/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_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:20:07,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:20:07,388 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 15:20:07,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:20:07,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:20:07,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:20:07,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:20:07,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:20:07,414 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:20:07,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:20:07,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:20:07,417 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:20:07,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:20:07,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:20:07,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:20:07,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:20:07,419 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:20:07,419 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:20:07,419 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:20:07,419 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:20:07,419 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:20:07,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:20:07,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:20:07,420 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:20:07,420 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:20:07,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:20:07,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:20:07,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:20:07,421 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:20:07,421 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:20:07,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:20:07,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:20:07,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:20:07,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:20:07,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:20:07,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:20:07,613 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:20:07,614 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:20:07,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/sssc12_variant.i [2023-11-17 15:20:08,556 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:20:08,751 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:20:08,751 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/sssc12_variant.i [2023-11-17 15:20:08,761 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062751024/b555840f0eaa449b9245f7a2d2350b3c/FLAG3f944ae25 [2023-11-17 15:20:08,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062751024/b555840f0eaa449b9245f7a2d2350b3c [2023-11-17 15:20:08,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:20:08,774 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:20:08,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:20:08,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:20:08,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:20:08,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b428eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:08, skipping insertion in model container [2023-11-17 15:20:08,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:20:08" (1/1) ... [2023-11-17 15:20:08,826 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:20:09,050 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_variant.i[46865,46878] [2023-11-17 15:20:09,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:20:09,071 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:20:09,105 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_variant.i[46865,46878] [2023-11-17 15:20:09,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:20:09,139 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:20:09,139 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:20:09,144 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:20:09,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09 WrapperNode [2023-11-17 15:20:09,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:20:09,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:20:09,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:20:09,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:20:09,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,177 INFO L138 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2023-11-17 15:20:09,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:20:09,178 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:20:09,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:20:09,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:20:09,183 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:20:09,196 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:20:09,196 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:20:09,196 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:20:09,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (1/1) ... [2023-11-17 15:20:09,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:20:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:20:09,224 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 15:20:09,235 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 15:20:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:20:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-17 15:20:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-17 15:20:09,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:20:09,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:20:09,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:20:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:20:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:20:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 15:20:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:20:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:20:09,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:20:09,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:20:09,265 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 15:20:09,390 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:20:09,392 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:20:09,492 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:20:09,516 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:20:09,517 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:20:09,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:20:09 BoogieIcfgContainer [2023-11-17 15:20:09,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:20:09,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:20:09,519 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:20:09,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:20:09,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:20:08" (1/3) ... [2023-11-17 15:20:09,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e670771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:20:09, skipping insertion in model container [2023-11-17 15:20:09,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:20:09" (2/3) ... [2023-11-17 15:20:09,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e670771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:20:09, skipping insertion in model container [2023-11-17 15:20:09,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:20:09" (3/3) ... [2023-11-17 15:20:09,523 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant.i [2023-11-17 15:20:09,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:20:09,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:20:09,541 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:20:09,594 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:09,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 174 flow [2023-11-17 15:20:09,658 INFO L124 PetriNetUnfolderBase]: 7/98 cut-off events. [2023-11-17 15:20:09,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:09,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 98 events. 7/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-11-17 15:20:09,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 85 transitions, 174 flow [2023-11-17 15:20:09,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 85 transitions, 174 flow [2023-11-17 15:20:09,667 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:09,675 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 174 flow [2023-11-17 15:20:09,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 85 transitions, 174 flow [2023-11-17 15:20:09,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 174 flow [2023-11-17 15:20:09,693 INFO L124 PetriNetUnfolderBase]: 7/98 cut-off events. [2023-11-17 15:20:09,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:09,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 98 events. 7/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-11-17 15:20:09,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 1120 [2023-11-17 15:20:11,799 INFO L134 LiptonReduction]: Checked pairs total: 1231 [2023-11-17 15:20:11,799 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-11-17 15:20:11,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:11,831 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;@1c97bda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:11,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:20:11,836 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:11,836 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 15:20:11,837 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:20:11,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:11,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:20:11,837 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:20:11,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1084757747, now seen corresponding path program 1 times [2023-11-17 15:20:11,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:11,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381757603] [2023-11-17 15:20:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:11,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:11,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:11,948 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:11,949 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:11,950 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:20:11,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:20:11,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:20:11,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:20:11,952 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:20:11,954 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:11,954 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:20:11,967 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:11,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 121 transitions, 252 flow [2023-11-17 15:20:12,006 INFO L124 PetriNetUnfolderBase]: 12/149 cut-off events. [2023-11-17 15:20:12,007 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:20:12,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 149 events. 12/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 280 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2023-11-17 15:20:12,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 121 transitions, 252 flow [2023-11-17 15:20:12,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 121 transitions, 252 flow [2023-11-17 15:20:12,011 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:12,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 121 transitions, 252 flow [2023-11-17 15:20:12,012 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 121 transitions, 252 flow [2023-11-17 15:20:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 121 transitions, 252 flow [2023-11-17 15:20:12,026 INFO L124 PetriNetUnfolderBase]: 12/149 cut-off events. [2023-11-17 15:20:12,026 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:20:12,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 149 events. 12/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 280 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2023-11-17 15:20:12,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 4760 [2023-11-17 15:20:14,137 INFO L134 LiptonReduction]: Checked pairs total: 10389 [2023-11-17 15:20:14,137 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-11-17 15:20:14,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:14,140 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;@1c97bda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:14,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:20:14,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:14,142 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-17 15:20:14,143 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:14,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:14,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:14,143 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 15:20:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1547933553, now seen corresponding path program 1 times [2023-11-17 15:20:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830180369] [2023-11-17 15:20:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:14,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:14,267 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 15:20:14,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:14,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830180369] [2023-11-17 15:20:14,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830180369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:14,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:14,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482664284] [2023-11-17 15:20:14,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:14,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:14,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:14,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 235 [2023-11-17 15:20:14,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 15:20:14,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:14,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 235 [2023-11-17 15:20:14,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:14,380 INFO L124 PetriNetUnfolderBase]: 393/685 cut-off events. [2023-11-17 15:20:14,381 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-17 15:20:14,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 685 events. 393/685 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3549 event pairs, 191 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 650. Up to 418 conditions per place. [2023-11-17 15:20:14,385 INFO L140 encePairwiseOnDemand]: 231/235 looper letters, 36 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-17 15:20:14,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 44 transitions, 179 flow [2023-11-17 15:20:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-11-17 15:20:14,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2023-11-17 15:20:14,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-11-17 15:20:14,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-11-17 15:20:14,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:14,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-11-17 15:20:14,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 15:20:14,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:14,404 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 76 flow. Second operand 3 states and 320 transitions. [2023-11-17 15:20:14,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 44 transitions, 179 flow [2023-11-17 15:20:14,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:14,408 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 82 flow [2023-11-17 15:20:14,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-17 15:20:14,411 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-17 15:20:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 82 flow [2023-11-17 15:20:14,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 15:20:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:14,412 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:20:14,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:20:14,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:20:14,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash 977037810, now seen corresponding path program 1 times [2023-11-17 15:20:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:14,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839946609] [2023-11-17 15:20:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:14,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:14,434 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:14,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:14,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:14,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:20:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:20:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:20:14,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:20:14,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:20:14,448 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:20:14,449 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:14,449 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:20:14,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 157 transitions, 332 flow [2023-11-17 15:20:14,478 INFO L124 PetriNetUnfolderBase]: 17/200 cut-off events. [2023-11-17 15:20:14,478 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:20:14,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 17/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 495 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-11-17 15:20:14,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 157 transitions, 332 flow [2023-11-17 15:20:14,480 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 157 transitions, 332 flow [2023-11-17 15:20:14,480 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:14,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 157 transitions, 332 flow [2023-11-17 15:20:14,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 157 transitions, 332 flow [2023-11-17 15:20:14,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 157 transitions, 332 flow [2023-11-17 15:20:14,495 INFO L124 PetriNetUnfolderBase]: 17/200 cut-off events. [2023-11-17 15:20:14,496 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:20:14,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 17/200 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 495 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-11-17 15:20:14,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 10920 [2023-11-17 15:20:16,892 INFO L134 LiptonReduction]: Checked pairs total: 27225 [2023-11-17 15:20:16,893 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-11-17 15:20:16,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:16,895 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;@1c97bda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:16,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:20:16,897 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:16,897 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2023-11-17 15:20:16,897 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:16,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:16,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:16,897 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 15:20:16,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 867197886, now seen corresponding path program 1 times [2023-11-17 15:20:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:16,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745639029] [2023-11-17 15:20:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:16,988 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 15:20:16,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:16,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745639029] [2023-11-17 15:20:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745639029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:16,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:16,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928137532] [2023-11-17 15:20:16,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:16,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:16,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 309 [2023-11-17 15:20:16,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 15:20:16,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:16,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 309 [2023-11-17 15:20:16,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:17,489 INFO L124 PetriNetUnfolderBase]: 6021/8878 cut-off events. [2023-11-17 15:20:17,489 INFO L125 PetriNetUnfolderBase]: For 811/811 co-relation queries the response was YES. [2023-11-17 15:20:17,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17666 conditions, 8878 events. 6021/8878 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 55213 event pairs, 3061 based on Foata normal form. 0/6757 useless extension candidates. Maximal degree in co-relation 3148. Up to 5332 conditions per place. [2023-11-17 15:20:17,530 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 58 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-17 15:20:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 288 flow [2023-11-17 15:20:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-11-17 15:20:17,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703344120819849 [2023-11-17 15:20:17,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-11-17 15:20:17,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-11-17 15:20:17,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:17,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-11-17 15:20:17,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 15:20:17,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:17,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:17,541 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 116 flow. Second operand 3 states and 436 transitions. [2023-11-17 15:20:17,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 288 flow [2023-11-17 15:20:17,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 284 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:17,545 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 116 flow [2023-11-17 15:20:17,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-17 15:20:17,546 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-11-17 15:20:17,546 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 116 flow [2023-11-17 15:20:17,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 15:20:17,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:17,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:17,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:20:17,546 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 15:20:17,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:17,547 INFO L85 PathProgramCache]: Analyzing trace with hash -606073786, now seen corresponding path program 1 times [2023-11-17 15:20:17,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243781932] [2023-11-17 15:20:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:17,680 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 15:20:17,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243781932] [2023-11-17 15:20:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243781932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:17,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:17,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066995922] [2023-11-17 15:20:17,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:17,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:17,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 309 [2023-11-17 15:20:17,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 15:20:17,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:17,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 309 [2023-11-17 15:20:17,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:18,329 INFO L124 PetriNetUnfolderBase]: 7391/10812 cut-off events. [2023-11-17 15:20:18,329 INFO L125 PetriNetUnfolderBase]: For 1559/1559 co-relation queries the response was YES. [2023-11-17 15:20:18,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22232 conditions, 10812 events. 7391/10812 cut-off events. For 1559/1559 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 64809 event pairs, 5439 based on Foata normal form. 0/8569 useless extension candidates. Maximal degree in co-relation 12263. Up to 9604 conditions per place. [2023-11-17 15:20:18,379 INFO L140 encePairwiseOnDemand]: 303/309 looper letters, 58 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-11-17 15:20:18,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 302 flow [2023-11-17 15:20:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-11-17 15:20:18,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-17 15:20:18,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-11-17 15:20:18,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-11-17 15:20:18,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:18,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-11-17 15:20:18,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:18,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:18,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:18,384 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 116 flow. Second operand 3 states and 412 transitions. [2023-11-17 15:20:18,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 302 flow [2023-11-17 15:20:18,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:18,386 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 145 flow [2023-11-17 15:20:18,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-17 15:20:18,387 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-11-17 15:20:18,387 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 145 flow [2023-11-17 15:20:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 15:20:18,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:20:18,388 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 15:20:18,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 468202259, now seen corresponding path program 1 times [2023-11-17 15:20:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399184467] [2023-11-17 15:20:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:18,419 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 15:20:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:18,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399184467] [2023-11-17 15:20:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399184467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:18,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:18,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:18,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323661125] [2023-11-17 15:20:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:18,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:18,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:18,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 309 [2023-11-17 15:20:18,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 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 15:20:18,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:18,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 309 [2023-11-17 15:20:18,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:19,125 INFO L124 PetriNetUnfolderBase]: 8780/12618 cut-off events. [2023-11-17 15:20:19,126 INFO L125 PetriNetUnfolderBase]: For 3531/3776 co-relation queries the response was YES. [2023-11-17 15:20:19,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29425 conditions, 12618 events. 8780/12618 cut-off events. For 3531/3776 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 78937 event pairs, 4319 based on Foata normal form. 494/11192 useless extension candidates. Maximal degree in co-relation 22407. Up to 7845 conditions per place. [2023-11-17 15:20:19,189 INFO L140 encePairwiseOnDemand]: 306/309 looper letters, 66 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-17 15:20:19,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 360 flow [2023-11-17 15:20:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-11-17 15:20:19,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494066882416396 [2023-11-17 15:20:19,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-11-17 15:20:19,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-11-17 15:20:19,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:19,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-11-17 15:20:19,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:19,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:19,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 309.0) internal successors, (1236), 4 states have internal predecessors, (1236), 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 15:20:19,193 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 145 flow. Second operand 3 states and 431 transitions. [2023-11-17 15:20:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 360 flow [2023-11-17 15:20:19,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 77 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:20:19,197 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 150 flow [2023-11-17 15:20:19,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=309, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-17 15:20:19,198 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-11-17 15:20:19,198 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 150 flow [2023-11-17 15:20:19,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 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 15:20:19,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:19,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:20:19,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:20:19,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:20:19,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -917310653, now seen corresponding path program 1 times [2023-11-17 15:20:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:19,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011326942] [2023-11-17 15:20:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:19,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:20:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:20:19,258 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:20:19,258 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:20:19,258 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:20:19,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:20:19,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:20:19,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:20:19,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:20:19,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:20:19,259 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:20:19,259 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:20:19,259 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:20:19,282 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:20:19,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 193 transitions, 414 flow [2023-11-17 15:20:19,308 INFO L124 PetriNetUnfolderBase]: 22/251 cut-off events. [2023-11-17 15:20:19,308 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:20:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 251 events. 22/251 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 714 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2023-11-17 15:20:19,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 193 transitions, 414 flow [2023-11-17 15:20:19,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 193 transitions, 414 flow [2023-11-17 15:20:19,311 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:20:19,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 193 transitions, 414 flow [2023-11-17 15:20:19,311 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 193 transitions, 414 flow [2023-11-17 15:20:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 193 transitions, 414 flow [2023-11-17 15:20:19,327 INFO L124 PetriNetUnfolderBase]: 22/251 cut-off events. [2023-11-17 15:20:19,327 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:20:19,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 251 events. 22/251 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 714 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 208. Up to 10 conditions per place. [2023-11-17 15:20:19,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 19600 [2023-11-17 15:20:22,019 INFO L134 LiptonReduction]: Checked pairs total: 53039 [2023-11-17 15:20:22,019 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-11-17 15:20:22,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:20:22,021 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;@1c97bda8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:20:22,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:20:22,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:20:22,022 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2023-11-17 15:20:22,022 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:20:22,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:22,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:22,023 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 15:20:22,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 619867687, now seen corresponding path program 1 times [2023-11-17 15:20:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:22,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215660877] [2023-11-17 15:20:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:22,070 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 15:20:22,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:22,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215660877] [2023-11-17 15:20:22,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215660877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:22,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:22,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380858375] [2023-11-17 15:20:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:22,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 377 [2023-11-17 15:20:22,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 15:20:22,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:22,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 377 [2023-11-17 15:20:22,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:27,016 INFO L124 PetriNetUnfolderBase]: 69231/95729 cut-off events. [2023-11-17 15:20:27,017 INFO L125 PetriNetUnfolderBase]: For 14878/14878 co-relation queries the response was YES. [2023-11-17 15:20:27,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189610 conditions, 95729 events. 69231/95729 cut-off events. For 14878/14878 co-relation queries the response was YES. Maximal size of possible extension queue 4027. Compared 686213 event pairs, 32214 based on Foata normal form. 0/73718 useless extension candidates. Maximal degree in co-relation 19738. Up to 56353 conditions per place. [2023-11-17 15:20:27,507 INFO L140 encePairwiseOnDemand]: 369/377 looper letters, 78 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-17 15:20:27,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 395 flow [2023-11-17 15:20:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-11-17 15:20:27,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48629531388152075 [2023-11-17 15:20:27,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-11-17 15:20:27,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-11-17 15:20:27,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:27,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-11-17 15:20:27,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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 15:20:27,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:20:27,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:20:27,513 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 156 flow. Second operand 3 states and 550 transitions. [2023-11-17 15:20:27,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 395 flow [2023-11-17 15:20:27,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 383 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:20:27,519 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 148 flow [2023-11-17 15:20:27,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-17 15:20:27,521 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-11-17 15:20:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 148 flow [2023-11-17 15:20:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 15:20:27,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:27,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:27,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:20:27,522 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 15:20:27,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1139812234, now seen corresponding path program 1 times [2023-11-17 15:20:27,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74619036] [2023-11-17 15:20:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:27,575 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 15:20:27,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:27,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74619036] [2023-11-17 15:20:27,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74619036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:27,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:27,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261785921] [2023-11-17 15:20:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:27,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:27,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-11-17 15:20:27,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 15:20:27,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:27,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-11-17 15:20:27,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:34,276 INFO L124 PetriNetUnfolderBase]: 95255/129835 cut-off events. [2023-11-17 15:20:34,276 INFO L125 PetriNetUnfolderBase]: For 17966/17966 co-relation queries the response was YES. [2023-11-17 15:20:34,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262558 conditions, 129835 events. 95255/129835 cut-off events. For 17966/17966 co-relation queries the response was YES. Maximal size of possible extension queue 5042. Compared 910183 event pairs, 70092 based on Foata normal form. 0/103483 useless extension candidates. Maximal degree in co-relation 147150. Up to 113611 conditions per place. [2023-11-17 15:20:34,936 INFO L140 encePairwiseOnDemand]: 370/377 looper letters, 78 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2023-11-17 15:20:34,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 95 transitions, 403 flow [2023-11-17 15:20:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-11-17 15:20:34,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45446507515473034 [2023-11-17 15:20:34,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-11-17 15:20:34,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-11-17 15:20:34,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:34,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-11-17 15:20:34,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 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 15:20:34,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:20:34,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:20:34,941 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 148 flow. Second operand 3 states and 514 transitions. [2023-11-17 15:20:34,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 95 transitions, 403 flow [2023-11-17 15:20:34,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 399 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:34,959 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 184 flow [2023-11-17 15:20:34,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2023-11-17 15:20:34,959 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-11-17 15:20:34,959 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 184 flow [2023-11-17 15:20:34,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 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 15:20:34,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:34,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:34,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:20:34,960 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 15:20:34,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -483556395, now seen corresponding path program 1 times [2023-11-17 15:20:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:34,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018547891] [2023-11-17 15:20:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:34,987 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 15:20:34,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018547891] [2023-11-17 15:20:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018547891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:34,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072468530] [2023-11-17 15:20:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:34,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 377 [2023-11-17 15:20:34,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:34,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:34,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 377 [2023-11-17 15:20:34,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:41,724 INFO L124 PetriNetUnfolderBase]: 91212/124781 cut-off events. [2023-11-17 15:20:41,724 INFO L125 PetriNetUnfolderBase]: For 32508/34688 co-relation queries the response was YES. [2023-11-17 15:20:41,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279167 conditions, 124781 events. 91212/124781 cut-off events. For 32508/34688 co-relation queries the response was YES. Maximal size of possible extension queue 4751. Compared 890209 event pairs, 43411 based on Foata normal form. 3637/110276 useless extension candidates. Maximal degree in co-relation 216545. Up to 74490 conditions per place. [2023-11-17 15:20:42,383 INFO L140 encePairwiseOnDemand]: 374/377 looper letters, 84 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-11-17 15:20:42,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 461 flow [2023-11-17 15:20:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:20:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:20:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-11-17 15:20:42,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47480106100795755 [2023-11-17 15:20:42,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-11-17 15:20:42,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-11-17 15:20:42,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:42,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-11-17 15:20:42,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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 15:20:42,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:20:42,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:20:42,389 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 184 flow. Second operand 3 states and 537 transitions. [2023-11-17 15:20:42,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 461 flow [2023-11-17 15:20:42,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:20:42,506 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 188 flow [2023-11-17 15:20:42,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-11-17 15:20:42,507 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 5 predicate places. [2023-11-17 15:20:42,507 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 188 flow [2023-11-17 15:20:42,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:20:42,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:42,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:42,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:20:42,508 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 15:20:42,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash -144916715, now seen corresponding path program 1 times [2023-11-17 15:20:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:42,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059573845] [2023-11-17 15:20:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:20:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059573845] [2023-11-17 15:20:42,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059573845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:42,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:20:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22421563] [2023-11-17 15:20:42,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:42,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:20:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:20:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:20:42,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 377 [2023-11-17 15:20:42,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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 15:20:42,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:42,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 377 [2023-11-17 15:20:42,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:20:50,937 INFO L124 PetriNetUnfolderBase]: 115398/157296 cut-off events. [2023-11-17 15:20:50,938 INFO L125 PetriNetUnfolderBase]: For 51620/52373 co-relation queries the response was YES. [2023-11-17 15:20:51,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355096 conditions, 157296 events. 115398/157296 cut-off events. For 51620/52373 co-relation queries the response was YES. Maximal size of possible extension queue 5389. Compared 1108146 event pairs, 82917 based on Foata normal form. 132/135834 useless extension candidates. Maximal degree in co-relation 163462. Up to 131918 conditions per place. [2023-11-17 15:20:51,916 INFO L140 encePairwiseOnDemand]: 370/377 looper letters, 79 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2023-11-17 15:20:51,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 468 flow [2023-11-17 15:20:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 15:20:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 15:20:51,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 637 transitions. [2023-11-17 15:20:51,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2023-11-17 15:20:51,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 637 transitions. [2023-11-17 15:20:51,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 637 transitions. [2023-11-17 15:20:51,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:20:51,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 637 transitions. [2023-11-17 15:20:51,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 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 15:20:51,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 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 15:20:51,922 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 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 15:20:51,922 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 188 flow. Second operand 4 states and 637 transitions. [2023-11-17 15:20:51,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 468 flow [2023-11-17 15:20:51,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 462 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:20:51,971 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 241 flow [2023-11-17 15:20:51,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-11-17 15:20:51,972 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-11-17 15:20:51,972 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 241 flow [2023-11-17 15:20:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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 15:20:51,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:20:51,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:20:51,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:20:51,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:20:51,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:20:51,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1726471167, now seen corresponding path program 1 times [2023-11-17 15:20:51,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:20:51,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016955199] [2023-11-17 15:20:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:20:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:20:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:20:52,039 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 15:20:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:20:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016955199] [2023-11-17 15:20:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016955199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:20:52,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:20:52,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:20:52,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319735307] [2023-11-17 15:20:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:20:52,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:20:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:20:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:20:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:20:52,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 377 [2023-11-17 15:20:52,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 241 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 15:20:52,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:20:52,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 377 [2023-11-17 15:20:52,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:01,641 INFO L124 PetriNetUnfolderBase]: 125372/170369 cut-off events. [2023-11-17 15:21:01,641 INFO L125 PetriNetUnfolderBase]: For 89802/90368 co-relation queries the response was YES. [2023-11-17 15:21:01,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410072 conditions, 170369 events. 125372/170369 cut-off events. For 89802/90368 co-relation queries the response was YES. Maximal size of possible extension queue 5655. Compared 1199583 event pairs, 90145 based on Foata normal form. 0/147512 useless extension candidates. Maximal degree in co-relation 277514. Up to 150217 conditions per place. [2023-11-17 15:21:02,741 INFO L140 encePairwiseOnDemand]: 370/377 looper letters, 87 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2023-11-17 15:21:02,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 109 transitions, 587 flow [2023-11-17 15:21:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-11-17 15:21:02,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526967285587975 [2023-11-17 15:21:02,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-11-17 15:21:02,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-11-17 15:21:02,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:02,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-11-17 15:21:02,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 15:21:02,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:21:02,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:21:02,745 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 241 flow. Second operand 3 states and 512 transitions. [2023-11-17 15:21:02,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 109 transitions, 587 flow [2023-11-17 15:21:02,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 569 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:21:02,820 INFO L231 Difference]: Finished difference. Result has 69 places, 78 transitions, 335 flow [2023-11-17 15:21:02,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=335, PETRI_PLACES=69, PETRI_TRANSITIONS=78} [2023-11-17 15:21:02,820 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-11-17 15:21:02,820 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 78 transitions, 335 flow [2023-11-17 15:21:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 15:21:02,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:02,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:02,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:21:02,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:21:02,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1635716157, now seen corresponding path program 1 times [2023-11-17 15:21:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467497535] [2023-11-17 15:21:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:02,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:21:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-17 15:21:02,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:21:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467497535] [2023-11-17 15:21:02,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467497535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:21:02,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:21:02,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:21:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625403983] [2023-11-17 15:21:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:21:02,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:21:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:21:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:21:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:21:02,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 377 [2023-11-17 15:21:02,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 78 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 15:21:02,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:21:02,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 377 [2023-11-17 15:21:02,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:21:12,216 INFO L124 PetriNetUnfolderBase]: 124431/164086 cut-off events. [2023-11-17 15:21:12,216 INFO L125 PetriNetUnfolderBase]: For 158337/166612 co-relation queries the response was YES. [2023-11-17 15:21:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441447 conditions, 164086 events. 124431/164086 cut-off events. For 158337/166612 co-relation queries the response was YES. Maximal size of possible extension queue 5393. Compared 1104243 event pairs, 61807 based on Foata normal form. 10857/152395 useless extension candidates. Maximal degree in co-relation 333390. Up to 103082 conditions per place. [2023-11-17 15:21:13,219 INFO L140 encePairwiseOnDemand]: 374/377 looper letters, 107 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-11-17 15:21:13,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 122 transitions, 755 flow [2023-11-17 15:21:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:21:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:21:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-11-17 15:21:13,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739168877099912 [2023-11-17 15:21:13,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-11-17 15:21:13,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-11-17 15:21:13,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:21:13,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-11-17 15:21:13,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 15:21:13,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:21:13,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 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 15:21:13,223 INFO L175 Difference]: Start difference. First operand has 69 places, 78 transitions, 335 flow. Second operand 3 states and 536 transitions. [2023-11-17 15:21:13,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 122 transitions, 755 flow [2023-11-17 15:21:13,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 122 transitions, 737 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:21:13,469 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 342 flow [2023-11-17 15:21:13,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-11-17 15:21:13,470 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-11-17 15:21:13,470 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 342 flow [2023-11-17 15:21:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 15:21:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:21:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:13,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:21:13,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:21:13,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:21:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -518404509, now seen corresponding path program 1 times [2023-11-17 15:21:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:21:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465053533] [2023-11-17 15:21:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:21:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:21:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:13,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:21:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:21:13,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:21:13,487 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:21:13,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:21:13,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:21:13,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:21:13,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:21:13,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:21:13,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:21:13,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 15:21:13,488 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:21:13,488 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:21:13,489 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:21:13,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:21:13,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:13,531 INFO L124 PetriNetUnfolderBase]: 27/302 cut-off events. [2023-11-17 15:21:13,531 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:21:13,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 302 events. 27/302 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 927 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 264. Up to 12 conditions per place. [2023-11-17 15:21:13,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:13,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:13,534 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:21:13,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:13,534 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:13,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 229 transitions, 498 flow [2023-11-17 15:21:13,555 INFO L124 PetriNetUnfolderBase]: 27/302 cut-off events. [2023-11-17 15:21:13,555 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:21:13,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 302 events. 27/302 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 927 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 264. Up to 12 conditions per place. [2023-11-17 15:21:13,564 INFO L119 LiptonReduction]: Number of co-enabled transitions 30800