/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:20:18,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:20:18,924 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 11:20:18,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:20:18,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:20:18,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:20:18,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:20:18,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:20:18,952 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:20:18,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:20:18,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:20:18,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:20:18,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:20:18,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:20:18,958 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:20:18,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:20:18,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:20:18,958 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:20:18,959 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:20:18,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:20:18,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:20:18,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:20:18,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:20:18,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:20:18,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:20:18,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:20:18,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:20:19,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:20:19,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:20:19,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:20:19,145 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:20:19,147 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:20:19,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2.i [2023-11-17 11:20:20,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:20:20,470 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:20:20,476 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-2.i [2023-11-17 11:20:20,486 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad5c2a46/be6690d9e83b43b093e7a674a3582372/FLAGf490adcad [2023-11-17 11:20:20,497 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad5c2a46/be6690d9e83b43b093e7a674a3582372 [2023-11-17 11:20:20,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:20:20,501 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:20:20,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:20:20,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:20:20,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:20:20,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24918f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20, skipping insertion in model container [2023-11-17 11:20:20,506 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:20:20,788 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_longer-2.i[31179,31192] [2023-11-17 11:20:20,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:20:20,810 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:20:20,852 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_longer-2.i[31179,31192] [2023-11-17 11:20:20,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:20:20,875 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:20:20,875 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:20:20,882 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:20:20,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20 WrapperNode [2023-11-17 11:20:20,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:20:20,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:20:20,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:20:20,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:20:20,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,929 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-17 11:20:20,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:20:20,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:20:20,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:20:20,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:20:20,938 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:20:20,960 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:20:20,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:20:20,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:20:20,961 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (1/1) ... [2023-11-17 11:20:20,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:20:20,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:20:21,022 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 11:20:21,062 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 11:20:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:20:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:20:21,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:20:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:20:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:20:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:20:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:20:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:20:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:20:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:20:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:20:21,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:20:21,073 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 11:20:21,208 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:20:21,211 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:20:21,465 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:20:21,689 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:20:21,690 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:20:21,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:20:21 BoogieIcfgContainer [2023-11-17 11:20:21,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:20:21,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:20:21,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:20:21,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:20:21,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:20:20" (1/3) ... [2023-11-17 11:20:21,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2782e69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:20:21, skipping insertion in model container [2023-11-17 11:20:21,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:20" (2/3) ... [2023-11-17 11:20:21,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2782e69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:20:21, skipping insertion in model container [2023-11-17 11:20:21,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:20:21" (3/3) ... [2023-11-17 11:20:21,697 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-2.i [2023-11-17 11:20:21,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:20:21,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:20:21,711 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:20:21,760 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:21,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:21,819 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 11:20:21,819 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:21,822 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 11:20:21,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:21,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:21,832 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:21,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:21,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:21,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 34 transitions, 72 flow [2023-11-17 11:20:21,862 INFO L124 PetriNetUnfolderBase]: 5/36 cut-off events. [2023-11-17 11:20:21,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:21,863 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 11:20:21,864 INFO L119 LiptonReduction]: Number of co-enabled transitions 224 [2023-11-17 11:20:23,196 INFO L134 LiptonReduction]: Checked pairs total: 395 [2023-11-17 11:20:23,196 INFO L136 LiptonReduction]: Total number of compositions: 23 [2023-11-17 11:20:23,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:23,212 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;@598348f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:23,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:20:23,215 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:23,215 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-17 11:20:23,215 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:23,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:23,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:20:23,216 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 11:20:23,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash -534379152, now seen corresponding path program 1 times [2023-11-17 11:20:23,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:23,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692366620] [2023-11-17 11:20:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:23,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:23,298 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:23,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:23,324 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:23,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:20:23,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:20:23,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:20:23,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:20:23,327 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:20:23,329 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:23,329 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:20:23,355 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:23,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:23,366 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2023-11-17 11:20:23,366 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:23,367 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 11:20:23,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:23,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:23,368 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:23,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:23,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 63 transitions, 136 flow [2023-11-17 11:20:23,376 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2023-11-17 11:20:23,376 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:23,377 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 11:20:23,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 2072 [2023-11-17 11:20:24,859 INFO L134 LiptonReduction]: Checked pairs total: 5014 [2023-11-17 11:20:24,859 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:20:24,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:24,861 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;@598348f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:24,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:20:24,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:24,865 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 11:20:24,865 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:24,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:24,866 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:20:24,866 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 11:20:24,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1131810389, now seen corresponding path program 1 times [2023-11-17 11:20:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:24,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494035190] [2023-11-17 11:20:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:24,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:24,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:24,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:24,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:24,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:20:24,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:20:24,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:20:24,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:20:24,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:20:24,939 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:20:24,940 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:24,940 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:20:24,987 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:24,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:25,016 INFO L124 PetriNetUnfolderBase]: 15/100 cut-off events. [2023-11-17 11:20:25,016 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:20:25,019 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 11:20:25,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:25,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:25,020 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:25,020 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:25,021 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:25,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 92 transitions, 202 flow [2023-11-17 11:20:25,039 INFO L124 PetriNetUnfolderBase]: 15/100 cut-off events. [2023-11-17 11:20:25,039 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:20:25,040 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 11:20:25,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 5544 [2023-11-17 11:20:27,316 INFO L134 LiptonReduction]: Checked pairs total: 13994 [2023-11-17 11:20:27,316 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 11:20:27,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:27,324 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;@598348f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:27,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:20:27,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:27,330 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-11-17 11:20:27,330 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:20:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:27,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:27,331 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 11:20:27,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash -727752334, now seen corresponding path program 1 times [2023-11-17 11:20:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:27,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46000823] [2023-11-17 11:20:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:27,490 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 11:20:27,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:27,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46000823] [2023-11-17 11:20:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46000823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:27,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179216086] [2023-11-17 11:20:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:27,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 140 [2023-11-17 11:20:27,516 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 11:20:27,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:27,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 140 [2023-11-17 11:20:27,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:29,947 INFO L124 PetriNetUnfolderBase]: 23176/31845 cut-off events. [2023-11-17 11:20:29,948 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-11-17 11:20:29,989 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 11:20:30,123 INFO L140 encePairwiseOnDemand]: 129/140 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-17 11:20:30,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 330 flow [2023-11-17 11:20:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:20:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:20:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-17 11:20:30,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2023-11-17 11:20:30,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-17 11:20:30,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-17 11:20:30,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:30,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-17 11:20:30,139 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 11:20:30,142 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 11:20:30,142 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 11:20:30,143 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 136 flow. Second operand 3 states and 141 transitions. [2023-11-17 11:20:30,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 330 flow [2023-11-17 11:20:30,148 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 11:20:30,150 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 156 flow [2023-11-17 11:20:30,151 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 11:20:30,155 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 11:20:30,155 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 156 flow [2023-11-17 11:20:30,155 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 11:20:30,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:30,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:30,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:20:30,156 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 11:20:30,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1088314381, now seen corresponding path program 1 times [2023-11-17 11:20:30,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:30,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417332507] [2023-11-17 11:20:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:30,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:30,281 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 11:20:30,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417332507] [2023-11-17 11:20:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417332507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:30,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:30,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:20:30,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262349819] [2023-11-17 11:20:30,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:30,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:20:30,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:30,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:20:30,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:20:30,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 140 [2023-11-17 11:20:30,283 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 11:20:30,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:30,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 140 [2023-11-17 11:20:30,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:33,626 INFO L124 PetriNetUnfolderBase]: 34341/46535 cut-off events. [2023-11-17 11:20:33,627 INFO L125 PetriNetUnfolderBase]: For 2734/2734 co-relation queries the response was YES. [2023-11-17 11:20:33,723 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 11:20:33,919 INFO L140 encePairwiseOnDemand]: 133/140 looper letters, 142 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2023-11-17 11:20:33,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 151 transitions, 684 flow [2023-11-17 11:20:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:20:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:20:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-17 11:20:33,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342857142857143 [2023-11-17 11:20:33,924 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-17 11:20:33,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-17 11:20:33,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:33,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-17 11:20:33,927 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 11:20:33,929 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 11:20:33,929 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 11:20:33,930 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 156 flow. Second operand 5 states and 234 transitions. [2023-11-17 11:20:33,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 151 transitions, 684 flow [2023-11-17 11:20:33,935 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 11:20:33,937 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 178 flow [2023-11-17 11:20:33,937 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 11:20:33,938 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-11-17 11:20:33,938 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 178 flow [2023-11-17 11:20:33,938 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 11:20:33,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:33,938 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:20:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:20:33,942 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 11:20:33,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:33,943 INFO L85 PathProgramCache]: Analyzing trace with hash -781965201, now seen corresponding path program 1 times [2023-11-17 11:20:33,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:33,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119894851] [2023-11-17 11:20:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:33,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:33,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:33,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:33,981 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:33,981 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:20:33,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:20:33,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:20:33,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:20:33,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:20:33,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:20:33,983 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:20:33,983 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:33,984 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:20:34,033 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:34,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:34,056 INFO L124 PetriNetUnfolderBase]: 20/132 cut-off events. [2023-11-17 11:20:34,056 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:20:34,058 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 11:20:34,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:34,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:34,059 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:34,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:34,059 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:34,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 270 flow [2023-11-17 11:20:34,072 INFO L124 PetriNetUnfolderBase]: 20/132 cut-off events. [2023-11-17 11:20:34,072 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:20:34,073 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 11:20:34,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 10640 [2023-11-17 11:20:37,333 INFO L134 LiptonReduction]: Checked pairs total: 27086 [2023-11-17 11:20:37,333 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-17 11:20:37,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:37,335 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;@598348f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:37,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:20:37,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:37,338 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-11-17 11:20:37,338 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:20:37,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:37,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:37,339 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 11:20:37,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1771119736, now seen corresponding path program 1 times [2023-11-17 11:20:37,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:37,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787734772] [2023-11-17 11:20:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:37,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:37,399 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 11:20:37,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787734772] [2023-11-17 11:20:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787734772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:37,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:37,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453974933] [2023-11-17 11:20:37,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:37,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:37,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:37,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:37,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 185 [2023-11-17 11:20:37,401 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 11:20:37,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:37,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 185 [2023-11-17 11:20:37,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:12,942 INFO L124 PetriNetUnfolderBase]: 403864/514329 cut-off events. [2023-11-17 11:21:12,942 INFO L125 PetriNetUnfolderBase]: For 25423/25423 co-relation queries the response was YES. [2023-11-17 11:21:13,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027211 conditions, 514329 events. 403864/514329 cut-off events. For 25423/25423 co-relation queries the response was YES. Maximal size of possible extension queue 7975. Compared 3033635 event pairs, 99079 based on Foata normal form. 0/400449 useless extension candidates. Maximal degree in co-relation 280729. Up to 482185 conditions per place. [2023-11-17 11:21:15,767 INFO L140 encePairwiseOnDemand]: 171/185 looper letters, 91 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-11-17 11:21:15,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 443 flow [2023-11-17 11:21:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-17 11:21:15,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:21:15,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-17 11:21:15,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-17 11:21:15,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:15,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-17 11:21:15,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 11:21:15,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 11:21:15,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 11:21:15,772 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 182 flow. Second operand 3 states and 185 transitions. [2023-11-17 11:21:15,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 443 flow [2023-11-17 11:21:15,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 431 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:21:15,787 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 205 flow [2023-11-17 11:21:15,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=185, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-11-17 11:21:15,788 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-11-17 11:21:15,788 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 205 flow [2023-11-17 11:21:15,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 11:21:15,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:15,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:15,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:21:15,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:21:15,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 926734611, now seen corresponding path program 1 times [2023-11-17 11:21:15,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:15,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374812527] [2023-11-17 11:21:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:15,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:15,846 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 11:21:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:15,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374812527] [2023-11-17 11:21:15,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374812527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:15,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:15,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:21:15,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609270022] [2023-11-17 11:21:15,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:15,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:21:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:15,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:21:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:21:15,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 185 [2023-11-17 11:21:15,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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 11:21:15,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:15,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 185 [2023-11-17 11:21:15,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand