/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/fib_unsafe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 14:56:16,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 14:56:16,564 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 14:56:16,584 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 14:56:16,585 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 14:56:16,585 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 14:56:16,586 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 14:56:16,586 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 14:56:16,586 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 14:56:16,589 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 14:56:16,590 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 14:56:16,590 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 14:56:16,590 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 14:56:16,591 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 14:56:16,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 14:56:16,591 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 14:56:16,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 14:56:16,592 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 14:56:16,592 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 14:56:16,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 14:56:16,593 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 14:56:16,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 14:56:16,593 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 14:56:16,594 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 14:56:16,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 14:56:16,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 14:56:16,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 14:56:16,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 14:56:16,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 14:56:16,595 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 14:56:16,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 14:56:16,596 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 14:56:16,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 14:56:16,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 14:56:16,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 14:56:16,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 14:56:16,805 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 14:56:16,805 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 14:56:16,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2023-11-17 14:56:17,955 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 14:56:18,128 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 14:56:18,128 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2023-11-17 14:56:18,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b5ae81e/3589c9bf01fa4b0abaee7e208e93858b/FLAGb2db2fbb3 [2023-11-17 14:56:18,148 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b5ae81e/3589c9bf01fa4b0abaee7e208e93858b [2023-11-17 14:56:18,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 14:56:18,151 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 14:56:18,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 14:56:18,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 14:56:18,155 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 14:56:18,155 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,156 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e79346a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18, skipping insertion in model container [2023-11-17 14:56:18,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,198 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 14:56:18,430 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/fib_unsafe-5.i[30243,30256] [2023-11-17 14:56:18,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 14:56:18,454 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 14:56:18,487 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/fib_unsafe-5.i[30243,30256] [2023-11-17 14:56:18,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 14:56:18,520 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 14:56:18,520 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 14:56:18,525 INFO L206 MainTranslator]: Completed translation [2023-11-17 14:56:18,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18 WrapperNode [2023-11-17 14:56:18,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 14:56:18,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 14:56:18,528 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 14:56:18,528 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 14:56:18,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,552 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,568 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-17 14:56:18,568 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 14:56:18,569 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 14:56:18,569 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 14:56:18,569 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 14:56:18,576 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,581 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 14:56:18,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 14:56:18,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 14:56:18,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 14:56:18,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (1/1) ... [2023-11-17 14:56:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 14:56:18,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 14:56:18,642 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 14:56:18,675 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 14:56:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 14:56:18,680 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 14:56:18,680 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 14:56:18,680 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 14:56:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 14:56:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 14:56:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 14:56:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 14:56:18,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 14:56:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 14:56:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 14:56:18,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 14:56:18,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 14:56:18,683 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 14:56:18,816 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 14:56:18,818 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 14:56:19,075 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 14:56:19,081 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 14:56:19,082 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 14:56:19,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 02:56:19 BoogieIcfgContainer [2023-11-17 14:56:19,084 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 14:56:19,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 14:56:19,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 14:56:19,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 14:56:19,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 02:56:18" (1/3) ... [2023-11-17 14:56:19,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dbe4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 02:56:19, skipping insertion in model container [2023-11-17 14:56:19,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 02:56:18" (2/3) ... [2023-11-17 14:56:19,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dbe4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 02:56:19, skipping insertion in model container [2023-11-17 14:56:19,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 02:56:19" (3/3) ... [2023-11-17 14:56:19,103 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2023-11-17 14:56:19,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 14:56:19,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 14:56:19,115 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 14:56:19,204 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 14:56:19,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 97 transitions, 202 flow [2023-11-17 14:56:19,331 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-17 14:56:19,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 14:56:19,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-17 14:56:19,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 97 transitions, 202 flow [2023-11-17 14:56:19,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 196 flow [2023-11-17 14:56:19,344 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 14:56:19,371 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-17 14:56:19,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-17 14:56:19,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 196 flow [2023-11-17 14:56:19,411 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-17 14:56:19,412 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 14:56:19,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-17 14:56:19,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2023-11-17 14:56:22,360 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2023-11-17 14:56:22,360 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-17 14:56:22,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 14:56:22,382 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;@5824be9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 14:56:22,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 14:56:22,385 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 14:56:22,385 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-17 14:56:22,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 14:56:22,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 14:56:22,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 14:56:22,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 14:56:22,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 14:56:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1878456515, now seen corresponding path program 1 times [2023-11-17 14:56:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 14:56:22,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881398267] [2023-11-17 14:56:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:22,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 14:56:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:22,552 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 14:56:22,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 14:56:22,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881398267] [2023-11-17 14:56:22,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881398267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 14:56:22,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 14:56:22,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 14:56:22,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366462442] [2023-11-17 14:56:22,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 14:56:22,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 14:56:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 14:56:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 14:56:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 14:56:22,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2023-11-17 14:56:22,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 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 14:56:22,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 14:56:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2023-11-17 14:56:22,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 14:56:22,615 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-17 14:56:22,616 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 14:56:22,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2023-11-17 14:56:22,617 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-17 14:56:22,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-17 14:56:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 14:56:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 14:56:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-11-17 14:56:22,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774305555555556 [2023-11-17 14:56:22,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-11-17 14:56:22,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-11-17 14:56:22,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 14:56:22,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-11-17 14:56:22,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 14:56:22,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 14:56:22,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 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 14:56:22,635 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 275 transitions. [2023-11-17 14:56:22,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-17 14:56:22,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 14:56:22,638 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-17 14:56:22,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-17 14:56:22,641 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-17 14:56:22,641 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-17 14:56:22,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 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 14:56:22,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 14:56:22,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 14:56:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 14:56:22,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 14:56:22,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 14:56:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1897390208, now seen corresponding path program 1 times [2023-11-17 14:56:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 14:56:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469219561] [2023-11-17 14:56:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 14:56:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 14:56:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469219561] [2023-11-17 14:56:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469219561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 14:56:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437354006] [2023-11-17 14:56:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 14:56:22,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 14:56:22,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 14:56:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:22,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 14:56:22,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 14:56:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:22,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 14:56:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:22,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437354006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 14:56:22,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 14:56:22,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 14:56:22,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760917942] [2023-11-17 14:56:22,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 14:56:22,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 14:56:22,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 14:56:22,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 14:56:22,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 14:56:22,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2023-11-17 14:56:22,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 85.71428571428571) internal successors, (600), 7 states have internal predecessors, (600), 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 14:56:22,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 14:56:22,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2023-11-17 14:56:22,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 14:56:22,946 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-17 14:56:22,946 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 14:56:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2023-11-17 14:56:22,948 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-17 14:56:22,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-17 14:56:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 14:56:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 14:56:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 548 transitions. [2023-11-17 14:56:22,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756944444444444 [2023-11-17 14:56:22,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 548 transitions. [2023-11-17 14:56:22,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 548 transitions. [2023-11-17 14:56:22,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 14:56:22,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 548 transitions. [2023-11-17 14:56:22,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 states have internal predecessors, (548), 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 14:56:22,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 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 14:56:22,955 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 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 14:56:22,955 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 548 transitions. [2023-11-17 14:56:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-17 14:56:22,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 14:56:22,956 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-17 14:56:22,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-11-17 14:56:22,957 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-17 14:56:22,957 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-17 14:56:22,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.71428571428571) internal successors, (600), 7 states have internal predecessors, (600), 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 14:56:22,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 14:56:22,958 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-17 14:56:22,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 14:56:23,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:23,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 14:56:23,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 14:56:23,164 INFO L85 PathProgramCache]: Analyzing trace with hash -912867331, now seen corresponding path program 2 times [2023-11-17 14:56:23,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 14:56:23,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301742549] [2023-11-17 14:56:23,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:23,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 14:56:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:23,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 14:56:23,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301742549] [2023-11-17 14:56:23,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301742549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 14:56:23,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092405583] [2023-11-17 14:56:23,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 14:56:23,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 14:56:23,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 14:56:23,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 14:56:23,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 14:56:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 14:56:23,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 14:56:23,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 14:56:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:23,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 14:56:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:23,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092405583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 14:56:23,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 14:56:23,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 14:56:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734039009] [2023-11-17 14:56:23,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 14:56:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 14:56:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 14:56:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 14:56:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 14:56:23,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2023-11-17 14:56:23,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 85.38461538461539) internal successors, (1110), 13 states have internal predecessors, (1110), 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 14:56:23,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 14:56:23,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2023-11-17 14:56:23,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 14:56:23,525 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-17 14:56:23,525 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-17 14:56:23,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2023-11-17 14:56:23,527 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-17 14:56:23,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-17 14:56:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 14:56:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 14:56:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1097 transitions. [2023-11-17 14:56:23,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4761284722222222 [2023-11-17 14:56:23,530 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1097 transitions. [2023-11-17 14:56:23,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1097 transitions. [2023-11-17 14:56:23,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 14:56:23,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1097 transitions. [2023-11-17 14:56:23,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 91.41666666666667) internal successors, (1097), 12 states have internal predecessors, (1097), 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 14:56:23,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 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 14:56:23,536 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 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 14:56:23,536 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1097 transitions. [2023-11-17 14:56:23,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-17 14:56:23,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 14:56:23,539 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-17 14:56:23,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-11-17 14:56:23,539 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-17 14:56:23,540 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-17 14:56:23,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.38461538461539) internal successors, (1110), 13 states have internal predecessors, (1110), 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 14:56:23,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 14:56:23,540 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-17 14:56:23,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 14:56:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-17 14:56:23,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 14:56:23,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 14:56:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash 32956701, now seen corresponding path program 3 times [2023-11-17 14:56:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 14:56:23,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380421774] [2023-11-17 14:56:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 14:56:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 14:56:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380421774] [2023-11-17 14:56:23,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380421774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 14:56:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020763616] [2023-11-17 14:56:23,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 14:56:23,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:23,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 14:56:23,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 14:56:23,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 14:56:23,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-17 14:56:23,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 14:56:23,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 14:56:23,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 14:56:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:23,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 14:56:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:24,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020763616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 14:56:24,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 14:56:24,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-11-17 14:56:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359888788] [2023-11-17 14:56:24,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 14:56:24,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 14:56:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 14:56:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 14:56:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-17 14:56:24,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 192 [2023-11-17 14:56:24,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 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 14:56:24,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 14:56:24,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 192 [2023-11-17 14:56:24,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 14:56:24,224 INFO L124 PetriNetUnfolderBase]: 277/419 cut-off events. [2023-11-17 14:56:24,224 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-11-17 14:56:24,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 419 events. 277/419 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 980 event pairs, 20 based on Foata normal form. 18/345 useless extension candidates. Maximal degree in co-relation 1308. Up to 100 conditions per place. [2023-11-17 14:56:24,228 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 84 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2023-11-17 14:56:24,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 500 flow [2023-11-17 14:56:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 14:56:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 14:56:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1275 transitions. [2023-11-17 14:56:24,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47433035714285715 [2023-11-17 14:56:24,231 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1275 transitions. [2023-11-17 14:56:24,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1275 transitions. [2023-11-17 14:56:24,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 14:56:24,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1275 transitions. [2023-11-17 14:56:24,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 91.07142857142857) internal successors, (1275), 14 states have internal predecessors, (1275), 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 14:56:24,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 192.0) internal successors, (2880), 15 states have internal predecessors, (2880), 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 14:56:24,246 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 192.0) internal successors, (2880), 15 states have internal predecessors, (2880), 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 14:56:24,246 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 14 states and 1275 transitions. [2023-11-17 14:56:24,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 500 flow [2023-11-17 14:56:24,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 448 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-17 14:56:24,253 INFO L231 Difference]: Finished difference. Result has 51 places, 25 transitions, 146 flow [2023-11-17 14:56:24,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=146, PETRI_PLACES=51, PETRI_TRANSITIONS=25} [2023-11-17 14:56:24,255 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2023-11-17 14:56:24,255 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 25 transitions, 146 flow [2023-11-17 14:56:24,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 85.4) internal successors, (1281), 15 states have internal predecessors, (1281), 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 14:56:24,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 14:56:24,256 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2023-11-17 14:56:24,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 14:56:24,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:24,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 14:56:24,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 14:56:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1606619517, now seen corresponding path program 4 times [2023-11-17 14:56:24,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 14:56:24,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692140313] [2023-11-17 14:56:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 14:56:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 14:56:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692140313] [2023-11-17 14:56:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692140313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 14:56:24,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112875584] [2023-11-17 14:56:24,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 14:56:24,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:24,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 14:56:24,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 14:56:25,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 14:56:25,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 14:56:25,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 14:56:25,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-17 14:56:25,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 14:56:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:25,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 14:56:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:25,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112875584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 14:56:25,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 14:56:25,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 14:56:25,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969585266] [2023-11-17 14:56:25,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 14:56:25,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 14:56:25,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 14:56:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 14:56:25,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2023-11-17 14:56:25,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 192 [2023-11-17 14:56:25,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 25 transitions, 146 flow. Second operand has 41 states, 41 states have (on average 78.3170731707317) internal successors, (3211), 41 states have internal predecessors, (3211), 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 14:56:25,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 14:56:25,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 192 [2023-11-17 14:56:25,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 14:56:32,837 INFO L124 PetriNetUnfolderBase]: 12587/18888 cut-off events. [2023-11-17 14:56:32,838 INFO L125 PetriNetUnfolderBase]: For 54399/54399 co-relation queries the response was YES. [2023-11-17 14:56:32,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59602 conditions, 18888 events. 12587/18888 cut-off events. For 54399/54399 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 116159 event pairs, 63 based on Foata normal form. 113/14295 useless extension candidates. Maximal degree in co-relation 59578. Up to 3940 conditions per place. [2023-11-17 14:56:32,943 INFO L140 encePairwiseOnDemand]: 187/192 looper letters, 529 selfloop transitions, 901 changer transitions 0/1430 dead transitions. [2023-11-17 14:56:32,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1430 transitions, 11091 flow [2023-11-17 14:56:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-17 14:56:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-11-17 14:56:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9007 transitions. [2023-11-17 14:56:32,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44256092767295596 [2023-11-17 14:56:32,959 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9007 transitions. [2023-11-17 14:56:32,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9007 transitions. [2023-11-17 14:56:32,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 14:56:32,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9007 transitions. [2023-11-17 14:56:32,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 84.97169811320755) internal successors, (9007), 106 states have internal predecessors, (9007), 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 14:56:32,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 192.0) internal successors, (20544), 107 states have internal predecessors, (20544), 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 14:56:33,001 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 192.0) internal successors, (20544), 107 states have internal predecessors, (20544), 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 14:56:33,001 INFO L175 Difference]: Start difference. First operand has 51 places, 25 transitions, 146 flow. Second operand 106 states and 9007 transitions. [2023-11-17 14:56:33,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1430 transitions, 11091 flow [2023-11-17 14:56:33,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 1430 transitions, 9001 flow, removed 597 selfloop flow, removed 11 redundant places. [2023-11-17 14:56:33,247 INFO L231 Difference]: Finished difference. Result has 161 places, 926 transitions, 5608 flow [2023-11-17 14:56:33,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5608, PETRI_PLACES=161, PETRI_TRANSITIONS=926} [2023-11-17 14:56:33,248 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 143 predicate places. [2023-11-17 14:56:33,248 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 926 transitions, 5608 flow [2023-11-17 14:56:33,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.3170731707317) internal successors, (3211), 41 states have internal predecessors, (3211), 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 14:56:33,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 14:56:33,249 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 14:56:33,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 14:56:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:33,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 14:56:33,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 14:56:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1282301993, now seen corresponding path program 1 times [2023-11-17 14:56:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 14:56:33,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562925808] [2023-11-17 14:56:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 14:56:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:34,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 14:56:34,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562925808] [2023-11-17 14:56:34,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562925808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 14:56:34,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443754539] [2023-11-17 14:56:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 14:56:34,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 14:56:34,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 14:56:34,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 14:56:34,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 14:56:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 14:56:34,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 14:56:34,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 14:56:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:34,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 14:56:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 14:56:35,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443754539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 14:56:35,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 14:56:35,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-17 14:56:35,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764164493] [2023-11-17 14:56:35,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 14:56:35,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 14:56:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 14:56:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 14:56:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2023-11-17 14:56:35,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 192 [2023-11-17 14:56:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 926 transitions, 5608 flow. Second operand has 47 states, 47 states have (on average 78.34042553191489) internal successors, (3682), 47 states have internal predecessors, (3682), 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 14:56:35,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 14:56:35,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 192 [2023-11-17 14:56:35,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 14:57:23,816 INFO L124 PetriNetUnfolderBase]: 169295/253828 cut-off events. [2023-11-17 14:57:23,817 INFO L125 PetriNetUnfolderBase]: For 6067747/6067747 co-relation queries the response was YES. [2023-11-17 14:57:25,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074934 conditions, 253828 events. 169295/253828 cut-off events. For 6067747/6067747 co-relation queries the response was YES. Maximal size of possible extension queue 11957. Compared 2237600 event pairs, 3866 based on Foata normal form. 4266/258094 useless extension candidates. Maximal degree in co-relation 1074894. Up to 48060 conditions per place. [2023-11-17 14:57:26,688 INFO L140 encePairwiseOnDemand]: 187/192 looper letters, 1847 selfloop transitions, 24522 changer transitions 0/26369 dead transitions. [2023-11-17 14:57:26,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 26369 transitions, 205412 flow [2023-11-17 14:57:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2023-11-17 14:57:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2023-11-17 14:57:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 20659 transitions. [2023-11-17 14:57:26,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43739413956639567 [2023-11-17 14:57:26,715 INFO L72 ComplementDD]: Start complementDD. Operand 246 states and 20659 transitions. [2023-11-17 14:57:26,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 246 states and 20659 transitions. [2023-11-17 14:57:26,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 14:57:26,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 246 states and 20659 transitions. [2023-11-17 14:57:26,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 247 states, 246 states have (on average 83.97967479674797) internal successors, (20659), 246 states have internal predecessors, (20659), 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 14:57:26,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 247 states, 247 states have (on average 192.0) internal successors, (47424), 247 states have internal predecessors, (47424), 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 14:57:26,799 INFO L81 ComplementDD]: Finished complementDD. Result has 247 states, 247 states have (on average 192.0) internal successors, (47424), 247 states have internal predecessors, (47424), 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 14:57:26,800 INFO L175 Difference]: Start difference. First operand has 161 places, 926 transitions, 5608 flow. Second operand 246 states and 20659 transitions. [2023-11-17 14:57:26,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 26369 transitions, 205412 flow [2023-11-17 15:05:34,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 26369 transitions, 203292 flow, removed 1060 selfloop flow, removed 0 redundant places. [2023-11-17 15:05:34,914 INFO L231 Difference]: Finished difference. Result has 466 places, 25384 transitions, 203831 flow [2023-11-17 15:05:34,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=5496, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=246, PETRI_FLOW=203831, PETRI_PLACES=466, PETRI_TRANSITIONS=25384} [2023-11-17 15:05:34,918 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 448 predicate places. [2023-11-17 15:05:34,918 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 25384 transitions, 203831 flow [2023-11-17 15:05:34,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 78.34042553191489) internal successors, (3682), 47 states have internal predecessors, (3682), 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 15:05:34,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:05:34,919 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:05:34,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 15:05:35,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:05:35,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:05:35,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:05:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1665778901, now seen corresponding path program 1 times [2023-11-17 15:05:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:05:35,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962742722] [2023-11-17 15:05:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:05:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:05:35,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:05:35,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962742722] [2023-11-17 15:05:35,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962742722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:05:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267706297] [2023-11-17 15:05:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:05:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:05:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:05:35,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:05:35,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 15:05:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:05:35,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 15:05:35,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:05:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:05:36,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:05:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:05:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267706297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:05:36,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:05:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-17 15:05:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686471793] [2023-11-17 15:05:36,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:05:36,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 15:05:36,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:05:36,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 15:05:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2023-11-17 15:05:36,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 192 [2023-11-17 15:05:36,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 25384 transitions, 203831 flow. Second operand has 47 states, 47 states have (on average 78.34042553191489) internal successors, (3682), 47 states have internal predecessors, (3682), 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 15:05:36,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:05:36,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 192 [2023-11-17 15:05:36,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 15:05:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-11-17 15:05:47,989 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 15:05:47,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 15:05:48,000 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 15:05:48,000 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 15:05:48,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:05:48,194 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 133 known predicates. [2023-11-17 15:05:48,195 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 15:05:48,196 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 15:05:48,196 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2023-11-17 15:05:48,198 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 15:05:48,198 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 15:05:48,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 03:05:48 BasicIcfg [2023-11-17 15:05:48,200 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 15:05:48,200 INFO L158 Benchmark]: Toolchain (without parser) took 570049.42ms. Allocated memory was 339.7MB in the beginning and 7.2GB in the end (delta: 6.9GB). Free memory was 286.6MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. [2023-11-17 15:05:48,200 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 207.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 15:05:48,201 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.59ms. Allocated memory is still 339.7MB. Free memory was 286.6MB in the beginning and 266.9MB in the end (delta: 19.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-11-17 15:05:48,201 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.16ms. Allocated memory is still 339.7MB. Free memory was 266.9MB in the beginning and 265.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 15:05:48,201 INFO L158 Benchmark]: Boogie Preprocessor took 30.30ms. Allocated memory is still 339.7MB. Free memory was 265.1MB in the beginning and 263.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 15:05:48,201 INFO L158 Benchmark]: RCFGBuilder took 484.64ms. Allocated memory is still 339.7MB. Free memory was 263.5MB in the beginning and 300.8MB in the end (delta: -37.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-11-17 15:05:48,201 INFO L158 Benchmark]: TraceAbstraction took 569114.48ms. Allocated memory was 339.7MB in the beginning and 7.2GB in the end (delta: 6.9GB). Free memory was 299.8MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. [2023-11-17 15:05:48,203 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 207.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 375.59ms. Allocated memory is still 339.7MB. Free memory was 286.6MB in the beginning and 266.9MB in the end (delta: 19.6MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.16ms. Allocated memory is still 339.7MB. Free memory was 266.9MB in the beginning and 265.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.30ms. Allocated memory is still 339.7MB. Free memory was 265.1MB in the beginning and 263.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 484.64ms. Allocated memory is still 339.7MB. Free memory was 263.5MB in the beginning and 300.8MB in the end (delta: -37.2MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 569114.48ms. Allocated memory was 339.7MB in the beginning and 7.2GB in the end (delta: 6.9GB). Free memory was 299.8MB in the beginning and 3.4GB in the end (delta: -3.1GB). Peak memory consumption was 3.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 95 PlacesBefore, 18 PlacesAfterwards, 95 TransitionsBefore, 14 TransitionsAfterwards, 2134 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 95 TotalNumberOfCompositions, 1542 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1472, independent: 1465, independent conditional: 0, independent unconditional: 1465, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1360, independent: 1355, independent conditional: 0, independent unconditional: 1355, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1360, independent: 1355, independent conditional: 0, independent unconditional: 1355, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 12, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1472, independent: 110, independent conditional: 0, independent unconditional: 110, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 1360, unknown conditional: 0, unknown unconditional: 1360] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 681]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 133 known predicates. - TimeoutResultAtElement [Line: 721]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 133 known predicates. - TimeoutResultAtElement [Line: 720]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 133 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 113 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 569.0s, OverallIterations: 7, TraceHistogramMax: 12, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 558.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3353 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3353 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 836 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7380 IncrementalHoareTripleChecker+Invalid, 8216 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 836 mSolverCounterUnsat, 0 mSDtfsCounter, 7380 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 643 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 561 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43467 ImplicationChecksByTransitivity, 23.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=203831occurred in iteration=6, InterpolantAutomatonStates: 387, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 266 ConstructedInterpolants, 0 QuantifiedInterpolants, 3155 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1187 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 129/906 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown