/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/37_stack_lock_p0_vs_concur-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:18,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:18,162 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 15:10:18,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:18,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:18,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:18,207 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:18,208 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:18,208 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:18,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:18,211 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:18,211 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:18,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:18,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:18,212 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:18,212 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:18,212 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:18,213 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:18,213 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:18,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:18,213 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:18,214 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:18,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:18,215 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:18,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:18,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:18,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:18,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:18,216 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:18,216 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:18,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:18,217 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:18,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:18,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:18,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:18,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:18,486 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:18,487 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:18,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-17 15:10:19,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:19,926 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:19,927 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-17 15:10:19,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb593c56e/5997f1f811c949e9bf48af287ac1a821/FLAGd623e2d79 [2023-11-17 15:10:19,967 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb593c56e/5997f1f811c949e9bf48af287ac1a821 [2023-11-17 15:10:19,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:19,971 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:19,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:19,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:19,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:19,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:19" (1/1) ... [2023-11-17 15:10:19,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9814d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:19, skipping insertion in model container [2023-11-17 15:10:19,981 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:19" (1/1) ... [2023-11-17 15:10:20,048 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:20,342 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/37_stack_lock_p0_vs_concur-pthread.i[31028,31041] [2023-11-17 15:10:20,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:20,373 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:20,431 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/37_stack_lock_p0_vs_concur-pthread.i[31028,31041] [2023-11-17 15:10:20,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:20,474 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:20,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20 WrapperNode [2023-11-17 15:10:20,477 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:20,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:20,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:20,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:20,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,501 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,521 INFO L138 Inliner]: procedures = 165, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2023-11-17 15:10:20,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:20,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:20,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:20,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:20,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,549 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:20,550 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:20,550 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:20,550 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:20,551 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (1/1) ... [2023-11-17 15:10:20,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:20,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:20,581 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 15:10:20,596 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 15:10:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:10:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:20,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:20,622 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:10:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:20,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:10:20,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:20,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:20,625 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 15:10:20,788 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:20,789 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:21,015 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:21,085 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:21,085 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:10:21,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:21 BoogieIcfgContainer [2023-11-17 15:10:21,087 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:21,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:21,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:21,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:21,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:19" (1/3) ... [2023-11-17 15:10:21,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442669a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:21, skipping insertion in model container [2023-11-17 15:10:21,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:20" (2/3) ... [2023-11-17 15:10:21,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@442669a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:21, skipping insertion in model container [2023-11-17 15:10:21,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:21" (3/3) ... [2023-11-17 15:10:21,114 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur-pthread.i [2023-11-17 15:10:21,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:21,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:21,130 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:21,201 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:21,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-17 15:10:21,297 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-17 15:10:21,298 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:21,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 62. Up to 4 conditions per place. [2023-11-17 15:10:21,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 170 flow [2023-11-17 15:10:21,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 170 flow [2023-11-17 15:10:21,315 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:21,331 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-17 15:10:21,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-17 15:10:21,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-17 15:10:21,373 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-17 15:10:21,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:21,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 62. Up to 4 conditions per place. [2023-11-17 15:10:21,378 INFO L119 LiptonReduction]: Number of co-enabled transitions 1372 [2023-11-17 15:10:23,363 INFO L134 LiptonReduction]: Checked pairs total: 1571 [2023-11-17 15:10:23,363 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-11-17 15:10:23,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:23,384 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;@b47c8bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:23,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:23,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:23,388 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 15:10:23,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:23,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:23,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:10:23,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:23,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1580804225, now seen corresponding path program 1 times [2023-11-17 15:10:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963572368] [2023-11-17 15:10:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:23,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:23,560 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 15:10:23,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:23,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963572368] [2023-11-17 15:10:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963572368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:23,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:23,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036189009] [2023-11-17 15:10:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:23,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:23,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2023-11-17 15:10:23,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 38 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 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 15:10:23,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:23,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2023-11-17 15:10:23,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:23,642 INFO L124 PetriNetUnfolderBase]: 18/49 cut-off events. [2023-11-17 15:10:23,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:23,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 49 events. 18/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 15 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 87. Up to 47 conditions per place. [2023-11-17 15:10:23,644 INFO L140 encePairwiseOnDemand]: 156/159 looper letters, 12 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-11-17 15:10:23,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 14 transitions, 56 flow [2023-11-17 15:10:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 159 transitions. [2023-11-17 15:10:23,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 15:10:23,660 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 159 transitions. [2023-11-17 15:10:23,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 159 transitions. [2023-11-17 15:10:23,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:23,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 159 transitions. [2023-11-17 15:10:23,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 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 15:10:23,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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 15:10:23,674 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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 15:10:23,675 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 38 flow. Second operand 2 states and 159 transitions. [2023-11-17 15:10:23,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 14 transitions, 56 flow [2023-11-17 15:10:23,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:23,679 INFO L231 Difference]: Finished difference. Result has 17 places, 14 transitions, 32 flow [2023-11-17 15:10:23,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=14} [2023-11-17 15:10:23,685 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-11-17 15:10:23,686 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 14 transitions, 32 flow [2023-11-17 15:10:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 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 15:10:23,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:23,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:23,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:23,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1580744574, now seen corresponding path program 1 times [2023-11-17 15:10:23,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:23,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102910128] [2023-11-17 15:10:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:23,715 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:23,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:23,742 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:23,743 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:23,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:23,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:23,745 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:23,747 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:23,747 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:23,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 133 transitions, 276 flow [2023-11-17 15:10:23,833 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-11-17 15:10:23,833 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:23,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 349 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-11-17 15:10:23,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 133 transitions, 276 flow [2023-11-17 15:10:23,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 133 transitions, 276 flow [2023-11-17 15:10:23,841 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:23,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 133 transitions, 276 flow [2023-11-17 15:10:23,844 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 133 transitions, 276 flow [2023-11-17 15:10:23,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 133 transitions, 276 flow [2023-11-17 15:10:23,879 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-11-17 15:10:23,880 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:23,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 349 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-11-17 15:10:23,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 7644 [2023-11-17 15:10:26,036 INFO L134 LiptonReduction]: Checked pairs total: 21441 [2023-11-17 15:10:26,037 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-17 15:10:26,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:26,040 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;@b47c8bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:26,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:26,043 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:26,043 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:10:26,043 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:26,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:26,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:10:26,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:26,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1389345490, now seen corresponding path program 1 times [2023-11-17 15:10:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:26,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096617633] [2023-11-17 15:10:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:26,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:26,079 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 15:10:26,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:26,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096617633] [2023-11-17 15:10:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096617633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:26,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:26,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:26,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367468186] [2023-11-17 15:10:26,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:26,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:26,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:26,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 258 [2023-11-17 15:10:26,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 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 15:10:26,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:26,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 258 [2023-11-17 15:10:26,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:26,246 INFO L124 PetriNetUnfolderBase]: 486/935 cut-off events. [2023-11-17 15:10:26,247 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-17 15:10:26,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 935 events. 486/935 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4952 event pairs, 434 based on Foata normal form. 0/873 useless extension candidates. Maximal degree in co-relation 1371. Up to 821 conditions per place. [2023-11-17 15:10:26,254 INFO L140 encePairwiseOnDemand]: 253/258 looper letters, 27 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2023-11-17 15:10:26,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 146 flow [2023-11-17 15:10:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 258 transitions. [2023-11-17 15:10:26,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 15:10:26,257 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 258 transitions. [2023-11-17 15:10:26,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 258 transitions. [2023-11-17 15:10:26,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:26,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 258 transitions. [2023-11-17 15:10:26,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 129.0) internal successors, (258), 2 states have internal predecessors, (258), 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 15:10:26,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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 15:10:26,260 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 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 15:10:26,260 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 102 flow. Second operand 2 states and 258 transitions. [2023-11-17 15:10:26,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 146 flow [2023-11-17 15:10:26,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:26,262 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-11-17 15:10:26,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-11-17 15:10:26,263 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-17 15:10:26,263 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-11-17 15:10:26,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 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 15:10:26,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:26,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:26,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:26,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:26,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:26,265 INFO L85 PathProgramCache]: Analyzing trace with hash 71650895, now seen corresponding path program 1 times [2023-11-17 15:10:26,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:26,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769516442] [2023-11-17 15:10:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:26,284 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:26,310 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:26,311 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:26,311 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:26,311 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:26,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:26,312 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:26,312 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:26,313 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:26,313 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:26,349 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:26,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 183 transitions, 384 flow [2023-11-17 15:10:26,384 INFO L124 PetriNetUnfolderBase]: 19/220 cut-off events. [2023-11-17 15:10:26,384 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:26,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 220 events. 19/220 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-11-17 15:10:26,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 183 transitions, 384 flow [2023-11-17 15:10:26,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 183 transitions, 384 flow [2023-11-17 15:10:26,388 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:26,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 183 transitions, 384 flow [2023-11-17 15:10:26,388 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 183 transitions, 384 flow [2023-11-17 15:10:26,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 183 transitions, 384 flow [2023-11-17 15:10:26,413 INFO L124 PetriNetUnfolderBase]: 19/220 cut-off events. [2023-11-17 15:10:26,413 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:26,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 220 events. 19/220 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-11-17 15:10:26,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 18816 [2023-11-17 15:10:28,818 INFO L134 LiptonReduction]: Checked pairs total: 56308 [2023-11-17 15:10:28,819 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-11-17 15:10:28,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:28,822 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;@b47c8bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:28,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:28,826 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:28,826 INFO L124 PetriNetUnfolderBase]: 2/29 cut-off events. [2023-11-17 15:10:28,826 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:10:28,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:28,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:28,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:28,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash -816464927, now seen corresponding path program 1 times [2023-11-17 15:10:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:28,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851931746] [2023-11-17 15:10:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851931746] [2023-11-17 15:10:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851931746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:28,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765454492] [2023-11-17 15:10:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:28,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 345 [2023-11-17 15:10:28,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 157.0) internal successors, (314), 2 states have internal predecessors, (314), 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 15:10:28,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:28,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 345 [2023-11-17 15:10:28,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:30,667 INFO L124 PetriNetUnfolderBase]: 11916/18100 cut-off events. [2023-11-17 15:10:30,667 INFO L125 PetriNetUnfolderBase]: For 1213/1213 co-relation queries the response was YES. [2023-11-17 15:10:30,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35521 conditions, 18100 events. 11916/18100 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 121933 event pairs, 10511 based on Foata normal form. 0/16538 useless extension candidates. Maximal degree in co-relation 9524. Up to 16645 conditions per place. [2023-11-17 15:10:30,888 INFO L140 encePairwiseOnDemand]: 339/345 looper letters, 42 selfloop transitions, 0 changer transitions 0/61 dead transitions. [2023-11-17 15:10:30,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 224 flow [2023-11-17 15:10:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2023-11-17 15:10:30,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159420289855072 [2023-11-17 15:10:30,892 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2023-11-17 15:10:30,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2023-11-17 15:10:30,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:30,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2023-11-17 15:10:30,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 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 15:10:30,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 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 15:10:30,897 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 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 15:10:30,897 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 2 states and 356 transitions. [2023-11-17 15:10:30,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 224 flow [2023-11-17 15:10:30,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 61 transitions, 222 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:30,902 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 138 flow [2023-11-17 15:10:30,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-17 15:10:30,907 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-11-17 15:10:30,912 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 138 flow [2023-11-17 15:10:30,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 157.0) internal successors, (314), 2 states have internal predecessors, (314), 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 15:10:30,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:30,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:30,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:30,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:30,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash 278727718, now seen corresponding path program 1 times [2023-11-17 15:10:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:30,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68149502] [2023-11-17 15:10:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:30,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:31,029 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 15:10:31,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:31,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68149502] [2023-11-17 15:10:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68149502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:31,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:31,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:31,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684872166] [2023-11-17 15:10:31,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:31,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 345 [2023-11-17 15:10:31,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 15:10:31,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:31,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 345 [2023-11-17 15:10:31,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:32,648 INFO L124 PetriNetUnfolderBase]: 11612/17471 cut-off events. [2023-11-17 15:10:32,648 INFO L125 PetriNetUnfolderBase]: For 634/634 co-relation queries the response was YES. [2023-11-17 15:10:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34419 conditions, 17471 events. 11612/17471 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 116403 event pairs, 9766 based on Foata normal form. 340/16269 useless extension candidates. Maximal degree in co-relation 34413. Up to 15183 conditions per place. [2023-11-17 15:10:32,785 INFO L140 encePairwiseOnDemand]: 343/345 looper letters, 66 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-17 15:10:32,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 332 flow [2023-11-17 15:10:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-11-17 15:10:32,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975845410628019 [2023-11-17 15:10:32,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-11-17 15:10:32,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-11-17 15:10:32,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:32,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-11-17 15:10:32,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 15:10:32,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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 15:10:32,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 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 15:10:32,791 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 138 flow. Second operand 3 states and 515 transitions. [2023-11-17 15:10:32,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 332 flow [2023-11-17 15:10:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:32,795 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 138 flow [2023-11-17 15:10:32,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=345, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-11-17 15:10:32,799 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2023-11-17 15:10:32,799 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 138 flow [2023-11-17 15:10:32,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 15:10:32,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:32,799 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:32,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:10:32,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:32,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 770879086, now seen corresponding path program 1 times [2023-11-17 15:10:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:32,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382417049] [2023-11-17 15:10:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:32,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:32,829 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:32,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:32,855 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:32,855 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:32,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:32,855 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:32,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:32,856 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:10:32,856 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:10:32,857 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:32,857 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:32,895 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:32,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 233 transitions, 494 flow [2023-11-17 15:10:33,019 INFO L124 PetriNetUnfolderBase]: 25/283 cut-off events. [2023-11-17 15:10:33,019 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:33,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 283 events. 25/283 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 939 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 228. Up to 10 conditions per place. [2023-11-17 15:10:33,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 233 transitions, 494 flow [2023-11-17 15:10:33,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 233 transitions, 494 flow [2023-11-17 15:10:33,024 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:33,025 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 233 transitions, 494 flow [2023-11-17 15:10:33,025 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 233 transitions, 494 flow [2023-11-17 15:10:33,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 233 transitions, 494 flow [2023-11-17 15:10:33,060 INFO L124 PetriNetUnfolderBase]: 25/283 cut-off events. [2023-11-17 15:10:33,061 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:33,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 283 events. 25/283 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 939 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 228. Up to 10 conditions per place. [2023-11-17 15:10:33,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 34888 [2023-11-17 15:10:36,500 INFO L134 LiptonReduction]: Checked pairs total: 108987 [2023-11-17 15:10:36,500 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-11-17 15:10:36,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:36,507 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;@b47c8bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:36,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:36,508 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:36,509 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-11-17 15:10:36,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:36,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:36,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:10:36,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:36,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash -743999260, now seen corresponding path program 1 times [2023-11-17 15:10:36,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:36,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804906359] [2023-11-17 15:10:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:36,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:36,527 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 15:10:36,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:36,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804906359] [2023-11-17 15:10:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804906359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:36,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:36,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:36,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400731071] [2023-11-17 15:10:36,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:36,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:36,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 454 [2023-11-17 15:10:36,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 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 15:10:36,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:36,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 454 [2023-11-17 15:10:36,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:59,053 INFO L124 PetriNetUnfolderBase]: 210906/283898 cut-off events. [2023-11-17 15:10:59,053 INFO L125 PetriNetUnfolderBase]: For 22222/22222 co-relation queries the response was YES. [2023-11-17 15:10:59,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566689 conditions, 283898 events. 210906/283898 cut-off events. For 22222/22222 co-relation queries the response was YES. Maximal size of possible extension queue 5646. Compared 2048030 event pairs, 192366 based on Foata normal form. 0/263584 useless extension candidates. Maximal degree in co-relation 102434. Up to 271929 conditions per place. [2023-11-17 15:11:01,149 INFO L140 encePairwiseOnDemand]: 445/454 looper letters, 54 selfloop transitions, 0 changer transitions 0/77 dead transitions. [2023-11-17 15:11:01,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 290 flow [2023-11-17 15:11:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:11:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:11:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 453 transitions. [2023-11-17 15:11:01,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4988986784140969 [2023-11-17 15:11:01,154 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 453 transitions. [2023-11-17 15:11:01,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 453 transitions. [2023-11-17 15:11:01,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:11:01,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 453 transitions. [2023-11-17 15:11:01,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.5) internal successors, (453), 2 states have internal predecessors, (453), 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 15:11:01,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 454.0) internal successors, (1362), 3 states have internal predecessors, (1362), 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 15:11:01,157 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 454.0) internal successors, (1362), 3 states have internal predecessors, (1362), 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 15:11:01,158 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 200 flow. Second operand 2 states and 453 transitions. [2023-11-17 15:11:01,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 290 flow [2023-11-17 15:11:01,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 284 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 15:11:01,174 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 176 flow [2023-11-17 15:11:01,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=176, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-11-17 15:11:01,177 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -4 predicate places. [2023-11-17 15:11:01,177 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 176 flow [2023-11-17 15:11:01,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 197.5) internal successors, (395), 2 states have internal predecessors, (395), 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 15:11:01,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:01,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:11:01,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:11:01,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:11:01,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1784377573, now seen corresponding path program 1 times [2023-11-17 15:11:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930931282] [2023-11-17 15:11:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:01,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:01,203 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:11:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:11:01,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:11:01,231 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:11:01,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:11:01,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:11:01,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:11:01,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:11:01,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:11:01,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:11:01,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:11:01,232 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:11:01,233 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:11:01,233 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:11:01,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:11:01,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 283 transitions, 606 flow [2023-11-17 15:11:01,320 INFO L124 PetriNetUnfolderBase]: 31/346 cut-off events. [2023-11-17 15:11:01,320 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:01,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 346 events. 31/346 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1236 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 296. Up to 12 conditions per place. [2023-11-17 15:11:01,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 283 transitions, 606 flow [2023-11-17 15:11:01,328 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 283 transitions, 606 flow [2023-11-17 15:11:01,328 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:11:01,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 283 transitions, 606 flow [2023-11-17 15:11:01,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 283 transitions, 606 flow [2023-11-17 15:11:01,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 283 transitions, 606 flow [2023-11-17 15:11:01,375 INFO L124 PetriNetUnfolderBase]: 31/346 cut-off events. [2023-11-17 15:11:01,375 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:11:01,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 346 events. 31/346 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1236 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 296. Up to 12 conditions per place. [2023-11-17 15:11:01,394 INFO L119 LiptonReduction]: Number of co-enabled transitions 55860 [2023-11-17 15:11:04,907 INFO L134 LiptonReduction]: Checked pairs total: 174051 [2023-11-17 15:11:04,907 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-11-17 15:11:04,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:04,914 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;@b47c8bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:04,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:11:04,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:04,916 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-11-17 15:11:04,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:04,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:11:04,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:11:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -771929632, now seen corresponding path program 1 times [2023-11-17 15:11:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407465043] [2023-11-17 15:11:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:11:04,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:04,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407465043] [2023-11-17 15:11:04,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407465043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:04,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:04,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:11:04,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126923160] [2023-11-17 15:11:04,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:04,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:11:04,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:11:04,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:11:04,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 527 [2023-11-17 15:11:04,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 110 transitions, 260 flow. Second operand has 2 states, 2 states have (on average 238.5) internal successors, (477), 2 states have internal predecessors, (477), 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 15:11:04,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:04,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 527 [2023-11-17 15:11:04,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand