/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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:26,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:26,790 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 15:10:26,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:26,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:26,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:26,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:26,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:26,814 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:26,817 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:26,817 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:26,818 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:26,818 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:26,819 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:26,820 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:26,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:26,820 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:26,821 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:26,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:26,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:26,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:26,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:26,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:26,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:26,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:26,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:26,823 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:27,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:27,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:27,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:27,030 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:27,030 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:27,031 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-17 15:10:27,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:28,158 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:28,158 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-17 15:10:28,168 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fde7fcb/5c212c36b64548e2a0fabb997fc595e5/FLAGd94d0cc48 [2023-11-17 15:10:28,278 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fde7fcb/5c212c36b64548e2a0fabb997fc595e5 [2023-11-17 15:10:28,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:28,284 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:28,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:28,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:28,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:28,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462e06cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28, skipping insertion in model container [2023-11-17 15:10:28,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,327 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:28,495 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.i[30907,30920] [2023-11-17 15:10:28,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:28,514 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:28,558 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.i[30907,30920] [2023-11-17 15:10:28,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:28,585 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:28,585 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:28,590 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:28,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28 WrapperNode [2023-11-17 15:10:28,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:28,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:28,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:28,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:28,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,619 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,636 INFO L138 Inliner]: procedures = 173, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 86 [2023-11-17 15:10:28,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:28,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:28,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:28,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:28,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,656 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:28,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:28,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:28,662 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:28,662 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (1/1) ... [2023-11-17 15:10:28,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:28,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:28,691 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 15:10:28,704 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 15:10:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:10:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:28,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:10:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:10:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:28,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:28,721 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 15:10:28,829 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:28,830 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:28,946 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:29,011 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:29,012 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:10:29,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:29 BoogieIcfgContainer [2023-11-17 15:10:29,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:29,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:29,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:29,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:29,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:28" (1/3) ... [2023-11-17 15:10:29,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a67a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:29, skipping insertion in model container [2023-11-17 15:10:29,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:28" (2/3) ... [2023-11-17 15:10:29,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a67a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:29, skipping insertion in model container [2023-11-17 15:10:29,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:29" (3/3) ... [2023-11-17 15:10:29,018 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-11-17 15:10:29,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:29,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:29,030 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:29,068 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:29,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 71 transitions, 146 flow [2023-11-17 15:10:29,111 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-11-17 15:10:29,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:29,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-11-17 15:10:29,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 71 transitions, 146 flow [2023-11-17 15:10:29,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 71 transitions, 146 flow [2023-11-17 15:10:29,131 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:29,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 71 transitions, 146 flow [2023-11-17 15:10:29,140 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 71 transitions, 146 flow [2023-11-17 15:10:29,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 71 transitions, 146 flow [2023-11-17 15:10:29,172 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-11-17 15:10:29,172 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:29,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-11-17 15:10:29,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 1204 [2023-11-17 15:10:30,337 INFO L134 LiptonReduction]: Checked pairs total: 1342 [2023-11-17 15:10:30,337 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-11-17 15:10:30,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:30,362 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;@7955f1ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:30,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:30,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:30,367 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-11-17 15:10:30,367 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:30,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:30,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:10:30,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:30,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1162566977, now seen corresponding path program 1 times [2023-11-17 15:10:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843804982] [2023-11-17 15:10:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:30,534 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 15:10:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:30,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843804982] [2023-11-17 15:10:30,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843804982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:30,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:30,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:30,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077999307] [2023-11-17 15:10:30,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:30,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:30,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 135 [2023-11-17 15:10:30,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 38 flow. Second operand has 2 states, 2 states have (on average 60.5) internal successors, (121), 2 states have internal predecessors, (121), 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 15:10:30,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:30,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 135 [2023-11-17 15:10:30,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:30,594 INFO L124 PetriNetUnfolderBase]: 18/49 cut-off events. [2023-11-17 15:10:30,594 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:30,595 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. 0/46 useless extension candidates. Maximal degree in co-relation 87. Up to 47 conditions per place. [2023-11-17 15:10:30,596 INFO L140 encePairwiseOnDemand]: 132/135 looper letters, 12 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-11-17 15:10:30,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 14 transitions, 56 flow [2023-11-17 15:10:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 131 transitions. [2023-11-17 15:10:30,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2023-11-17 15:10:30,604 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 131 transitions. [2023-11-17 15:10:30,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 131 transitions. [2023-11-17 15:10:30,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:30,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 131 transitions. [2023-11-17 15:10:30,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 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 15:10:30,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 15:10:30,611 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 15:10:30,612 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 38 flow. Second operand 2 states and 131 transitions. [2023-11-17 15:10:30,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 14 transitions, 56 flow [2023-11-17 15:10:30,614 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 15:10:30,615 INFO L231 Difference]: Finished difference. Result has 17 places, 14 transitions, 32 flow [2023-11-17 15:10:30,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, 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 15:10:30,619 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2023-11-17 15:10:30,619 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 14 transitions, 32 flow [2023-11-17 15:10:30,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 60.5) internal successors, (121), 2 states have internal predecessors, (121), 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 15:10:30,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:30,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:30,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:30,620 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 15:10:30,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1162509102, now seen corresponding path program 1 times [2023-11-17 15:10:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686918680] [2023-11-17 15:10:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:30,638 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:30,660 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:30,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:30,662 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:30,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:30,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:30,664 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:30,666 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:30,666 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:30,684 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:30,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 240 flow [2023-11-17 15:10:30,701 INFO L124 PetriNetUnfolderBase]: 13/139 cut-off events. [2023-11-17 15:10:30,701 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:30,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 13/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2023-11-17 15:10:30,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 115 transitions, 240 flow [2023-11-17 15:10:30,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 240 flow [2023-11-17 15:10:30,703 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:30,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 115 transitions, 240 flow [2023-11-17 15:10:30,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 115 transitions, 240 flow [2023-11-17 15:10:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 240 flow [2023-11-17 15:10:30,716 INFO L124 PetriNetUnfolderBase]: 13/139 cut-off events. [2023-11-17 15:10:30,717 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:30,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 13/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2023-11-17 15:10:30,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 6192 [2023-11-17 15:10:31,934 INFO L134 LiptonReduction]: Checked pairs total: 19553 [2023-11-17 15:10:31,934 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-11-17 15:10:31,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:31,937 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;@7955f1ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:31,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:31,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:31,940 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2023-11-17 15:10:31,940 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:31,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:31,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:31,941 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 15:10:31,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash 442843608, now seen corresponding path program 1 times [2023-11-17 15:10:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:31,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048466196] [2023-11-17 15:10:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:32,032 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 15:10:32,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:32,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048466196] [2023-11-17 15:10:32,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048466196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:32,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:32,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:32,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744782831] [2023-11-17 15:10:32,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:32,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:32,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:32,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:32,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 212 [2023-11-17 15:10:32,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 15:10:32,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:32,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 212 [2023-11-17 15:10:32,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:32,207 INFO L124 PetriNetUnfolderBase]: 413/810 cut-off events. [2023-11-17 15:10:32,207 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-17 15:10:32,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 810 events. 413/810 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4286 event pairs, 333 based on Foata normal form. 24/753 useless extension candidates. Maximal degree in co-relation 1161. Up to 642 conditions per place. [2023-11-17 15:10:32,215 INFO L140 encePairwiseOnDemand]: 206/212 looper letters, 36 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-11-17 15:10:32,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 193 flow [2023-11-17 15:10:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-17 15:10:32,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2023-11-17 15:10:32,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-17 15:10:32,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-17 15:10:32,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:32,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-17 15:10:32,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 15:10:32,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 15:10:32,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 15:10:32,227 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 100 flow. Second operand 3 states and 303 transitions. [2023-11-17 15:10:32,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 193 flow [2023-11-17 15:10:32,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:32,229 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 92 flow [2023-11-17 15:10:32,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 15:10:32,230 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-11-17 15:10:32,230 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 92 flow [2023-11-17 15:10:32,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 15:10:32,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:32,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:32,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:32,231 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 15:10:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1377317970, now seen corresponding path program 1 times [2023-11-17 15:10:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:32,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697673511] [2023-11-17 15:10:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:32,261 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:32,273 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:32,275 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:32,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:32,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:32,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:32,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:32,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:32,276 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:32,277 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:32,277 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:32,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:32,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 159 transitions, 336 flow [2023-11-17 15:10:32,320 INFO L124 PetriNetUnfolderBase]: 19/196 cut-off events. [2023-11-17 15:10:32,321 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:32,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 19/196 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 563 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-11-17 15:10:32,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 159 transitions, 336 flow [2023-11-17 15:10:32,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 159 transitions, 336 flow [2023-11-17 15:10:32,323 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:32,323 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 159 transitions, 336 flow [2023-11-17 15:10:32,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 159 transitions, 336 flow [2023-11-17 15:10:32,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 159 transitions, 336 flow [2023-11-17 15:10:32,338 INFO L124 PetriNetUnfolderBase]: 19/196 cut-off events. [2023-11-17 15:10:32,338 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:32,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 19/196 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 563 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-11-17 15:10:32,344 INFO L119 LiptonReduction]: Number of co-enabled transitions 14964 [2023-11-17 15:10:33,808 INFO L134 LiptonReduction]: Checked pairs total: 49145 [2023-11-17 15:10:33,809 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-17 15:10:33,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:33,813 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;@7955f1ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:33,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:33,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:33,815 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:10:33,815 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:33,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:33,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:10:33,819 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 15:10:33,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1030735411, now seen corresponding path program 1 times [2023-11-17 15:10:33,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:33,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073317749] [2023-11-17 15:10:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:33,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:33,851 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 15:10:33,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:33,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073317749] [2023-11-17 15:10:33,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073317749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:33,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:33,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207944637] [2023-11-17 15:10:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:33,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:33,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:33,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2023-11-17 15:10:33,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 146 flow. Second operand has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 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 15:10:33,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:33,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2023-11-17 15:10:33,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:34,829 INFO L124 PetriNetUnfolderBase]: 9336/13879 cut-off events. [2023-11-17 15:10:34,829 INFO L125 PetriNetUnfolderBase]: For 871/871 co-relation queries the response was YES. [2023-11-17 15:10:34,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27486 conditions, 13879 events. 9336/13879 cut-off events. For 871/871 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 87478 event pairs, 8162 based on Foata normal form. 0/12505 useless extension candidates. Maximal degree in co-relation 11954. Up to 13037 conditions per place. [2023-11-17 15:10:34,904 INFO L140 encePairwiseOnDemand]: 289/295 looper letters, 39 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2023-11-17 15:10:34,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 212 flow [2023-11-17 15:10:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2023-11-17 15:10:34,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966101694915254 [2023-11-17 15:10:34,905 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2023-11-17 15:10:34,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2023-11-17 15:10:34,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:34,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2023-11-17 15:10:34,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 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 15:10:34,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 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 15:10:34,908 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 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 15:10:34,908 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 146 flow. Second operand 2 states and 293 transitions. [2023-11-17 15:10:34,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 212 flow [2023-11-17 15:10:34,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 58 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:34,910 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 132 flow [2023-11-17 15:10:34,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=132, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-11-17 15:10:34,911 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-17 15:10:34,911 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 132 flow [2023-11-17 15:10:34,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 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 15:10:34,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:34,911 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:34,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:34,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 485770729, now seen corresponding path program 1 times [2023-11-17 15:10:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946801411] [2023-11-17 15:10:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:34,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:34,919 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:34,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:34,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:34,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:34,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:34,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:34,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:34,934 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:34,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:10:34,934 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:34,935 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:34,935 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:34,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:34,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 203 transitions, 434 flow [2023-11-17 15:10:34,987 INFO L124 PetriNetUnfolderBase]: 25/253 cut-off events. [2023-11-17 15:10:34,987 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:34,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 253 events. 25/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 808 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-11-17 15:10:34,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 203 transitions, 434 flow [2023-11-17 15:10:34,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 203 transitions, 434 flow [2023-11-17 15:10:34,991 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:34,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 203 transitions, 434 flow [2023-11-17 15:10:34,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 203 transitions, 434 flow [2023-11-17 15:10:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 203 transitions, 434 flow [2023-11-17 15:10:35,011 INFO L124 PetriNetUnfolderBase]: 25/253 cut-off events. [2023-11-17 15:10:35,011 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:35,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 253 events. 25/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 808 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-11-17 15:10:35,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 27520 [2023-11-17 15:10:37,045 INFO L134 LiptonReduction]: Checked pairs total: 93148 [2023-11-17 15:10:37,045 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-11-17 15:10:37,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:37,048 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;@7955f1ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:37,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:37,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:37,050 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 15:10:37,050 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:10:37,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:37,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:10:37,050 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 15:10:37,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1470513168, now seen corresponding path program 1 times [2023-11-17 15:10:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944522578] [2023-11-17 15:10:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:37,066 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 15:10:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944522578] [2023-11-17 15:10:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944522578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:37,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:37,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780725028] [2023-11-17 15:10:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:10:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:10:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:10:37,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 385 [2023-11-17 15:10:37,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 192 flow. Second operand has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 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 15:10:37,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:37,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 385 [2023-11-17 15:10:37,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:48,979 INFO L124 PetriNetUnfolderBase]: 129492/176441 cut-off events. [2023-11-17 15:10:48,980 INFO L125 PetriNetUnfolderBase]: For 17353/17353 co-relation queries the response was YES. [2023-11-17 15:10:49,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352013 conditions, 176441 events. 129492/176441 cut-off events. For 17353/17353 co-relation queries the response was YES. Maximal size of possible extension queue 3979. Compared 1250652 event pairs, 116576 based on Foata normal form. 0/161027 useless extension candidates. Maximal degree in co-relation 64246. Up to 167105 conditions per place. [2023-11-17 15:10:50,129 INFO L140 encePairwiseOnDemand]: 376/385 looper letters, 48 selfloop transitions, 0 changer transitions 0/73 dead transitions. [2023-11-17 15:10:50,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 270 flow [2023-11-17 15:10:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:10:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:10:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 371 transitions. [2023-11-17 15:10:50,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2023-11-17 15:10:50,131 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 371 transitions. [2023-11-17 15:10:50,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 371 transitions. [2023-11-17 15:10:50,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:50,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 371 transitions. [2023-11-17 15:10:50,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 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 15:10:50,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 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 15:10:50,133 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 385.0) internal successors, (1155), 3 states have internal predecessors, (1155), 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 15:10:50,133 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 192 flow. Second operand 2 states and 371 transitions. [2023-11-17 15:10:50,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 270 flow [2023-11-17 15:10:50,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 264 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:50,146 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 168 flow [2023-11-17 15:10:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=168, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2023-11-17 15:10:50,148 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -4 predicate places. [2023-11-17 15:10:50,148 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 168 flow [2023-11-17 15:10:50,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 159.5) internal successors, (319), 2 states have internal predecessors, (319), 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 15:10:50,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:50,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:50,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:10:50,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:50,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash 266239022, now seen corresponding path program 1 times [2023-11-17 15:10:50,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:50,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830404549] [2023-11-17 15:10:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:50,370 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 15:10:50,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:50,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830404549] [2023-11-17 15:10:50,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830404549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:50,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:50,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:10:50,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526604417] [2023-11-17 15:10:50,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:50,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 15:10:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 15:10:50,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 15:10:50,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 385 [2023-11-17 15:10:50,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 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 15:10:50,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:50,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 385 [2023-11-17 15:10:50,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand