/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:06:14,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:06:14,635 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:06:14,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:06:14,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:06:14,668 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:06:14,669 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:06:14,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:06:14,669 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:06:14,673 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:06:14,674 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:06:14,674 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:06:14,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:06:14,675 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:06:14,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:06:14,676 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:06:14,676 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:06:14,676 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:06:14,676 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:06:14,676 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:06:14,677 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:06:14,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:06:14,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:06:14,678 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:06:14,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:06:14,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:06:14,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:06:14,679 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:06:14,679 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:06:14,679 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:06:14,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:06:14,680 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:06:14,680 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:06:14,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:06:14,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:06:14,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:06:14,927 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:06:14,927 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:06:14,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2023-11-17 15:06:16,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:06:16,407 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:06:16,411 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2023-11-17 15:06:16,439 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f1158ab/9877facac833405e808a1d65b37ee978/FLAG408cdb92c [2023-11-17 15:06:16,451 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f1158ab/9877facac833405e808a1d65b37ee978 [2023-11-17 15:06:16,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:06:16,454 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:06:16,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:06:16,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:06:16,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:06:16,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:16,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c418a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16, skipping insertion in model container [2023-11-17 15:06:16,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:16,502 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:06:16,837 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/08_rand_cas.i[30837,30850] [2023-11-17 15:06:16,845 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/08_rand_cas.i[31185,31198] [2023-11-17 15:06:16,849 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/08_rand_cas.i[31448,31461] [2023-11-17 15:06:16,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:06:16,868 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:06:16,918 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/08_rand_cas.i[30837,30850] [2023-11-17 15:06:16,922 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/08_rand_cas.i[31185,31198] [2023-11-17 15:06:16,923 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/08_rand_cas.i[31448,31461] [2023-11-17 15:06:16,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:06:16,960 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:06:16,960 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:06:16,967 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:06:16,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16 WrapperNode [2023-11-17 15:06:16,968 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:06:16,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:06:16,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:06:16,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:06:16,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,000 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,033 INFO L138 Inliner]: procedures = 178, calls = 38, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 146 [2023-11-17 15:06:17,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:06:17,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:06:17,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:06:17,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:06:17,043 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,062 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,076 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:06:17,089 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:06:17,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:06:17,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:06:17,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (1/1) ... [2023-11-17 15:06:17,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:06:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:06:17,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:06:17,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:06:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:06:17,154 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:06:17,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:06:17,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:06:17,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:06:17,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:06:17,159 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:06:17,318 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:06:17,320 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:06:17,528 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:06:17,640 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:06:17,641 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 15:06:17,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:06:17 BoogieIcfgContainer [2023-11-17 15:06:17,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:06:17,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:06:17,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:06:17,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:06:17,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:06:16" (1/3) ... [2023-11-17 15:06:17,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e17fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:17, skipping insertion in model container [2023-11-17 15:06:17,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:16" (2/3) ... [2023-11-17 15:06:17,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e17fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:17, skipping insertion in model container [2023-11-17 15:06:17,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:06:17" (3/3) ... [2023-11-17 15:06:17,659 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2023-11-17 15:06:17,672 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:06:17,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-17 15:06:17,673 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:06:17,732 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:17,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 121 transitions, 246 flow [2023-11-17 15:06:17,825 INFO L124 PetriNetUnfolderBase]: 14/132 cut-off events. [2023-11-17 15:06:17,825 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:17,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 132 events. 14/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 209 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 105. Up to 4 conditions per place. [2023-11-17 15:06:17,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 121 transitions, 246 flow [2023-11-17 15:06:17,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 121 transitions, 246 flow [2023-11-17 15:06:17,842 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:17,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 121 transitions, 246 flow [2023-11-17 15:06:17,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 121 transitions, 246 flow [2023-11-17 15:06:17,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 121 transitions, 246 flow [2023-11-17 15:06:17,886 INFO L124 PetriNetUnfolderBase]: 14/132 cut-off events. [2023-11-17 15:06:17,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:17,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 132 events. 14/132 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 209 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 105. Up to 4 conditions per place. [2023-11-17 15:06:17,890 INFO L119 LiptonReduction]: Number of co-enabled transitions 2576 [2023-11-17 15:06:21,057 INFO L134 LiptonReduction]: Checked pairs total: 2718 [2023-11-17 15:06:21,057 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-11-17 15:06:21,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:21,092 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;@1aebb92f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:21,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:06:21,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:21,099 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-11-17 15:06:21,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:21,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:21,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:06:21,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 15:06:21,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash 638935633, now seen corresponding path program 1 times [2023-11-17 15:06:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240288264] [2023-11-17 15:06:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:21,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:21,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240288264] [2023-11-17 15:06:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240288264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:21,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:21,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707017486] [2023-11-17 15:06:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:21,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:21,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:21,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 255 [2023-11-17 15:06:21,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:21,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:21,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 255 [2023-11-17 15:06:21,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:21,562 INFO L124 PetriNetUnfolderBase]: 28/61 cut-off events. [2023-11-17 15:06:21,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:06:21,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 61 events. 28/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 142 event pairs, 14 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 112. Up to 53 conditions per place. [2023-11-17 15:06:21,564 INFO L140 encePairwiseOnDemand]: 249/255 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-17 15:06:21,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 21 transitions, 86 flow [2023-11-17 15:06:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-11-17 15:06:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40261437908496733 [2023-11-17 15:06:21,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-11-17 15:06:21,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-11-17 15:06:21,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:21,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-11-17 15:06:21,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:21,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:21,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:21,611 INFO L175 Difference]: Start difference. First operand has 18 places, 21 transitions, 46 flow. Second operand 3 states and 308 transitions. [2023-11-17 15:06:21,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 21 transitions, 86 flow [2023-11-17 15:06:21,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:21,616 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 52 flow [2023-11-17 15:06:21,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-17 15:06:21,623 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 2 predicate places. [2023-11-17 15:06:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 52 flow [2023-11-17 15:06:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:21,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:06:21,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:06:21,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 15:06:21,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1667932807, now seen corresponding path program 1 times [2023-11-17 15:06:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556992237] [2023-11-17 15:06:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:21,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:21,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:21,690 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:21,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:06:21,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:06:21,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:06:21,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:06:21,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:06:21,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:06:21,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:06:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:06:21,695 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:06:21,697 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:21,697 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:06:21,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 214 transitions, 438 flow [2023-11-17 15:06:21,780 INFO L124 PetriNetUnfolderBase]: 27/238 cut-off events. [2023-11-17 15:06:21,780 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:21,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 238 events. 27/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 696 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 197. Up to 6 conditions per place. [2023-11-17 15:06:21,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 214 transitions, 438 flow [2023-11-17 15:06:21,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 214 transitions, 438 flow [2023-11-17 15:06:21,788 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:21,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 214 transitions, 438 flow [2023-11-17 15:06:21,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 214 transitions, 438 flow [2023-11-17 15:06:21,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 214 transitions, 438 flow [2023-11-17 15:06:21,846 INFO L124 PetriNetUnfolderBase]: 27/238 cut-off events. [2023-11-17 15:06:21,846 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:06:21,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 238 events. 27/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 696 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 197. Up to 6 conditions per place. [2023-11-17 15:06:21,863 INFO L119 LiptonReduction]: Number of co-enabled transitions 22264 [2023-11-17 15:06:26,247 INFO L134 LiptonReduction]: Checked pairs total: 28022 [2023-11-17 15:06:26,247 INFO L136 LiptonReduction]: Total number of compositions: 234 [2023-11-17 15:06:26,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:26,250 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;@1aebb92f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:26,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-17 15:06:26,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:26,254 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 15:06:26,254 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:06:26,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:26,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:26,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:06:26,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash 81332045, now seen corresponding path program 1 times [2023-11-17 15:06:26,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:26,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418962863] [2023-11-17 15:06:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:26,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:26,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418962863] [2023-11-17 15:06:26,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418962863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:26,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:26,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:06:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455718762] [2023-11-17 15:06:26,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:26,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:06:26,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:06:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:06:26,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 448 [2023-11-17 15:06:26,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:26,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:26,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 448 [2023-11-17 15:06:26,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:26,743 INFO L124 PetriNetUnfolderBase]: 1220/1936 cut-off events. [2023-11-17 15:06:26,743 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-17 15:06:26,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1936 events. 1220/1936 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10398 event pairs, 622 based on Foata normal form. 0/1397 useless extension candidates. Maximal degree in co-relation 1532. Up to 1479 conditions per place. [2023-11-17 15:06:26,756 INFO L140 encePairwiseOnDemand]: 435/448 looper letters, 100 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2023-11-17 15:06:26,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 113 transitions, 471 flow [2023-11-17 15:06:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:06:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:06:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 948 transitions. [2023-11-17 15:06:26,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232142857142857 [2023-11-17 15:06:26,760 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 948 transitions. [2023-11-17 15:06:26,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 948 transitions. [2023-11-17 15:06:26,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:26,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 948 transitions. [2023-11-17 15:06:26,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:26,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:26,771 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 448.0) internal successors, (2688), 6 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:26,771 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 112 flow. Second operand 5 states and 948 transitions. [2023-11-17 15:06:26,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 113 transitions, 471 flow [2023-11-17 15:06:26,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 113 transitions, 471 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:26,774 INFO L231 Difference]: Finished difference. Result has 49 places, 53 transitions, 163 flow [2023-11-17 15:06:26,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=49, PETRI_TRANSITIONS=53} [2023-11-17 15:06:26,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-11-17 15:06:26,775 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 53 transitions, 163 flow [2023-11-17 15:06:26,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:26,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:26,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:26,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:06:26,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:06:26,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash -58943388, now seen corresponding path program 1 times [2023-11-17 15:06:26,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:26,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631457558] [2023-11-17 15:06:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631457558] [2023-11-17 15:06:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631457558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:26,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:26,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241700792] [2023-11-17 15:06:26,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:26,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:26,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 448 [2023-11-17 15:06:26,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 53 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:26,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:26,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 448 [2023-11-17 15:06:26,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:27,043 INFO L124 PetriNetUnfolderBase]: 773/1272 cut-off events. [2023-11-17 15:06:27,043 INFO L125 PetriNetUnfolderBase]: For 884/894 co-relation queries the response was YES. [2023-11-17 15:06:27,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 1272 events. 773/1272 cut-off events. For 884/894 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6618 event pairs, 257 based on Foata normal form. 34/1115 useless extension candidates. Maximal degree in co-relation 1028. Up to 762 conditions per place. [2023-11-17 15:06:27,054 INFO L140 encePairwiseOnDemand]: 442/448 looper letters, 78 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2023-11-17 15:06:27,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 87 transitions, 442 flow [2023-11-17 15:06:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2023-11-17 15:06:27,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322916666666667 [2023-11-17 15:06:27,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2023-11-17 15:06:27,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2023-11-17 15:06:27,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:27,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2023-11-17 15:06:27,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:27,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:27,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:27,063 INFO L175 Difference]: Start difference. First operand has 49 places, 53 transitions, 163 flow. Second operand 3 states and 581 transitions. [2023-11-17 15:06:27,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 87 transitions, 442 flow [2023-11-17 15:06:27,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 87 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:06:27,069 INFO L231 Difference]: Finished difference. Result has 52 places, 58 transitions, 210 flow [2023-11-17 15:06:27,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=52, PETRI_TRANSITIONS=58} [2023-11-17 15:06:27,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2023-11-17 15:06:27,071 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 58 transitions, 210 flow [2023-11-17 15:06:27,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:27,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:27,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:06:27,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:06:27,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-17 15:06:27,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -393097018, now seen corresponding path program 1 times [2023-11-17 15:06:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:27,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099416634] [2023-11-17 15:06:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:27,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:27,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:27,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:27,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:27,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-17 15:06:27,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-17 15:06:27,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-17 15:06:27,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-17 15:06:27,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-17 15:06:27,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-17 15:06:27,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-17 15:06:27,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-17 15:06:27,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-17 15:06:27,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-17 15:06:27,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:06:27,140 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:06:27,141 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:27,141 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:06:27,200 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:27,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 307 transitions, 632 flow [2023-11-17 15:06:27,252 INFO L124 PetriNetUnfolderBase]: 40/344 cut-off events. [2023-11-17 15:06:27,254 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:06:27,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 344 events. 40/344 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1253 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 289. Up to 8 conditions per place. [2023-11-17 15:06:27,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 307 transitions, 632 flow [2023-11-17 15:06:27,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 307 transitions, 632 flow [2023-11-17 15:06:27,268 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:27,268 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 307 transitions, 632 flow [2023-11-17 15:06:27,269 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 307 transitions, 632 flow [2023-11-17 15:06:27,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 307 transitions, 632 flow [2023-11-17 15:06:27,317 INFO L124 PetriNetUnfolderBase]: 40/344 cut-off events. [2023-11-17 15:06:27,317 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:06:27,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 344 events. 40/344 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1253 event pairs, 0 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 289. Up to 8 conditions per place. [2023-11-17 15:06:27,343 INFO L119 LiptonReduction]: Number of co-enabled transitions 59064 [2023-11-17 15:06:45,105 INFO L134 LiptonReduction]: Checked pairs total: 75959 [2023-11-17 15:06:45,105 INFO L136 LiptonReduction]: Total number of compositions: 340 [2023-11-17 15:06:45,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:06:45,108 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;@1aebb92f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:06:45,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-17 15:06:45,111 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:06:45,111 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-17 15:06:45,111 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:06:45,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:45,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:45,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 15:06:45,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2125436737, now seen corresponding path program 1 times [2023-11-17 15:06:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:45,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039431685] [2023-11-17 15:06:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:45,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:45,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:45,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039431685] [2023-11-17 15:06:45,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039431685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:45,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:45,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:06:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138060324] [2023-11-17 15:06:45,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:06:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:06:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:06:45,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 647 [2023-11-17 15:06:45,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 238.75) internal successors, (955), 4 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:45,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 647 [2023-11-17 15:06:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:49,682 INFO L124 PetriNetUnfolderBase]: 33083/45091 cut-off events. [2023-11-17 15:06:49,682 INFO L125 PetriNetUnfolderBase]: For 2133/2133 co-relation queries the response was YES. [2023-11-17 15:06:49,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90675 conditions, 45091 events. 33083/45091 cut-off events. For 2133/2133 co-relation queries the response was YES. Maximal size of possible extension queue 1793. Compared 283217 event pairs, 16164 based on Foata normal form. 0/31568 useless extension candidates. Maximal degree in co-relation 13600. Up to 33162 conditions per place. [2023-11-17 15:06:50,025 INFO L140 encePairwiseOnDemand]: 627/647 looper letters, 171 selfloop transitions, 14 changer transitions 0/189 dead transitions. [2023-11-17 15:06:50,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 189 transitions, 797 flow [2023-11-17 15:06:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:06:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:06:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1403 transitions. [2023-11-17 15:06:50,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433693972179289 [2023-11-17 15:06:50,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1403 transitions. [2023-11-17 15:06:50,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1403 transitions. [2023-11-17 15:06:50,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:50,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1403 transitions. [2023-11-17 15:06:50,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:50,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 647.0) internal successors, (3882), 6 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:50,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 647.0) internal successors, (3882), 6 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:50,043 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 168 flow. Second operand 5 states and 1403 transitions. [2023-11-17 15:06:50,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 189 transitions, 797 flow [2023-11-17 15:06:50,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 189 transitions, 789 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-17 15:06:50,052 INFO L231 Difference]: Finished difference. Result has 67 places, 78 transitions, 243 flow [2023-11-17 15:06:50,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=67, PETRI_TRANSITIONS=78} [2023-11-17 15:06:50,055 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2023-11-17 15:06:50,055 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 78 transitions, 243 flow [2023-11-17 15:06:50,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.75) internal successors, (955), 4 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:50,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:50,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:50,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:06:50,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 15:06:50,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2065038254, now seen corresponding path program 1 times [2023-11-17 15:06:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102333259] [2023-11-17 15:06:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:50,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:50,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102333259] [2023-11-17 15:06:50,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102333259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:50,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:50,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:06:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820810182] [2023-11-17 15:06:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:50,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:06:50,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:06:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:06:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 647 [2023-11-17 15:06:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 647 [2023-11-17 15:06:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:52,274 INFO L124 PetriNetUnfolderBase]: 19061/26551 cut-off events. [2023-11-17 15:06:52,274 INFO L125 PetriNetUnfolderBase]: For 13867/13899 co-relation queries the response was YES. [2023-11-17 15:06:52,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67226 conditions, 26551 events. 19061/26551 cut-off events. For 13867/13899 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 162347 event pairs, 6120 based on Foata normal form. 255/23050 useless extension candidates. Maximal degree in co-relation 23676. Up to 20654 conditions per place. [2023-11-17 15:06:52,496 INFO L140 encePairwiseOnDemand]: 634/647 looper letters, 130 selfloop transitions, 8 changer transitions 0/143 dead transitions. [2023-11-17 15:06:52,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 143 transitions, 730 flow [2023-11-17 15:06:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:06:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:06:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 843 transitions. [2023-11-17 15:06:52,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43431221020092736 [2023-11-17 15:06:52,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 843 transitions. [2023-11-17 15:06:52,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 843 transitions. [2023-11-17 15:06:52,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:52,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 843 transitions. [2023-11-17 15:06:52,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.0) internal successors, (843), 3 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:52,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:52,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 647.0) internal successors, (2588), 4 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:52,507 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 243 flow. Second operand 3 states and 843 transitions. [2023-11-17 15:06:52,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 143 transitions, 730 flow [2023-11-17 15:06:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 722 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:06:52,533 INFO L231 Difference]: Finished difference. Result has 70 places, 85 transitions, 315 flow [2023-11-17 15:06:52,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=70, PETRI_TRANSITIONS=85} [2023-11-17 15:06:52,535 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2023-11-17 15:06:52,535 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 85 transitions, 315 flow [2023-11-17 15:06:52,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:52,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:52,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:06:52,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:06:52,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 15:06:52,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 80427518, now seen corresponding path program 1 times [2023-11-17 15:06:52,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:52,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771654849] [2023-11-17 15:06:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:06:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:06:52,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:06:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771654849] [2023-11-17 15:06:52,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771654849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:06:52,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:06:52,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:06:52,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060777630] [2023-11-17 15:06:52,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:06:52,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:06:52,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:06:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:06:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 15:06:52,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 647 [2023-11-17 15:06:52,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 85 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:52,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:06:52,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 647 [2023-11-17 15:06:52,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:06:55,845 INFO L124 PetriNetUnfolderBase]: 21104/29699 cut-off events. [2023-11-17 15:06:55,846 INFO L125 PetriNetUnfolderBase]: For 22587/22655 co-relation queries the response was YES. [2023-11-17 15:06:55,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79677 conditions, 29699 events. 21104/29699 cut-off events. For 22587/22655 co-relation queries the response was YES. Maximal size of possible extension queue 1417. Compared 190493 event pairs, 8043 based on Foata normal form. 851/27849 useless extension candidates. Maximal degree in co-relation 52354. Up to 15990 conditions per place. [2023-11-17 15:06:56,083 INFO L140 encePairwiseOnDemand]: 636/647 looper letters, 180 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2023-11-17 15:06:56,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 209 transitions, 1141 flow [2023-11-17 15:06:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:06:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:06:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1573 transitions. [2023-11-17 15:06:56,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052035033487893 [2023-11-17 15:06:56,091 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1573 transitions. [2023-11-17 15:06:56,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1573 transitions. [2023-11-17 15:06:56,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:06:56,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1573 transitions. [2023-11-17 15:06:56,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 262.1666666666667) internal successors, (1573), 6 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:56,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 647.0) internal successors, (4529), 7 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:56,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 647.0) internal successors, (4529), 7 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:56,102 INFO L175 Difference]: Start difference. First operand has 70 places, 85 transitions, 315 flow. Second operand 6 states and 1573 transitions. [2023-11-17 15:06:56,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 209 transitions, 1141 flow [2023-11-17 15:06:56,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 209 transitions, 1103 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:06:56,151 INFO L231 Difference]: Finished difference. Result has 76 places, 95 transitions, 461 flow [2023-11-17 15:06:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=647, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=461, PETRI_PLACES=76, PETRI_TRANSITIONS=95} [2023-11-17 15:06:56,153 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 14 predicate places. [2023-11-17 15:06:56,153 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 95 transitions, 461 flow [2023-11-17 15:06:56,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 233.33333333333334) internal successors, (1400), 6 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:06:56,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:06:56,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:06:56,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:06:56,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-17 15:06:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:06:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1411090514, now seen corresponding path program 1 times [2023-11-17 15:06:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:06:56,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526115197] [2023-11-17 15:06:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:06:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:06:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:56,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:06:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:06:56,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:06:56,195 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2023-11-17 15:06:56,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2023-11-17 15:06:56,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2023-11-17 15:06:56,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2023-11-17 15:06:56,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2023-11-17 15:06:56,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2023-11-17 15:06:56,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2023-11-17 15:06:56,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:06:56,197 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:06:56,198 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:06:56,198 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:06:56,246 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:06:56,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 400 transitions, 828 flow [2023-11-17 15:06:56,318 INFO L124 PetriNetUnfolderBase]: 53/450 cut-off events. [2023-11-17 15:06:56,318 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:56,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 450 events. 53/450 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1870 event pairs, 0 based on Foata normal form. 0/380 useless extension candidates. Maximal degree in co-relation 381. Up to 10 conditions per place. [2023-11-17 15:06:56,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 400 transitions, 828 flow [2023-11-17 15:06:56,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 400 transitions, 828 flow [2023-11-17 15:06:56,334 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:06:56,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 360 places, 400 transitions, 828 flow [2023-11-17 15:06:56,335 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 360 places, 400 transitions, 828 flow [2023-11-17 15:06:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 400 transitions, 828 flow [2023-11-17 15:06:56,519 INFO L124 PetriNetUnfolderBase]: 53/450 cut-off events. [2023-11-17 15:06:56,519 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:06:56,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 450 events. 53/450 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1870 event pairs, 0 based on Foata normal form. 0/380 useless extension candidates. Maximal degree in co-relation 381. Up to 10 conditions per place. [2023-11-17 15:06:56,552 INFO L119 LiptonReduction]: Number of co-enabled transitions 112976 [2023-11-17 15:07:12,593 INFO L134 LiptonReduction]: Checked pairs total: 147434 [2023-11-17 15:07:12,593 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-11-17 15:07:12,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:07:12,596 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;@1aebb92f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:07:12,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-17 15:07:12,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:07:12,598 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 15:07:12,598 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:07:12,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:07:12,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:07:12,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-17 15:07:12,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:07:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1715793518, now seen corresponding path program 1 times [2023-11-17 15:07:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:07:12,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331572268] [2023-11-17 15:07:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:07:12,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:07:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:07:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:07:12,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:07:12,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331572268] [2023-11-17 15:07:12,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331572268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:07:12,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:07:12,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:07:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644092843] [2023-11-17 15:07:12,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:07:12,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:07:12,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:07:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:07:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:07:12,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 847 [2023-11-17 15:07:12,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 312.0) internal successors, (1248), 4 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:07:12,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:07:12,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 847 [2023-11-17 15:07:12,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand