/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:20:14,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:20:14,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:20:14,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:20:14,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:20:14,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:20:14,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:20:14,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:20:14,300 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:20:14,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:20:14,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:20:14,306 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:20:14,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:20:14,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:20:14,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:20:14,307 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:20:14,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:20:14,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:20:14,308 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:20:14,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:20:14,308 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:20:14,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:20:14,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:20:14,309 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:20:14,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:20:14,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:20:14,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:20:14,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:20:14,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:20:14,311 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:20:14,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:20:14,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:20:14,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:20:14,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:20:14,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:20:14,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:20:14,584 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:20:14,585 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:20:14,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i [2023-11-17 11:20:15,758 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:20:16,045 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:20:16,048 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i [2023-11-17 11:20:16,061 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c50cfa8d/6e1af63e50334222a3484a98db65dd49/FLAGf55275b5c [2023-11-17 11:20:16,075 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c50cfa8d/6e1af63e50334222a3484a98db65dd49 [2023-11-17 11:20:16,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:20:16,079 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:20:16,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:20:16,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:20:16,084 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:20:16,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f32a46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16, skipping insertion in model container [2023-11-17 11:20:16,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,144 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:20:16,442 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i[31355,31368] [2023-11-17 11:20:16,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:20:16,475 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:20:16,525 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i[31355,31368] [2023-11-17 11:20:16,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:20:16,576 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:20:16,576 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:20:16,583 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:20:16,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16 WrapperNode [2023-11-17 11:20:16,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:20:16,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:20:16,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:20:16,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:20:16,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,634 INFO L138 Inliner]: procedures = 172, calls = 38, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 133 [2023-11-17 11:20:16,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:20:16,636 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:20:16,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:20:16,636 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:20:16,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,654 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:20:16,665 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:20:16,665 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:20:16,665 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:20:16,666 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (1/1) ... [2023-11-17 11:20:16,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:20:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:20:16,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:20:16,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:20:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:20:16,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:20:16,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:20:16,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:20:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:20:16,741 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:20:16,862 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:20:16,863 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:20:17,113 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:20:17,350 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:20:17,351 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:20:17,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:20:17 BoogieIcfgContainer [2023-11-17 11:20:17,352 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:20:17,354 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:20:17,355 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:20:17,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:20:17,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:20:16" (1/3) ... [2023-11-17 11:20:17,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c97ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:20:17, skipping insertion in model container [2023-11-17 11:20:17,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:20:16" (2/3) ... [2023-11-17 11:20:17,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c97ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:20:17, skipping insertion in model container [2023-11-17 11:20:17,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:20:17" (3/3) ... [2023-11-17 11:20:17,360 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-2-pthread.i [2023-11-17 11:20:17,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:20:17,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:20:17,378 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:20:17,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:17,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 36 transitions, 76 flow [2023-11-17 11:20:17,481 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-11-17 11:20:17,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:17,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 5/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-17 11:20:17,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 36 transitions, 76 flow [2023-11-17 11:20:17,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 36 transitions, 76 flow [2023-11-17 11:20:17,492 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:17,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 36 transitions, 76 flow [2023-11-17 11:20:17,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 36 transitions, 76 flow [2023-11-17 11:20:17,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 36 transitions, 76 flow [2023-11-17 11:20:17,518 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-11-17 11:20:17,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:17,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 5/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-17 11:20:17,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 240 [2023-11-17 11:20:20,356 INFO L134 LiptonReduction]: Checked pairs total: 272 [2023-11-17 11:20:20,356 INFO L136 LiptonReduction]: Total number of compositions: 31 [2023-11-17 11:20:20,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:20,377 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;@546d5997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:20,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:20:20,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:20,381 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 11:20:20,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:20,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:20,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 11:20:20,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:20:20,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 361093655, now seen corresponding path program 1 times [2023-11-17 11:20:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:20,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610747962] [2023-11-17 11:20:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610747962] [2023-11-17 11:20:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610747962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 11:20:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454886015] [2023-11-17 11:20:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:20:20,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:20:20,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:20:20,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 67 [2023-11-17 11:20:20,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 11 transitions, 26 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:20,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 67 [2023-11-17 11:20:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:20,661 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-17 11:20:20,662 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:20:20,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 28 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 11:20:20,663 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 11:20:20,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 11:20:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:20:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:20:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 26 transitions. [2023-11-17 11:20:20,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19402985074626866 [2023-11-17 11:20:20,674 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 26 transitions. [2023-11-17 11:20:20,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 26 transitions. [2023-11-17 11:20:20,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:20,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 26 transitions. [2023-11-17 11:20:20,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,681 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,683 INFO L175 Difference]: Start difference. First operand has 12 places, 11 transitions, 26 flow. Second operand 2 states and 26 transitions. [2023-11-17 11:20:20,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 11:20:20,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:20:20,686 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 11:20:20,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-17 11:20:20,691 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 11:20:20,692 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 11:20:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:20,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:20,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:20:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:20:20,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:20:20,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:20,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1691073001, now seen corresponding path program 1 times [2023-11-17 11:20:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959275918] [2023-11-17 11:20:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:20,718 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:20,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:20,752 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:20,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:20:20,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:20:20,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:20:20,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:20:20,760 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:20:20,763 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:20,764 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:20:20,805 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:20,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 67 transitions, 144 flow [2023-11-17 11:20:20,832 INFO L124 PetriNetUnfolderBase]: 10/72 cut-off events. [2023-11-17 11:20:20,832 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:20,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 10/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2023-11-17 11:20:20,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 67 transitions, 144 flow [2023-11-17 11:20:20,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 67 transitions, 144 flow [2023-11-17 11:20:20,836 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:20,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 67 transitions, 144 flow [2023-11-17 11:20:20,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 67 transitions, 144 flow [2023-11-17 11:20:20,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 67 transitions, 144 flow [2023-11-17 11:20:20,852 INFO L124 PetriNetUnfolderBase]: 10/72 cut-off events. [2023-11-17 11:20:20,852 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 10/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2023-11-17 11:20:20,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 2340 [2023-11-17 11:20:22,565 INFO L134 LiptonReduction]: Checked pairs total: 4956 [2023-11-17 11:20:22,565 INFO L136 LiptonReduction]: Total number of compositions: 36 [2023-11-17 11:20:22,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:22,574 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;@546d5997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:22,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:20:22,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:22,579 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-17 11:20:22,579 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:20:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:22,579 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:20:22,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:20:22,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash -292724460, now seen corresponding path program 1 times [2023-11-17 11:20:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:22,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415191261] [2023-11-17 11:20:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:22,601 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:22,629 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:22,630 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:22,630 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:20:22,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:20:22,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:20:22,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:20:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:20:22,631 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:20:22,631 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:22,632 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:20:22,688 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:22,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 98 transitions, 214 flow [2023-11-17 11:20:22,727 INFO L124 PetriNetUnfolderBase]: 15/106 cut-off events. [2023-11-17 11:20:22,727 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:20:22,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 15/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-11-17 11:20:22,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 98 transitions, 214 flow [2023-11-17 11:20:22,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 98 transitions, 214 flow [2023-11-17 11:20:22,733 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:22,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 98 transitions, 214 flow [2023-11-17 11:20:22,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 98 transitions, 214 flow [2023-11-17 11:20:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 98 transitions, 214 flow [2023-11-17 11:20:22,755 INFO L124 PetriNetUnfolderBase]: 15/106 cut-off events. [2023-11-17 11:20:22,755 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:20:22,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 15/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-11-17 11:20:22,759 INFO L119 LiptonReduction]: Number of co-enabled transitions 6300 [2023-11-17 11:20:25,098 INFO L134 LiptonReduction]: Checked pairs total: 13395 [2023-11-17 11:20:25,098 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-11-17 11:20:25,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:25,102 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;@546d5997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:25,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:20:25,106 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:25,106 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-17 11:20:25,106 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:20:25,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:25,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:25,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:20:25,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1970378295, now seen corresponding path program 1 times [2023-11-17 11:20:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:25,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390701107] [2023-11-17 11:20:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:25,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:25,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390701107] [2023-11-17 11:20:25,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390701107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:25,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:25,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:25,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115200508] [2023-11-17 11:20:25,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:25,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:25,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:25,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 154 [2023-11-17 11:20:25,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:25,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:25,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 154 [2023-11-17 11:20:25,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:28,330 INFO L124 PetriNetUnfolderBase]: 23176/31845 cut-off events. [2023-11-17 11:20:28,330 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-11-17 11:20:28,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63490 conditions, 31845 events. 23176/31845 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 168459 event pairs, 5329 based on Foata normal form. 0/25245 useless extension candidates. Maximal degree in co-relation 27980. Up to 28462 conditions per place. [2023-11-17 11:20:28,598 INFO L140 encePairwiseOnDemand]: 143/154 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-17 11:20:28,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 330 flow [2023-11-17 11:20:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:20:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:20:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-17 11:20:28,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051948051948052 [2023-11-17 11:20:28,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-17 11:20:28,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-17 11:20:28,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:28,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-17 11:20:28,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:28,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:28,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:28,610 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 136 flow. Second operand 3 states and 141 transitions. [2023-11-17 11:20:28,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 330 flow [2023-11-17 11:20:28,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 326 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 11:20:28,616 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 156 flow [2023-11-17 11:20:28,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-11-17 11:20:28,617 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-17 11:20:28,617 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 156 flow [2023-11-17 11:20:28,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:28,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:28,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:28,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:20:28,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:20:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash -952910876, now seen corresponding path program 1 times [2023-11-17 11:20:28,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:28,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663141724] [2023-11-17 11:20:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:28,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:28,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663141724] [2023-11-17 11:20:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663141724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:20:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613542552] [2023-11-17 11:20:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:28,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:20:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:20:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:20:28,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 154 [2023-11-17 11:20:28,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:28,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:28,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 154 [2023-11-17 11:20:28,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:20:32,424 INFO L124 PetriNetUnfolderBase]: 34341/46535 cut-off events. [2023-11-17 11:20:32,425 INFO L125 PetriNetUnfolderBase]: For 2734/2734 co-relation queries the response was YES. [2023-11-17 11:20:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98360 conditions, 46535 events. 34341/46535 cut-off events. For 2734/2734 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 255618 event pairs, 6703 based on Foata normal form. 0/37607 useless extension candidates. Maximal degree in co-relation 82666. Up to 31026 conditions per place. [2023-11-17 11:20:32,690 INFO L140 encePairwiseOnDemand]: 147/154 looper letters, 142 selfloop transitions, 6 changer transitions 0/151 dead transitions. [2023-11-17 11:20:32,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 151 transitions, 684 flow [2023-11-17 11:20:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:20:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:20:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2023-11-17 11:20:32,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103896103896104 [2023-11-17 11:20:32,697 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 239 transitions. [2023-11-17 11:20:32,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 239 transitions. [2023-11-17 11:20:32,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:20:32,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 239 transitions. [2023-11-17 11:20:32,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:32,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:32,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:32,704 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 156 flow. Second operand 5 states and 239 transitions. [2023-11-17 11:20:32,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 151 transitions, 684 flow [2023-11-17 11:20:32,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 151 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:20:32,719 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 178 flow [2023-11-17 11:20:32,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-17 11:20:32,721 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2023-11-17 11:20:32,721 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 178 flow [2023-11-17 11:20:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:32,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:32,721 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:20:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:20:32,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:20:32,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash -675381162, now seen corresponding path program 1 times [2023-11-17 11:20:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:32,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318721265] [2023-11-17 11:20:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:32,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:32,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:20:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:20:32,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:20:32,768 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:20:32,768 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:20:32,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:20:32,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:20:32,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:20:32,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:20:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:20:32,770 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:20:32,771 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:20:32,771 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:20:32,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:20:32,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 129 transitions, 286 flow [2023-11-17 11:20:32,847 INFO L124 PetriNetUnfolderBase]: 20/140 cut-off events. [2023-11-17 11:20:32,847 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:20:32,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 20/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 441 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2023-11-17 11:20:32,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 129 transitions, 286 flow [2023-11-17 11:20:32,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 129 transitions, 286 flow [2023-11-17 11:20:32,849 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:20:32,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 129 transitions, 286 flow [2023-11-17 11:20:32,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 129 transitions, 286 flow [2023-11-17 11:20:32,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 129 transitions, 286 flow [2023-11-17 11:20:32,863 INFO L124 PetriNetUnfolderBase]: 20/140 cut-off events. [2023-11-17 11:20:32,863 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:20:32,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 20/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 441 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2023-11-17 11:20:32,868 INFO L119 LiptonReduction]: Number of co-enabled transitions 12120 [2023-11-17 11:20:35,920 INFO L134 LiptonReduction]: Checked pairs total: 26113 [2023-11-17 11:20:35,920 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-11-17 11:20:35,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:20:35,923 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;@546d5997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:20:35,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:20:35,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:20:35,926 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-11-17 11:20:35,926 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:20:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:20:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:20:35,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:20:35,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:20:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 341441719, now seen corresponding path program 1 times [2023-11-17 11:20:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:20:35,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63752817] [2023-11-17 11:20:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:20:35,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:20:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:20:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:20:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:20:35,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63752817] [2023-11-17 11:20:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63752817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:20:35,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:20:35,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:20:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412687168] [2023-11-17 11:20:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:20:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:20:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:20:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:20:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:20:35,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 203 [2023-11-17 11:20:35,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:20:35,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:20:35,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 203 [2023-11-17 11:20:35,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:21:09,853 INFO L124 PetriNetUnfolderBase]: 403864/514329 cut-off events. [2023-11-17 11:21:09,853 INFO L125 PetriNetUnfolderBase]: For 25419/25419 co-relation queries the response was YES. [2023-11-17 11:21:10,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027211 conditions, 514329 events. 403864/514329 cut-off events. For 25419/25419 co-relation queries the response was YES. Maximal size of possible extension queue 8005. Compared 3033613 event pairs, 99079 based on Foata normal form. 0/400449 useless extension candidates. Maximal degree in co-relation 280729. Up to 482185 conditions per place. [2023-11-17 11:21:12,544 INFO L140 encePairwiseOnDemand]: 189/203 looper letters, 91 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-11-17 11:21:12,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 443 flow [2023-11-17 11:21:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:21:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:21:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-11-17 11:21:12,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30377668308702793 [2023-11-17 11:21:12,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-11-17 11:21:12,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-11-17 11:21:12,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:21:12,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-11-17 11:21:12,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:12,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:12,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:12,548 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 182 flow. Second operand 3 states and 185 transitions. [2023-11-17 11:21:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 443 flow [2023-11-17 11:21:12,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 431 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:21:12,576 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 205 flow [2023-11-17 11:21:12,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2023-11-17 11:21:12,577 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-11-17 11:21:12,577 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 205 flow [2023-11-17 11:21:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:12,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:21:12,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:21:12,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:21:12,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:21:12,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:21:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1993438736, now seen corresponding path program 1 times [2023-11-17 11:21:12,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:21:12,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936386170] [2023-11-17 11:21:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:21:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:21:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:21:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:21:12,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:21:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936386170] [2023-11-17 11:21:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936386170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:21:12,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:21:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:21:12,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010528562] [2023-11-17 11:21:12,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:21:12,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:21:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:21:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:21:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:21:12,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 203 [2023-11-17 11:21:12,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:21:12,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:21:12,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 203 [2023-11-17 11:21:12,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand