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:20:49,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:20:49,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:20:49,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:20:49,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:20:49,811 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-17 15:20:49,812 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:49,812 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:20:49,835 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:49,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 177 transitions, 382 flow [2023-11-17 15:20:49,854 INFO L124 PetriNetUnfolderBase]: 22/231 cut-off events. [2023-11-17 15:20:49,855 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:20:49,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 231 events. 22/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 628 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-11-17 15:20:49,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 177 transitions, 382 flow [2023-11-17 15:20:49,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 177 transitions, 382 flow [2023-11-17 15:20:49,857 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:49,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 177 transitions, 382 flow [2023-11-17 15:20:49,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 177 transitions, 382 flow [2023-11-17 15:20:49,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 177 transitions, 382 flow [2023-11-17 15:20:49,875 INFO L124 PetriNetUnfolderBase]: 22/231 cut-off events. [2023-11-17 15:20:49,876 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:20:49,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 231 events. 22/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 628 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-11-17 15:20:49,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 16512 [2023-11-17 15:20:52,887 INFO L134 LiptonReduction]: Checked pairs total: 33794 [2023-11-17 15:20:52,887 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-17 15:20:52,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:52,889 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33304070, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:52,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:20:52,891 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:52,891 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-17 15:20:52,891 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:52,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:52,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:52,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:52,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 430597354, now seen corresponding path program 1 times [2023-11-17 15:20:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906951449] [2023-11-17 15:20:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906951449] [2023-11-17 15:20:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906951449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:52,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:52,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112579297] [2023-11-17 15:20:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:52,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:52,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:52,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 351 [2023-11-17 15:20:52,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:52,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:52,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 351 [2023-11-17 15:20:52,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:55,797 INFO L124 PetriNetUnfolderBase]: 41521/56517 cut-off events. [2023-11-17 15:20:55,797 INFO L125 PetriNetUnfolderBase]: For 10132/10132 co-relation queries the response was YES. [2023-11-17 15:20:55,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113276 conditions, 56517 events. 41521/56517 cut-off events. For 10132/10132 co-relation queries the response was YES. Maximal size of possible extension queue 2582. Compared 376247 event pairs, 18351 based on Foata normal form. 0/41564 useless extension candidates. Maximal degree in co-relation 13574. Up to 30622 conditions per place. [2023-11-17 15:20:56,057 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 70 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-17 15:20:56,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 357 flow [2023-11-17 15:20:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-11-17 15:20:56,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46533713200379867 [2023-11-17 15:20:56,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-11-17 15:20:56,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-11-17 15:20:56,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:56,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-11-17 15:20:56,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:56,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:56,062 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:56,063 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 134 flow. Second operand 3 states and 490 transitions. [2023-11-17 15:20:56,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 357 flow [2023-11-17 15:20:56,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 345 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:56,067 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 136 flow [2023-11-17 15:20:56,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-17 15:20:56,068 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 15:20:56,068 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 136 flow [2023-11-17 15:20:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:56,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:56,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:20:56,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:56,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1397386978, now seen corresponding path program 1 times [2023-11-17 15:20:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:56,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467291912] [2023-11-17 15:20:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:56,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:56,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:56,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467291912] [2023-11-17 15:20:56,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467291912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:56,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:56,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706912578] [2023-11-17 15:20:56,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:56,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:20:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:20:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:20:56,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 351 [2023-11-17 15:20:56,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:56,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:56,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 351 [2023-11-17 15:20:56,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:08,863 INFO L124 PetriNetUnfolderBase]: 187657/238305 cut-off events. [2023-11-17 15:21:08,863 INFO L125 PetriNetUnfolderBase]: For 19918/19918 co-relation queries the response was YES. [2023-11-17 15:21:09,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502754 conditions, 238305 events. 187657/238305 cut-off events. For 19918/19918 co-relation queries the response was YES. Maximal size of possible extension queue 10877. Compared 1577960 event pairs, 11990 based on Foata normal form. 0/182580 useless extension candidates. Maximal degree in co-relation 502516. Up to 99421 conditions per place. [2023-11-17 15:21:10,323 INFO L140 encePairwiseOnDemand]: 342/351 looper letters, 159 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2023-11-17 15:21:10,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 173 transitions, 774 flow [2023-11-17 15:21:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:21:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:21:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-11-17 15:21:10,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-11-17 15:21:10,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-11-17 15:21:10,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-11-17 15:21:10,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:10,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-11-17 15:21:10,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:10,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:10,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:10,330 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 136 flow. Second operand 5 states and 741 transitions. [2023-11-17 15:21:10,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 173 transitions, 774 flow [2023-11-17 15:21:10,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 173 transitions, 764 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:21:10,353 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 216 flow [2023-11-17 15:21:10,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-11-17 15:21:10,354 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-11-17 15:21:10,354 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 216 flow [2023-11-17 15:21:10,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:10,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:10,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:10,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:21:10,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:21:10,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash 964475296, now seen corresponding path program 1 times [2023-11-17 15:21:10,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:10,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899885661] [2023-11-17 15:21:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:10,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:21:10,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899885661] [2023-11-17 15:21:10,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899885661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:10,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:10,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:21:10,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692805813] [2023-11-17 15:21:10,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:10,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:10,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:10,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 351 [2023-11-17 15:21:10,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:10,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:10,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 351 [2023-11-17 15:21:10,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:19,795 INFO L124 PetriNetUnfolderBase]: 102079/137168 cut-off events. [2023-11-17 15:21:19,796 INFO L125 PetriNetUnfolderBase]: For 57659/59196 co-relation queries the response was YES. [2023-11-17 15:21:20,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308693 conditions, 137168 events. 102079/137168 cut-off events. For 57659/59196 co-relation queries the response was YES. Maximal size of possible extension queue 6608. Compared 980344 event pairs, 43383 based on Foata normal form. 0/103665 useless extension candidates. Maximal degree in co-relation 184045. Up to 73916 conditions per place. [2023-11-17 15:21:20,881 INFO L140 encePairwiseOnDemand]: 347/351 looper letters, 85 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-11-17 15:21:20,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 98 transitions, 521 flow [2023-11-17 15:21:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-11-17 15:21:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624881291547958 [2023-11-17 15:21:20,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-11-17 15:21:20,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-11-17 15:21:20,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:20,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-11-17 15:21:20,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:20,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:20,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:20,887 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 216 flow. Second operand 3 states and 487 transitions. [2023-11-17 15:21:20,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 98 transitions, 521 flow [2023-11-17 15:21:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 98 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:21:20,927 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 220 flow [2023-11-17 15:21:20,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-11-17 15:21:20,927 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2023-11-17 15:21:20,928 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 220 flow [2023-11-17 15:21:20,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:20,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:20,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 15:21:20,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:21:20,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash -369321184, now seen corresponding path program 1 times [2023-11-17 15:21:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:20,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313985707] [2023-11-17 15:21:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:21:21,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313985707] [2023-11-17 15:21:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313985707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:21:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816095800] [2023-11-17 15:21:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:21,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:21:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:21:21,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:21:21,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:21:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:21,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 15:21:21,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:21:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:21:21,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:21:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:21:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816095800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:21:21,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:21:21,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-11-17 15:21:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208642544] [2023-11-17 15:21:21,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:21:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:21:21,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:21:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 15:21:21,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 351 [2023-11-17 15:21:21,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 220 flow. Second operand has 12 states, 12 states have (on average 116.33333333333333) internal successors, (1396), 12 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:21:21,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:21,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 351 [2023-11-17 15:21:21,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand