/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/fib_unsafe-6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:09:53,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:09:53,674 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 11:09:53,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:09:53,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:09:53,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:09:53,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:09:53,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:09:53,693 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:09:53,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:09:53,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:09:53,694 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:09:53,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:09:53,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:09:53,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:09:53,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:09:53,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:09:53,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:09:53,696 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:09:53,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:09:53,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:09:53,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:09:53,700 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:09:53,700 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:09:53,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:09:53,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:09:53,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:09:53,704 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:09:53,704 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:09:53,704 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:09:53,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:09:53,705 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:09:53,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:09:53,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:09:53,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:09:53,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:09:53,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:09:53,879 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:09:53,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i [2023-11-17 11:09:54,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:09:55,154 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:09:55,158 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i [2023-11-17 11:09:55,168 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2fcd26b/b68bebc37ec141f5a54dcdfc24bba31d/FLAG5d4e6f0ca [2023-11-17 11:09:55,179 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2fcd26b/b68bebc37ec141f5a54dcdfc24bba31d [2023-11-17 11:09:55,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:09:55,182 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:09:55,183 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:09:55,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:09:55,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:09:55,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465b6bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55, skipping insertion in model container [2023-11-17 11:09:55,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:09:55,448 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-6.i[30243,30256] [2023-11-17 11:09:55,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:09:55,481 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:09:55,519 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-6.i[30243,30256] [2023-11-17 11:09:55,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:09:55,562 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:09:55,562 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:09:55,568 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:09:55,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55 WrapperNode [2023-11-17 11:09:55,570 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:09:55,571 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:09:55,571 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:09:55,571 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:09:55,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,604 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,624 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-17 11:09:55,625 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:09:55,625 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:09:55,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:09:55,626 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:09:55,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,638 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:09:55,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:09:55,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:09:55,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:09:55,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (1/1) ... [2023-11-17 11:09:55,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:09:55,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:55,726 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 11:09:55,747 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 11:09:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-17 11:09:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-17 11:09:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-17 11:09:55,754 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-17 11:09:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:09:55,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:09:55,756 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 11:09:55,880 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:09:55,887 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:09:56,019 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:09:56,122 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:09:56,122 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 11:09:56,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:09:56 BoogieIcfgContainer [2023-11-17 11:09:56,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:09:56,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:09:56,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:09:56,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:09:56,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:09:55" (1/3) ... [2023-11-17 11:09:56,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e70c4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:09:56, skipping insertion in model container [2023-11-17 11:09:56,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:09:55" (2/3) ... [2023-11-17 11:09:56,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e70c4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:09:56, skipping insertion in model container [2023-11-17 11:09:56,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:09:56" (3/3) ... [2023-11-17 11:09:56,132 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2023-11-17 11:09:56,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:09:56,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:09:56,146 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:09:56,184 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:09:56,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:09:56,256 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:09:56,257 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:56,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 11:09:56,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-17 11:09:56,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,265 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:09:56,284 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 60 flow [2023-11-17 11:09:56,303 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-17 11:09:56,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:56,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-17 11:09:56,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 270 [2023-11-17 11:09:57,578 INFO L134 LiptonReduction]: Checked pairs total: 210 [2023-11-17 11:09:57,578 INFO L136 LiptonReduction]: Total number of compositions: 18 [2023-11-17 11:09:57,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:09:57,594 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;@1c3cf3cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:09:57,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:09:57,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:09:57,596 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-17 11:09:57,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:09:57,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:09:57,597 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 11:09:57,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -146274990, now seen corresponding path program 1 times [2023-11-17 11:09:57,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:57,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443483260] [2023-11-17 11:09:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:57,828 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 11:09:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:57,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443483260] [2023-11-17 11:09:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443483260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:09:57,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:09:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:09:57,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370196108] [2023-11-17 11:09:57,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:09:57,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:09:57,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:09:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:09:57,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:57,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 11:09:57,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:57,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:57,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:57,928 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-17 11:09:57,929 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:09:57,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 323 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 11:09:57,933 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-17 11:09:57,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-17 11:09:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:09:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:09:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2023-11-17 11:09:57,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41843971631205673 [2023-11-17 11:09:57,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:57,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 59 transitions. [2023-11-17 11:09:57,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 11:09:57,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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 11:09:57,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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 11:09:57,951 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 59 transitions. [2023-11-17 11:09:57,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-17 11:09:57,953 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 11:09:57,954 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-17 11:09:57,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, 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 11:09:57,958 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-17 11:09:57,958 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-17 11:09:57,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 11:09:57,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:57,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:09:57,958 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 11:09:57,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -239558132, now seen corresponding path program 1 times [2023-11-17 11:09:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:57,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337718195] [2023-11-17 11:09:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:58,016 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 11:09:58,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:58,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337718195] [2023-11-17 11:09:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337718195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:58,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356597277] [2023-11-17 11:09:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:58,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:58,020 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 11:09:58,062 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 11:09:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:58,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:09:58,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:58,151 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 11:09:58,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:58,170 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 11:09:58,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356597277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:58,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:58,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:09:58,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938713490] [2023-11-17 11:09:58,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:09:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:58,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:09:58,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:09:58,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:58,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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 11:09:58,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:58,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:58,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:58,269 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-17 11:09:58,269 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:09:58,270 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 442 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 11:09:58,272 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-17 11:09:58,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-17 11:09:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:09:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:09:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2023-11-17 11:09:58,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134751773049644 [2023-11-17 11:09:58,276 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 116 transitions. [2023-11-17 11:09:58,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 116 transitions. [2023-11-17 11:09:58,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:58,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 116 transitions. [2023-11-17 11:09:58,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 11:09:58,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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 11:09:58,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 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 11:09:58,282 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 116 transitions. [2023-11-17 11:09:58,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-17 11:09:58,285 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 11:09:58,291 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-17 11:09:58,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, 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 11:09:58,292 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-17 11:09:58,292 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-17 11:09:58,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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 11:09:58,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:58,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:58,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:09:58,498 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 11:09:58,500 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 11:09:58,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1558602706, now seen corresponding path program 2 times [2023-11-17 11:09:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:58,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184480339] [2023-11-17 11:09:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:58,607 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 11:09:58,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184480339] [2023-11-17 11:09:58,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184480339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162354764] [2023-11-17 11:09:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:09:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:58,613 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 11:09:58,647 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 11:09:58,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:09:58,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:58,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:09:58,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:58,744 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 11:09:58,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:58,789 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 11:09:58,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162354764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:58,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:58,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:09:58,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519171678] [2023-11-17 11:09:58,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:58,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:09:58,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:09:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:09:58,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:58,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 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 11:09:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:58,922 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-17 11:09:58,922 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-17 11:09:58,924 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 841 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 11:09:58,926 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-17 11:09:58,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-17 11:09:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:09:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:09:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2023-11-17 11:09:58,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41312056737588654 [2023-11-17 11:09:58,929 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:58,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 233 transitions. [2023-11-17 11:09:58,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 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 11:09:58,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 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 11:09:58,932 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 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 11:09:58,932 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 233 transitions. [2023-11-17 11:09:58,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-17 11:09:58,935 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 11:09:58,936 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-17 11:09:58,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, 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 11:09:58,937 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-17 11:09:58,937 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-17 11:09:58,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.384615384615385) internal successors, (174), 13 states have internal predecessors, (174), 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 11:09:58,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:58,937 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:58,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 11:09:59,153 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 11:09:59,154 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 11:09:59,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:09:59,154 INFO L85 PathProgramCache]: Analyzing trace with hash -254158446, now seen corresponding path program 3 times [2023-11-17 11:09:59,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:09:59,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223588264] [2023-11-17 11:09:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:09:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:09:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:09:59,433 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 11:09:59,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:09:59,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223588264] [2023-11-17 11:09:59,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223588264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:09:59,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734415938] [2023-11-17 11:09:59,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:09:59,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:09:59,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:09:59,449 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 11:09:59,478 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 11:09:59,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-17 11:09:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:09:59,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 11:09:59,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:09:59,568 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 11:09:59,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:09:59,655 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 11:09:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734415938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:09:59,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:09:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2023-11-17 11:09:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514509635] [2023-11-17 11:09:59,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:09:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 11:09:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:09:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 11:09:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-17 11:09:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2023-11-17 11:09:59,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 17 states, 17 states have (on average 13.352941176470589) internal successors, (227), 17 states have internal predecessors, (227), 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 11:09:59,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:09:59,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2023-11-17 11:09:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:09:59,818 INFO L124 PetriNetUnfolderBase]: 313/473 cut-off events. [2023-11-17 11:09:59,818 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2023-11-17 11:09:59,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 473 events. 313/473 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1105 event pairs, 20 based on Foata normal form. 36/405 useless extension candidates. Maximal degree in co-relation 1470. Up to 118 conditions per place. [2023-11-17 11:09:59,821 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 96 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2023-11-17 11:09:59,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 111 transitions, 568 flow [2023-11-17 11:09:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 11:09:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 11:09:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 307 transitions. [2023-11-17 11:09:59,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40824468085106386 [2023-11-17 11:09:59,830 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 307 transitions. [2023-11-17 11:09:59,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 307 transitions. [2023-11-17 11:09:59,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:09:59,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 307 transitions. [2023-11-17 11:09:59,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 19.1875) internal successors, (307), 16 states have internal predecessors, (307), 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 11:09:59,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 47.0) internal successors, (799), 17 states have internal predecessors, (799), 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 11:09:59,839 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 47.0) internal successors, (799), 17 states have internal predecessors, (799), 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 11:09:59,839 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 16 states and 307 transitions. [2023-11-17 11:09:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 111 transitions, 568 flow [2023-11-17 11:09:59,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 111 transitions, 512 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-17 11:09:59,844 INFO L231 Difference]: Finished difference. Result has 55 places, 27 transitions, 170 flow [2023-11-17 11:09:59,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, 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=16, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=27} [2023-11-17 11:09:59,844 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 37 predicate places. [2023-11-17 11:09:59,844 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions, 170 flow [2023-11-17 11:09:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.352941176470589) internal successors, (227), 17 states have internal predecessors, (227), 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 11:09:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:09:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2023-11-17 11:09:59,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 11:10:00,055 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 11:10:00,055 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 11:10:00,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:10:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash -722200558, now seen corresponding path program 4 times [2023-11-17 11:10:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:10:00,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404040597] [2023-11-17 11:10:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:10:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:00,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:10:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404040597] [2023-11-17 11:10:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404040597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:10:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563926205] [2023-11-17 11:10:00,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:10:00,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:10:00,689 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 11:10:00,692 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 11:10:00,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:10:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:10:00,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-17 11:10:00,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:10:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:01,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:10:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563926205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:10:01,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:10:01,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-17 11:10:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122930941] [2023-11-17 11:10:01,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:10:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-17 11:10:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:10:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-17 11:10:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1759, Unknown=0, NotChecked=0, Total=2162 [2023-11-17 11:10:01,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:10:01,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 27 transitions, 170 flow. Second operand has 47 states, 47 states have (on average 8.27659574468085) internal successors, (389), 47 states have internal predecessors, (389), 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 11:10:01,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:10:01,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:10:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:10:11,859 INFO L124 PetriNetUnfolderBase]: 19235/28862 cut-off events. [2023-11-17 11:10:11,859 INFO L125 PetriNetUnfolderBase]: For 101327/101327 co-relation queries the response was YES. [2023-11-17 11:10:11,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94404 conditions, 28862 events. 19235/28862 cut-off events. For 101327/101327 co-relation queries the response was YES. Maximal size of possible extension queue 916. Compared 186417 event pairs, 71 based on Foata normal form. 129/21793 useless extension candidates. Maximal degree in co-relation 94378. Up to 6019 conditions per place. [2023-11-17 11:10:12,087 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 684 selfloop transitions, 1349 changer transitions 0/2033 dead transitions. [2023-11-17 11:10:12,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 2033 transitions, 17187 flow [2023-11-17 11:10:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-11-17 11:10:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2023-11-17 11:10:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 2052 transitions. [2023-11-17 11:10:12,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31868302531448983 [2023-11-17 11:10:12,100 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 2052 transitions. [2023-11-17 11:10:12,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 2052 transitions. [2023-11-17 11:10:12,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:10:12,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 2052 transitions. [2023-11-17 11:10:12,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 14.978102189781023) internal successors, (2052), 137 states have internal predecessors, (2052), 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 11:10:12,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 47.0) internal successors, (6486), 138 states have internal predecessors, (6486), 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 11:10:12,121 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 47.0) internal successors, (6486), 138 states have internal predecessors, (6486), 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 11:10:12,121 INFO L175 Difference]: Start difference. First operand has 55 places, 27 transitions, 170 flow. Second operand 137 states and 2052 transitions. [2023-11-17 11:10:12,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 2033 transitions, 17187 flow [2023-11-17 11:10:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 2033 transitions, 13241 flow, removed 1435 selfloop flow, removed 11 redundant places. [2023-11-17 11:10:12,523 INFO L231 Difference]: Finished difference. Result has 198 places, 1376 transitions, 8323 flow [2023-11-17 11:10:12,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=8323, PETRI_PLACES=198, PETRI_TRANSITIONS=1376} [2023-11-17 11:10:12,524 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 180 predicate places. [2023-11-17 11:10:12,524 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 1376 transitions, 8323 flow [2023-11-17 11:10:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 8.27659574468085) internal successors, (389), 47 states have internal predecessors, (389), 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 11:10:12,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:10:12,525 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:10:12,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 11:10:12,729 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 11:10:12,730 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 11:10:12,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:10:12,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2139035654, now seen corresponding path program 1 times [2023-11-17 11:10:12,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:10:12,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244348179] [2023-11-17 11:10:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:10:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:13,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:10:13,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244348179] [2023-11-17 11:10:13,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244348179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:10:13,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005047947] [2023-11-17 11:10:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:10:13,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:10:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:10:13,557 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 11:10:13,593 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 11:10:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:10:13,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-17 11:10:13,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:10:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:14,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:10:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:10:15,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005047947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:10:15,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:10:15,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-11-17 11:10:15,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603997067] [2023-11-17 11:10:15,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:10:15,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-17 11:10:15,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:10:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-17 11:10:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2320, Unknown=0, NotChecked=0, Total=2756 [2023-11-17 11:10:15,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2023-11-17 11:10:15,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 1376 transitions, 8323 flow. Second operand has 53 states, 53 states have (on average 8.30188679245283) internal successors, (440), 53 states have internal predecessors, (440), 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 11:10:15,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:10:15,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2023-11-17 11:10:15,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand