/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:21:05,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:21:05,098 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:21:05,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:21:05,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:21:05,123 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:21:05,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:21:05,124 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:21:05,125 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:21:05,128 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:21:05,129 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:21:05,129 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:21:05,130 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:21:05,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:21:05,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:21:05,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:21:05,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:21:05,132 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:21:05,132 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:21:05,132 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:21:05,132 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:21:05,133 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:21:05,134 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:21:05,134 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:21:05,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:21:05,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:05,134 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:21:05,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:21:05,135 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:21:05,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:21:05,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:21:05,136 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:21:05,137 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:21:05,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:21:05,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:21:05,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:21:05,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:21:05,418 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:21:05,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2.i [2023-11-17 11:21:06,677 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:21:06,926 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:21:06,927 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2.i [2023-11-17 11:21:06,940 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362de20cd/4aab236847bd43ea8e8fd28adb04e0df/FLAGdcba30d97 [2023-11-17 11:21:06,954 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/362de20cd/4aab236847bd43ea8e8fd28adb04e0df [2023-11-17 11:21:06,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:21:06,957 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:21:06,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:06,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:21:06,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:21:06,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:06" (1/1) ... [2023-11-17 11:21:06,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20517aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:06, skipping insertion in model container [2023-11-17 11:21:06,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:21:06" (1/1) ... [2023-11-17 11:21:07,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:21:07,365 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-ext/25_stack_longest-2.i[31183,31196] [2023-11-17 11:21:07,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:07,394 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:21:07,455 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-ext/25_stack_longest-2.i[31183,31196] [2023-11-17 11:21:07,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:21:07,499 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:21:07,499 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:21:07,506 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:21:07,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07 WrapperNode [2023-11-17 11:21:07,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:21:07,510 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:07,510 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:21:07,510 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:21:07,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,576 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-17 11:21:07,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:21:07,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:21:07,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:21:07,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:21:07,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:21:07,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:21:07,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:21:07,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:21:07,622 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (1/1) ... [2023-11-17 11:21:07,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:21:07,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:21:07,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:21:07,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:21:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:21:07,697 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:21:07,698 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:21:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:21:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:21:07,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:21:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:21:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:21:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:21:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:21:07,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:21:07,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:21:07,701 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:21:07,861 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:21:07,863 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:21:08,267 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:21:08,534 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:21:08,535 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:21:08,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:08 BoogieIcfgContainer [2023-11-17 11:21:08,538 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:21:08,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:21:08,542 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:21:08,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:21:08,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:21:06" (1/3) ... [2023-11-17 11:21:08,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75826266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:08, skipping insertion in model container [2023-11-17 11:21:08,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:21:07" (2/3) ... [2023-11-17 11:21:08,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75826266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:21:08, skipping insertion in model container [2023-11-17 11:21:08,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:21:08" (3/3) ... [2023-11-17 11:21:08,548 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2023-11-17 11:21:08,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:21:08,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:21:08,565 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:21:08,614 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:08,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:21:08,691 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 11:21:08,691 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:08,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 5/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:21:08,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:21:08,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 34 transitions, 72 flow [2023-11-17 11:21:08,705 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:08,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 34 transitions, 72 flow [2023-11-17 11:21:08,721 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 34 transitions, 72 flow [2023-11-17 11:21:08,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:21:08,740 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 11:21:08,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:08,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 5/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-17 11:21:08,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-17 11:21:10,452 INFO L134 LiptonReduction]: Checked pairs total: 395 [2023-11-17 11:21:10,453 INFO L136 LiptonReduction]: Total number of compositions: 23 [2023-11-17 11:21:10,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:10,472 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@334654a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:10,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:21:10,476 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:10,494 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:21:10,494 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:21:10,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:10,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:21:10,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:21:10,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash -534379152, now seen corresponding path program 1 times [2023-11-17 11:21:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427427536] [2023-11-17 11:21:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:10,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:10,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:10,651 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:10,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:21:10,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:21:10,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:21:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:21:10,655 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:21:10,662 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:10,662 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:21:10,727 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:10,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:21:10,754 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2023-11-17 11:21:10,754 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:10,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 10/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2023-11-17 11:21:10,756 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:21:10,758 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 63 transitions, 136 flow [2023-11-17 11:21:10,758 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:10,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 63 transitions, 136 flow [2023-11-17 11:21:10,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 63 transitions, 136 flow [2023-11-17 11:21:10,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:21:10,774 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2023-11-17 11:21:10,775 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 10/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 128 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2023-11-17 11:21:10,778 INFO L119 LiptonReduction]: Number of co-enabled transitions 2072 [2023-11-17 11:21:12,719 INFO L134 LiptonReduction]: Checked pairs total: 5014 [2023-11-17 11:21:12,719 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:21:12,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:12,722 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;@334654a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:12,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:21:12,727 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:12,727 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 11:21:12,727 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:21:12,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:12,727 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:21:12,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:21:12,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1131810389, now seen corresponding path program 1 times [2023-11-17 11:21:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479046048] [2023-11-17 11:21:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:12,773 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:12,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:12,793 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:12,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:21:12,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:21:12,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:21:12,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:21:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:21:12,794 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:21:12,794 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:12,795 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:21:12,842 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:12,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:21:12,858 INFO L124 PetriNetUnfolderBase]: 15/100 cut-off events. [2023-11-17 11:21:12,858 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:21:12,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 15/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-17 11:21:12,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:21:12,861 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 92 transitions, 202 flow [2023-11-17 11:21:12,861 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:12,861 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 92 transitions, 202 flow [2023-11-17 11:21:12,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 92 transitions, 202 flow [2023-11-17 11:21:12,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:21:12,877 INFO L124 PetriNetUnfolderBase]: 15/100 cut-off events. [2023-11-17 11:21:12,877 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:21:12,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 15/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-17 11:21:12,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 5544 [2023-11-17 11:21:15,955 INFO L134 LiptonReduction]: Checked pairs total: 13994 [2023-11-17 11:21:15,955 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 11:21:15,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:15,958 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;@334654a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:15,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:21:15,964 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:15,965 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-17 11:21:15,965 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:21:15,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:15,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:15,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:21:15,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash -727752334, now seen corresponding path program 1 times [2023-11-17 11:21:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:15,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417803013] [2023-11-17 11:21:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:16,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417803013] [2023-11-17 11:21:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417803013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:16,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:16,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:21:16,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864211586] [2023-11-17 11:21:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:16,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:16,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 140 [2023-11-17 11:21:16,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:16,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:16,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 140 [2023-11-17 11:21:16,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:19,436 INFO L124 PetriNetUnfolderBase]: 23176/31845 cut-off events. [2023-11-17 11:21:19,436 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-11-17 11:21:19,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63490 conditions, 31845 events. 23176/31845 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 168482 event pairs, 5329 based on Foata normal form. 0/25245 useless extension candidates. Maximal degree in co-relation 27980. Up to 28462 conditions per place. [2023-11-17 11:21:19,702 INFO L140 encePairwiseOnDemand]: 129/140 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-17 11:21:19,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 330 flow [2023-11-17 11:21:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-17 11:21:19,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2023-11-17 11:21:19,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-17 11:21:19,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-17 11:21:19,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:19,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-17 11:21:19,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:19,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:19,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:19,732 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 136 flow. Second operand 3 states and 141 transitions. [2023-11-17 11:21:19,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 330 flow [2023-11-17 11:21:19,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 326 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:21:19,741 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 156 flow [2023-11-17 11:21:19,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-11-17 11:21:19,747 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 11:21:19,747 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 156 flow [2023-11-17 11:21:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:19,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:19,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:19,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:21:19,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:21:19,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1088314381, now seen corresponding path program 1 times [2023-11-17 11:21:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:19,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544968318] [2023-11-17 11:21:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:19,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:19,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:19,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544968318] [2023-11-17 11:21:19,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544968318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:19,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:19,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:21:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374250070] [2023-11-17 11:21:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:19,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:21:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:21:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:21:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 140 [2023-11-17 11:21:19,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:19,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:19,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 140 [2023-11-17 11:21:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:23,966 INFO L124 PetriNetUnfolderBase]: 34341/46535 cut-off events. [2023-11-17 11:21:23,967 INFO L125 PetriNetUnfolderBase]: For 2734/2734 co-relation queries the response was YES. [2023-11-17 11:21:24,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98360 conditions, 46535 events. 34341/46535 cut-off events. For 2734/2734 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 255643 event pairs, 6703 based on Foata normal form. 0/37607 useless extension candidates. Maximal degree in co-relation 82666. Up to 31026 conditions per place. [2023-11-17 11:21:24,231 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 142 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2023-11-17 11:21:24,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 151 transitions, 684 flow [2023-11-17 11:21:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:21:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:21:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-17 11:21:24,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2023-11-17 11:21:24,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-17 11:21:24,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-17 11:21:24,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:24,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-17 11:21:24,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:24,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:24,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:24,243 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 156 flow. Second operand 5 states and 234 transitions. [2023-11-17 11:21:24,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 151 transitions, 684 flow [2023-11-17 11:21:24,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 151 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:21:24,251 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 178 flow [2023-11-17 11:21:24,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-17 11:21:24,252 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-11-17 11:21:24,253 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 178 flow [2023-11-17 11:21:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:24,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:24,253 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:21:24,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:21:24,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:21:24,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash -781965201, now seen corresponding path program 1 times [2023-11-17 11:21:24,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:24,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555475761] [2023-11-17 11:21:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:24,278 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:21:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:21:24,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:21:24,304 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:21:24,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:21:24,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:21:24,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:21:24,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:21:24,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:21:24,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:21:24,306 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:21:24,307 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:21:24,307 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:21:24,367 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:21:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:21:24,394 INFO L124 PetriNetUnfolderBase]: 20/132 cut-off events. [2023-11-17 11:21:24,394 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:21:24,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 20/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 406 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2023-11-17 11:21:24,395 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:21:24,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 121 transitions, 270 flow [2023-11-17 11:21:24,397 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:21:24,398 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 121 transitions, 270 flow [2023-11-17 11:21:24,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 121 transitions, 270 flow [2023-11-17 11:21:24,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:21:24,413 INFO L124 PetriNetUnfolderBase]: 20/132 cut-off events. [2023-11-17 11:21:24,414 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:21:24,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 20/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 406 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2023-11-17 11:21:24,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 10640 [2023-11-17 11:21:28,438 INFO L134 LiptonReduction]: Checked pairs total: 27086 [2023-11-17 11:21:28,439 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-17 11:21:28,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:21:28,447 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;@334654a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:21:28,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:21:28,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:21:28,453 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-11-17 11:21:28,456 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:21:28,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:28,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:28,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:21:28,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1771119736, now seen corresponding path program 1 times [2023-11-17 11:21:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:28,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350144982] [2023-11-17 11:21:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:28,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350144982] [2023-11-17 11:21:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350144982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:28,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:21:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914833619] [2023-11-17 11:21:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:28,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:21:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:21:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:21:28,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 185 [2023-11-17 11:21:28,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:28,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:28,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 185 [2023-11-17 11:21:28,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand