/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/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:31:56,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:31:56,054 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 12:31:56,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:31:56,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:31:56,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:31:56,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:31:56,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:31:56,080 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:31:56,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:31:56,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:31:56,083 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:31:56,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:31:56,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:31:56,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:31:56,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:31:56,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:31:56,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:31:56,085 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:31:56,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:31:56,085 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:31:56,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:31:56,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:31:56,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:31:56,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:31:56,087 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:31:56,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:31:56,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:31:56,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:31:56,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:31:56,298 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:31:56,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:31:56,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-11-17 12:31:57,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:31:57,400 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:31:57,400 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-11-17 12:31:57,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d0683bc/6184e823dd4040ef8d49216b2c4eed97/FLAGd08add975 [2023-11-17 12:31:57,413 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d0683bc/6184e823dd4040ef8d49216b2c4eed97 [2023-11-17 12:31:57,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:31:57,416 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:31:57,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:31:57,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:31:57,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:31:57,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3caf2f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57, skipping insertion in model container [2023-11-17 12:31:57,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:31:57,556 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-17 12:31:57,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:31:57,572 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:31:57,585 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-17 12:31:57,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:31:57,592 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:31:57,593 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:31:57,597 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:31:57,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57 WrapperNode [2023-11-17 12:31:57,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:31:57,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:31:57,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:31:57,598 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:31:57,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,630 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 149 [2023-11-17 12:31:57,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:31:57,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:31:57,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:31:57,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:31:57,636 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,638 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,638 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:31:57,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:31:57,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:31:57,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:31:57,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (1/1) ... [2023-11-17 12:31:57,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:31:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:31:57,673 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 12:31:57,674 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 12:31:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:31:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:31:57,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:31:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:31:57,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:31:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:31:57,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:31:57,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:31:57,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:31:57,696 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 12:31:57,815 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:31:57,817 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:31:58,017 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:31:58,149 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:31:58,150 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 12:31:58,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:31:58 BoogieIcfgContainer [2023-11-17 12:31:58,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:31:58,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:31:58,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:31:58,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:31:58,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:31:57" (1/3) ... [2023-11-17 12:31:58,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2789c027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:31:58, skipping insertion in model container [2023-11-17 12:31:58,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:31:57" (2/3) ... [2023-11-17 12:31:58,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2789c027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:31:58, skipping insertion in model container [2023-11-17 12:31:58,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:31:58" (3/3) ... [2023-11-17 12:31:58,157 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-17 12:31:58,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:31:58,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:31:58,169 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:31:58,211 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:31:58,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2023-11-17 12:31:58,251 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2023-11-17 12:31:58,252 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:31:58,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-17 12:31:58,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2023-11-17 12:31:58,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2023-11-17 12:31:58,300 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:31:58,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 30 transitions, 72 flow [2023-11-17 12:31:58,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 30 transitions, 72 flow [2023-11-17 12:31:58,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 30 transitions, 72 flow [2023-11-17 12:31:58,339 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-17 12:31:58,340 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:31:58,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 6/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-17 12:31:58,341 INFO L119 LiptonReduction]: Number of co-enabled transitions 262 [2023-11-17 12:31:58,895 INFO L134 LiptonReduction]: Checked pairs total: 317 [2023-11-17 12:31:58,895 INFO L136 LiptonReduction]: Total number of compositions: 20 [2023-11-17 12:31:58,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:31:58,916 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;@4ff4c99f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:31:58,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:31:58,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:31:58,923 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-17 12:31:58,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:31:58,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:58,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:58,924 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 12:31:58,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1951819228, now seen corresponding path program 1 times [2023-11-17 12:31:58,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:58,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370834577] [2023-11-17 12:31:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:58,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:59,179 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 12:31:59,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:59,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370834577] [2023-11-17 12:31:59,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370834577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:59,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:59,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:31:59,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291232415] [2023-11-17 12:31:59,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:31:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:59,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:31:59,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:31:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:31:59,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 12:31:59,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:59,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:31:59,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:59,270 INFO L124 PetriNetUnfolderBase]: 58/108 cut-off events. [2023-11-17 12:31:59,270 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-17 12:31:59,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 108 events. 58/108 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 269 event pairs, 15 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 161. Up to 61 conditions per place. [2023-11-17 12:31:59,273 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 21 selfloop transitions, 2 changer transitions 4/28 dead transitions. [2023-11-17 12:31:59,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2023-11-17 12:31:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:31:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:31:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-17 12:31:59,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34591194968553457 [2023-11-17 12:31:59,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-17 12:31:59,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-17 12:31:59,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:59,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-17 12:31:59,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 12:31:59,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 12:31:59,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 12:31:59,293 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 55 transitions. [2023-11-17 12:31:59,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2023-11-17 12:31:59,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:31:59,296 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-17 12:31:59,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-17 12:31:59,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-17 12:31:59,299 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-17 12:31:59,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 12:31:59,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:59,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:31:59,300 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 12:31:59,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1582184593, now seen corresponding path program 1 times [2023-11-17 12:31:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:59,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743583856] [2023-11-17 12:31:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:59,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:31:59,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743583856] [2023-11-17 12:31:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743583856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:59,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:31:59,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585978331] [2023-11-17 12:31:59,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:59,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:31:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:31:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:31:59,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:31:59,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 12:31:59,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:59,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:31:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:59,445 INFO L124 PetriNetUnfolderBase]: 54/107 cut-off events. [2023-11-17 12:31:59,445 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-17 12:31:59,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 107 events. 54/107 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 290 event pairs, 21 based on Foata normal form. 7/94 useless extension candidates. Maximal degree in co-relation 146. Up to 66 conditions per place. [2023-11-17 12:31:59,447 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 17 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-11-17 12:31:59,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 114 flow [2023-11-17 12:31:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:31:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:31:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2023-11-17 12:31:59,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32075471698113206 [2023-11-17 12:31:59,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 51 transitions. [2023-11-17 12:31:59,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 51 transitions. [2023-11-17 12:31:59,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:59,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 51 transitions. [2023-11-17 12:31:59,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 12:31:59,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 12:31:59,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 12:31:59,452 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 51 transitions. [2023-11-17 12:31:59,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 114 flow [2023-11-17 12:31:59,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:31:59,453 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 60 flow [2023-11-17 12:31:59,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-11-17 12:31:59,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-17 12:31:59,454 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 60 flow [2023-11-17 12:31:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 12:31:59,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:59,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:31:59,456 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 12:31:59,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash -686394772, now seen corresponding path program 1 times [2023-11-17 12:31:59,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:59,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909228537] [2023-11-17 12:31:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:59,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:31:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:31:59,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:31:59,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909228537] [2023-11-17 12:31:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909228537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:31:59,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:31:59,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:31:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936133386] [2023-11-17 12:31:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:31:59,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:31:59,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:31:59,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:31:59,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:31:59,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:31:59,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 12:31:59,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:31:59,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:31:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:59,667 INFO L124 PetriNetUnfolderBase]: 69/148 cut-off events. [2023-11-17 12:31:59,667 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-17 12:31:59,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 148 events. 69/148 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 499 event pairs, 52 based on Foata normal form. 6/151 useless extension candidates. Maximal degree in co-relation 248. Up to 107 conditions per place. [2023-11-17 12:31:59,668 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 17 selfloop transitions, 2 changer transitions 11/31 dead transitions. [2023-11-17 12:31:59,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 148 flow [2023-11-17 12:31:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:31:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:31:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-17 12:31:59,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30660377358490565 [2023-11-17 12:31:59,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-17 12:31:59,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-17 12:31:59,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:59,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-17 12:31:59,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 12:31:59,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 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 12:31:59,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 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 12:31:59,672 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 60 flow. Second operand 4 states and 65 transitions. [2023-11-17 12:31:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 148 flow [2023-11-17 12:31:59,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:31:59,674 INFO L231 Difference]: Finished difference. Result has 26 places, 20 transitions, 72 flow [2023-11-17 12:31:59,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=20} [2023-11-17 12:31:59,675 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-17 12:31:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 20 transitions, 72 flow [2023-11-17 12:31:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 12:31:59,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:31:59,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:31:59,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:31:59,676 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 12:31:59,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:31:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash 247621054, now seen corresponding path program 1 times [2023-11-17 12:31:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:31:59,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573931721] [2023-11-17 12:31:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:31:59,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:31:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:00,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:00,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573931721] [2023-11-17 12:32:00,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573931721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515595513] [2023-11-17 12:32:00,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:00,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:00,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:00,453 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 12:32:00,472 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 12:32:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:00,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:32:00,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:00,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:00,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:32:00,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 70 [2023-11-17 12:32:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:00,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515595513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:00,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 14 [2023-11-17 12:32:00,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813588254] [2023-11-17 12:32:00,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:00,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:32:00,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:00,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:32:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:32:00,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:00,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 72 flow. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 16 states have internal predecessors, (139), 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 12:32:00,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:00,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:00,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:01,317 INFO L124 PetriNetUnfolderBase]: 107/213 cut-off events. [2023-11-17 12:32:01,317 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-17 12:32:01,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 213 events. 107/213 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 786 event pairs, 6 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 503. Up to 48 conditions per place. [2023-11-17 12:32:01,321 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 30 selfloop transitions, 11 changer transitions 28/70 dead transitions. [2023-11-17 12:32:01,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 70 transitions, 344 flow [2023-11-17 12:32:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:32:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:32:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2023-11-17 12:32:01,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2332761578044597 [2023-11-17 12:32:01,324 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 136 transitions. [2023-11-17 12:32:01,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 136 transitions. [2023-11-17 12:32:01,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:01,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 136 transitions. [2023-11-17 12:32:01,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 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 12:32:01,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 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 12:32:01,328 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 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 12:32:01,328 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 72 flow. Second operand 11 states and 136 transitions. [2023-11-17 12:32:01,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 70 transitions, 344 flow [2023-11-17 12:32:01,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 70 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 12:32:01,331 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 126 flow [2023-11-17 12:32:01,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=126, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-17 12:32:01,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-17 12:32:01,332 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 126 flow [2023-11-17 12:32:01,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 16 states have internal predecessors, (139), 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 12:32:01,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:01,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:01,343 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 12:32:01,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:01,542 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 12:32:01,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash -617027267, now seen corresponding path program 2 times [2023-11-17 12:32:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:01,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783104197] [2023-11-17 12:32:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:01,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:01,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783104197] [2023-11-17 12:32:01,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783104197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:01,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540886836] [2023-11-17 12:32:01,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:32:01,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:01,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:01,629 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 12:32:01,648 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 12:32:01,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:32:01,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:01,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:32:01,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:01,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:01,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540886836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:01,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:01,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 12:32:01,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826008949] [2023-11-17 12:32:01,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:01,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:32:01,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:32:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:32:01,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:32:01,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 126 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 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 12:32:01,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:32:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:01,895 INFO L124 PetriNetUnfolderBase]: 113/232 cut-off events. [2023-11-17 12:32:01,895 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 12:32:01,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 232 events. 113/232 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 896 event pairs, 42 based on Foata normal form. 10/239 useless extension candidates. Maximal degree in co-relation 359. Up to 95 conditions per place. [2023-11-17 12:32:01,896 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 18 selfloop transitions, 4 changer transitions 31/54 dead transitions. [2023-11-17 12:32:01,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 300 flow [2023-11-17 12:32:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:32:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:32:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2023-11-17 12:32:01,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.294811320754717 [2023-11-17 12:32:01,897 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 125 transitions. [2023-11-17 12:32:01,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 125 transitions. [2023-11-17 12:32:01,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:01,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 125 transitions. [2023-11-17 12:32:01,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 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 12:32:01,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:01,898 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:01,898 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 126 flow. Second operand 8 states and 125 transitions. [2023-11-17 12:32:01,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 300 flow [2023-11-17 12:32:01,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 282 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 12:32:01,900 INFO L231 Difference]: Finished difference. Result has 39 places, 22 transitions, 98 flow [2023-11-17 12:32:01,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=22} [2023-11-17 12:32:01,901 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-11-17 12:32:01,901 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 22 transitions, 98 flow [2023-11-17 12:32:01,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 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 12:32:01,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:01,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:01,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:02,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:02,107 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 12:32:02,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1801158973, now seen corresponding path program 3 times [2023-11-17 12:32:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:02,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993375142] [2023-11-17 12:32:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:02,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:32:02,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993375142] [2023-11-17 12:32:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993375142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885887895] [2023-11-17 12:32:02,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:32:02,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:02,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:02,178 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 12:32:02,181 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 12:32:02,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:32:02,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:02,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:32:02,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:02,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2023-11-17 12:32:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:32:02,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:32:02,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885887895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:32:02,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:32:02,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-17 12:32:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462308101] [2023-11-17 12:32:02,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:32:02,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:32:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:02,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:32:02,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:32:02,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:32:02,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 22 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 12:32:02,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:02,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:32:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:02,388 INFO L124 PetriNetUnfolderBase]: 142/277 cut-off events. [2023-11-17 12:32:02,388 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-11-17 12:32:02,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 277 events. 142/277 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1012 event pairs, 35 based on Foata normal form. 8/283 useless extension candidates. Maximal degree in co-relation 728. Up to 107 conditions per place. [2023-11-17 12:32:02,390 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 34 selfloop transitions, 7 changer transitions 5/47 dead transitions. [2023-11-17 12:32:02,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 276 flow [2023-11-17 12:32:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:32:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:32:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2023-11-17 12:32:02,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32452830188679244 [2023-11-17 12:32:02,391 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 86 transitions. [2023-11-17 12:32:02,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 86 transitions. [2023-11-17 12:32:02,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:02,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 86 transitions. [2023-11-17 12:32:02,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 12:32:02,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 12:32:02,392 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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 12:32:02,392 INFO L175 Difference]: Start difference. First operand has 39 places, 22 transitions, 98 flow. Second operand 5 states and 86 transitions. [2023-11-17 12:32:02,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 276 flow [2023-11-17 12:32:02,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 266 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-17 12:32:02,396 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 156 flow [2023-11-17 12:32:02,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-17 12:32:02,397 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-11-17 12:32:02,398 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 156 flow [2023-11-17 12:32:02,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 12:32:02,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:02,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:02,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 12:32:02,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:02,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:02,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1181551450, now seen corresponding path program 4 times [2023-11-17 12:32:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:02,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916206758] [2023-11-17 12:32:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:03,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:03,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916206758] [2023-11-17 12:32:03,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916206758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:03,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499935451] [2023-11-17 12:32:03,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:32:03,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:03,471 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 12:32:03,473 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 12:32:03,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:32:03,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:03,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:32:03,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:03,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:04,087 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 12:32:04,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 206 treesize of output 176 [2023-11-17 12:32:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499935451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:04,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:04,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-11-17 12:32:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273947004] [2023-11-17 12:32:04,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:04,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:32:04,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:32:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:32:04,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:04,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 156 flow. Second operand has 28 states, 28 states have (on average 7.857142857142857) internal successors, (220), 28 states have internal predecessors, (220), 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 12:32:04,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:04,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:04,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:07,414 INFO L124 PetriNetUnfolderBase]: 687/1292 cut-off events. [2023-11-17 12:32:07,414 INFO L125 PetriNetUnfolderBase]: For 1658/1658 co-relation queries the response was YES. [2023-11-17 12:32:07,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1292 events. 687/1292 cut-off events. For 1658/1658 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6778 event pairs, 62 based on Foata normal form. 33/1322 useless extension candidates. Maximal degree in co-relation 2998. Up to 277 conditions per place. [2023-11-17 12:32:07,418 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 85 selfloop transitions, 61 changer transitions 132/279 dead transitions. [2023-11-17 12:32:07,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 279 transitions, 1729 flow [2023-11-17 12:32:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:32:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:32:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 503 transitions. [2023-11-17 12:32:07,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2636268343815514 [2023-11-17 12:32:07,420 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 503 transitions. [2023-11-17 12:32:07,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 503 transitions. [2023-11-17 12:32:07,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:07,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 503 transitions. [2023-11-17 12:32:07,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 13.972222222222221) internal successors, (503), 36 states have internal predecessors, (503), 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 12:32:07,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 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 12:32:07,424 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 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 12:32:07,424 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 156 flow. Second operand 36 states and 503 transitions. [2023-11-17 12:32:07,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 279 transitions, 1729 flow [2023-11-17 12:32:07,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 279 transitions, 1690 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-17 12:32:07,429 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 972 flow [2023-11-17 12:32:07,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=972, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-11-17 12:32:07,429 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-11-17 12:32:07,429 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 972 flow [2023-11-17 12:32:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.857142857142857) internal successors, (220), 28 states have internal predecessors, (220), 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 12:32:07,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:07,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:07,436 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 12:32:07,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:07,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:07,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2016292700, now seen corresponding path program 5 times [2023-11-17 12:32:07,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:07,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567784008] [2023-11-17 12:32:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:07,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:08,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:08,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567784008] [2023-11-17 12:32:08,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567784008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:08,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669442114] [2023-11-17 12:32:08,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:32:08,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:08,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:08,354 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 12:32:08,377 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 12:32:08,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:32:08,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:08,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 12:32:08,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:32:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:32:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:32:08,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:32:08,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 20 [2023-11-17 12:32:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:08,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:09,085 INFO L349 Elim1Store]: treesize reduction 8, result has 93.2 percent of original size [2023-11-17 12:32:09,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 219 treesize of output 261 [2023-11-17 12:32:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:16,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669442114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:16,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:16,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-11-17 12:32:16,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85014891] [2023-11-17 12:32:16,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:16,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:32:16,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:16,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:32:16,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:32:16,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:16,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 972 flow. Second operand has 28 states, 28 states have (on average 7.857142857142857) internal successors, (220), 28 states have internal predecessors, (220), 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 12:32:16,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:16,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:16,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:17,565 INFO L124 PetriNetUnfolderBase]: 1167/2177 cut-off events. [2023-11-17 12:32:17,565 INFO L125 PetriNetUnfolderBase]: For 9404/9404 co-relation queries the response was YES. [2023-11-17 12:32:17,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7942 conditions, 2177 events. 1167/2177 cut-off events. For 9404/9404 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13106 event pairs, 288 based on Foata normal form. 11/2186 useless extension candidates. Maximal degree in co-relation 7583. Up to 900 conditions per place. [2023-11-17 12:32:17,575 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 136 selfloop transitions, 61 changer transitions 51/249 dead transitions. [2023-11-17 12:32:17,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 249 transitions, 2583 flow [2023-11-17 12:32:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:32:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:32:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 265 transitions. [2023-11-17 12:32:17,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25 [2023-11-17 12:32:17,576 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 265 transitions. [2023-11-17 12:32:17,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 265 transitions. [2023-11-17 12:32:17,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:17,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 265 transitions. [2023-11-17 12:32:17,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 13.25) internal successors, (265), 20 states have internal predecessors, (265), 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 12:32:17,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 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 12:32:17,578 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 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 12:32:17,578 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 972 flow. Second operand 20 states and 265 transitions. [2023-11-17 12:32:17,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 249 transitions, 2583 flow [2023-11-17 12:32:17,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 249 transitions, 1912 flow, removed 332 selfloop flow, removed 4 redundant places. [2023-11-17 12:32:17,604 INFO L231 Difference]: Finished difference. Result has 114 places, 130 transitions, 1170 flow [2023-11-17 12:32:17,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1170, PETRI_PLACES=114, PETRI_TRANSITIONS=130} [2023-11-17 12:32:17,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-11-17 12:32:17,606 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 130 transitions, 1170 flow [2023-11-17 12:32:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.857142857142857) internal successors, (220), 28 states have internal predecessors, (220), 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 12:32:17,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:17,607 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:17,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 12:32:17,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:17,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:17,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash -131947004, now seen corresponding path program 6 times [2023-11-17 12:32:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019153536] [2023-11-17 12:32:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019153536] [2023-11-17 12:32:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019153536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914645456] [2023-11-17 12:32:18,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:32:18,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:18,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:18,834 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:32:18,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:32:18,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:18,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 12:32:18,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:32:19,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:19,346 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-17 12:32:19,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 162 [2023-11-17 12:32:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:19,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914645456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:19,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:19,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 22 [2023-11-17 12:32:19,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105212531] [2023-11-17 12:32:19,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:19,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:32:19,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:32:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:32:19,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:19,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 130 transitions, 1170 flow. Second operand has 24 states, 24 states have (on average 8.166666666666666) internal successors, (196), 24 states have internal predecessors, (196), 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 12:32:19,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:19,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:19,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:20,507 INFO L124 PetriNetUnfolderBase]: 1476/2759 cut-off events. [2023-11-17 12:32:20,507 INFO L125 PetriNetUnfolderBase]: For 9435/9435 co-relation queries the response was YES. [2023-11-17 12:32:20,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 2759 events. 1476/2759 cut-off events. For 9435/9435 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17559 event pairs, 337 based on Foata normal form. 7/2762 useless extension candidates. Maximal degree in co-relation 8719. Up to 1365 conditions per place. [2023-11-17 12:32:20,521 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 138 selfloop transitions, 67 changer transitions 68/274 dead transitions. [2023-11-17 12:32:20,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 274 transitions, 2422 flow [2023-11-17 12:32:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:32:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:32:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 277 transitions. [2023-11-17 12:32:20,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23756432246998285 [2023-11-17 12:32:20,523 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 277 transitions. [2023-11-17 12:32:20,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 277 transitions. [2023-11-17 12:32:20,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:20,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 277 transitions. [2023-11-17 12:32:20,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 12.590909090909092) internal successors, (277), 22 states have internal predecessors, (277), 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 12:32:20,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 53.0) internal successors, (1219), 23 states have internal predecessors, (1219), 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 12:32:20,527 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 53.0) internal successors, (1219), 23 states have internal predecessors, (1219), 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 12:32:20,527 INFO L175 Difference]: Start difference. First operand has 114 places, 130 transitions, 1170 flow. Second operand 22 states and 277 transitions. [2023-11-17 12:32:20,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 274 transitions, 2422 flow [2023-11-17 12:32:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 274 transitions, 2314 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-11-17 12:32:20,562 INFO L231 Difference]: Finished difference. Result has 132 places, 157 transitions, 1582 flow [2023-11-17 12:32:20,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1582, PETRI_PLACES=132, PETRI_TRANSITIONS=157} [2023-11-17 12:32:20,563 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2023-11-17 12:32:20,563 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 157 transitions, 1582 flow [2023-11-17 12:32:20,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.166666666666666) internal successors, (196), 24 states have internal predecessors, (196), 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 12:32:20,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:20,565 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:20,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 12:32:20,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:20,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:20,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 907713431, now seen corresponding path program 7 times [2023-11-17 12:32:20,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:20,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498395215] [2023-11-17 12:32:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:20,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498395215] [2023-11-17 12:32:20,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498395215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:20,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182398668] [2023-11-17 12:32:20,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:32:20,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:20,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:20,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:20,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:32:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:20,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:32:20,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:21,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:32:21,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 118 [2023-11-17 12:32:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:21,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:21,214 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 12:32:21,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 137 [2023-11-17 12:32:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:21,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182398668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:21,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:21,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-17 12:32:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465859981] [2023-11-17 12:32:21,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:32:21,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:32:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:32:21,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:21,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 157 transitions, 1582 flow. Second operand has 15 states, 15 states have (on average 9.133333333333333) internal successors, (137), 15 states have internal predecessors, (137), 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 12:32:21,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:21,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:21,911 INFO L124 PetriNetUnfolderBase]: 2526/4729 cut-off events. [2023-11-17 12:32:21,911 INFO L125 PetriNetUnfolderBase]: For 19197/19197 co-relation queries the response was YES. [2023-11-17 12:32:21,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16379 conditions, 4729 events. 2526/4729 cut-off events. For 19197/19197 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 32993 event pairs, 473 based on Foata normal form. 64/4788 useless extension candidates. Maximal degree in co-relation 15650. Up to 1839 conditions per place. [2023-11-17 12:32:21,934 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 145 selfloop transitions, 146 changer transitions 15/307 dead transitions. [2023-11-17 12:32:21,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 307 transitions, 3550 flow [2023-11-17 12:32:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:32:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:32:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2023-11-17 12:32:21,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.269811320754717 [2023-11-17 12:32:21,936 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 143 transitions. [2023-11-17 12:32:21,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 143 transitions. [2023-11-17 12:32:21,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:21,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 143 transitions. [2023-11-17 12:32:21,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 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 12:32:21,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 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 12:32:21,937 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 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 12:32:21,937 INFO L175 Difference]: Start difference. First operand has 132 places, 157 transitions, 1582 flow. Second operand 10 states and 143 transitions. [2023-11-17 12:32:21,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 307 transitions, 3550 flow [2023-11-17 12:32:21,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 307 transitions, 3370 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-11-17 12:32:22,004 INFO L231 Difference]: Finished difference. Result has 139 places, 254 transitions, 3025 flow [2023-11-17 12:32:22,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3025, PETRI_PLACES=139, PETRI_TRANSITIONS=254} [2023-11-17 12:32:22,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-11-17 12:32:22,005 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 254 transitions, 3025 flow [2023-11-17 12:32:22,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.133333333333333) internal successors, (137), 15 states have internal predecessors, (137), 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 12:32:22,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:22,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:22,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:22,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:22,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:22,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2113902071, now seen corresponding path program 8 times [2023-11-17 12:32:22,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:22,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250125740] [2023-11-17 12:32:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:22,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250125740] [2023-11-17 12:32:22,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250125740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:22,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803694394] [2023-11-17 12:32:22,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:32:22,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:22,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:22,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:22,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:32:23,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:32:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:23,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 12:32:23,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:23,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:23,735 INFO L349 Elim1Store]: treesize reduction 18, result has 75.3 percent of original size [2023-11-17 12:32:23,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 214 [2023-11-17 12:32:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:25,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803694394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:25,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:25,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-11-17 12:32:25,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489193741] [2023-11-17 12:32:25,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:25,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:32:25,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:25,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:32:25,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:32:25,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:25,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 254 transitions, 3025 flow. Second operand has 34 states, 34 states have (on average 7.705882352941177) internal successors, (262), 34 states have internal predecessors, (262), 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 12:32:25,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:25,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:25,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:27,855 INFO L124 PetriNetUnfolderBase]: 3697/6881 cut-off events. [2023-11-17 12:32:27,856 INFO L125 PetriNetUnfolderBase]: For 39045/39045 co-relation queries the response was YES. [2023-11-17 12:32:27,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27270 conditions, 6881 events. 3697/6881 cut-off events. For 39045/39045 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 52363 event pairs, 1099 based on Foata normal form. 23/6902 useless extension candidates. Maximal degree in co-relation 26375. Up to 3960 conditions per place. [2023-11-17 12:32:27,887 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 333 selfloop transitions, 151 changer transitions 122/607 dead transitions. [2023-11-17 12:32:27,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 607 transitions, 6993 flow [2023-11-17 12:32:27,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 12:32:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 12:32:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 548 transitions. [2023-11-17 12:32:27,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25218591808559593 [2023-11-17 12:32:27,889 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 548 transitions. [2023-11-17 12:32:27,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 548 transitions. [2023-11-17 12:32:27,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:27,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 548 transitions. [2023-11-17 12:32:27,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 13.365853658536585) internal successors, (548), 41 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:27,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 53.0) internal successors, (2226), 42 states have internal predecessors, (2226), 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 12:32:27,895 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 53.0) internal successors, (2226), 42 states have internal predecessors, (2226), 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 12:32:27,895 INFO L175 Difference]: Start difference. First operand has 139 places, 254 transitions, 3025 flow. Second operand 41 states and 548 transitions. [2023-11-17 12:32:27,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 607 transitions, 6993 flow [2023-11-17 12:32:28,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 607 transitions, 6818 flow, removed 78 selfloop flow, removed 3 redundant places. [2023-11-17 12:32:28,043 INFO L231 Difference]: Finished difference. Result has 201 places, 364 transitions, 5126 flow [2023-11-17 12:32:28,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5126, PETRI_PLACES=201, PETRI_TRANSITIONS=364} [2023-11-17 12:32:28,044 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2023-11-17 12:32:28,044 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 364 transitions, 5126 flow [2023-11-17 12:32:28,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.705882352941177) internal successors, (262), 34 states have internal predecessors, (262), 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 12:32:28,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:28,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:28,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:28,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 12:32:28,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:28,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1175611694, now seen corresponding path program 9 times [2023-11-17 12:32:28,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:28,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001944030] [2023-11-17 12:32:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:28,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:29,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001944030] [2023-11-17 12:32:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001944030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700951186] [2023-11-17 12:32:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:32:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:29,469 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:29,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:32:29,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:32:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:29,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:32:29,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:29,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:30,457 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-11-17 12:32:30,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 254 treesize of output 236 [2023-11-17 12:32:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700951186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:31,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-11-17 12:32:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990765653] [2023-11-17 12:32:31,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:31,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 12:32:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 12:32:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2023-11-17 12:32:31,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:31,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 364 transitions, 5126 flow. Second operand has 38 states, 38 states have (on average 7.578947368421052) internal successors, (288), 38 states have internal predecessors, (288), 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 12:32:31,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:31,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:31,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:39,699 INFO L124 PetriNetUnfolderBase]: 4253/7962 cut-off events. [2023-11-17 12:32:39,699 INFO L125 PetriNetUnfolderBase]: For 124879/124879 co-relation queries the response was YES. [2023-11-17 12:32:39,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38183 conditions, 7962 events. 4253/7962 cut-off events. For 124879/124879 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 61651 event pairs, 339 based on Foata normal form. 84/8044 useless extension candidates. Maximal degree in co-relation 36852. Up to 2173 conditions per place. [2023-11-17 12:32:39,744 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 299 selfloop transitions, 302 changer transitions 219/821 dead transitions. [2023-11-17 12:32:39,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 821 transitions, 11213 flow [2023-11-17 12:32:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-17 12:32:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-11-17 12:32:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 888 transitions. [2023-11-17 12:32:39,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2577648766328012 [2023-11-17 12:32:39,747 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 888 transitions. [2023-11-17 12:32:39,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 888 transitions. [2023-11-17 12:32:39,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:39,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 888 transitions. [2023-11-17 12:32:39,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 13.661538461538461) internal successors, (888), 65 states have internal predecessors, (888), 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 12:32:39,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 53.0) internal successors, (3498), 66 states have internal predecessors, (3498), 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 12:32:39,753 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 53.0) internal successors, (3498), 66 states have internal predecessors, (3498), 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 12:32:39,753 INFO L175 Difference]: Start difference. First operand has 201 places, 364 transitions, 5126 flow. Second operand 65 states and 888 transitions. [2023-11-17 12:32:39,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 821 transitions, 11213 flow [2023-11-17 12:32:39,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 821 transitions, 9673 flow, removed 657 selfloop flow, removed 33 redundant places. [2023-11-17 12:32:39,990 INFO L231 Difference]: Finished difference. Result has 244 places, 386 transitions, 6598 flow [2023-11-17 12:32:39,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=6598, PETRI_PLACES=244, PETRI_TRANSITIONS=386} [2023-11-17 12:32:39,990 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2023-11-17 12:32:39,990 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 386 transitions, 6598 flow [2023-11-17 12:32:39,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.578947368421052) internal successors, (288), 38 states have internal predecessors, (288), 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 12:32:39,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:39,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:39,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 12:32:40,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:40,197 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:40,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 69994493, now seen corresponding path program 10 times [2023-11-17 12:32:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654296815] [2023-11-17 12:32:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:40,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654296815] [2023-11-17 12:32:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654296815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254039438] [2023-11-17 12:32:40,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:32:40,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:40,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:40,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:40,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:32:40,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:32:40,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:40,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-17 12:32:40,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:40,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254039438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:40,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-17 12:32:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092985748] [2023-11-17 12:32:40,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:40,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:32:40,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:32:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:32:40,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:32:40,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 386 transitions, 6598 flow. Second operand has 24 states, 24 states have (on average 10.625) internal successors, (255), 24 states have internal predecessors, (255), 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 12:32:40,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:40,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:32:40,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:41,528 INFO L124 PetriNetUnfolderBase]: 2303/4439 cut-off events. [2023-11-17 12:32:41,529 INFO L125 PetriNetUnfolderBase]: For 49288/49288 co-relation queries the response was YES. [2023-11-17 12:32:41,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20752 conditions, 4439 events. 2303/4439 cut-off events. For 49288/49288 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32554 event pairs, 875 based on Foata normal form. 188/4626 useless extension candidates. Maximal degree in co-relation 20646. Up to 1580 conditions per place. [2023-11-17 12:32:41,554 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 128 selfloop transitions, 16 changer transitions 119/264 dead transitions. [2023-11-17 12:32:41,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 264 transitions, 4210 flow [2023-11-17 12:32:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:32:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:32:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2023-11-17 12:32:41,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28459119496855345 [2023-11-17 12:32:41,555 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 181 transitions. [2023-11-17 12:32:41,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 181 transitions. [2023-11-17 12:32:41,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:41,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 181 transitions. [2023-11-17 12:32:41,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 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 12:32:41,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 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 12:32:41,556 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 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 12:32:41,556 INFO L175 Difference]: Start difference. First operand has 244 places, 386 transitions, 6598 flow. Second operand 12 states and 181 transitions. [2023-11-17 12:32:41,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 264 transitions, 4210 flow [2023-11-17 12:32:41,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 264 transitions, 3570 flow, removed 234 selfloop flow, removed 51 redundant places. [2023-11-17 12:32:41,876 INFO L231 Difference]: Finished difference. Result has 180 places, 126 transitions, 1602 flow [2023-11-17 12:32:41,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2601, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1602, PETRI_PLACES=180, PETRI_TRANSITIONS=126} [2023-11-17 12:32:41,876 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-11-17 12:32:41,877 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 126 transitions, 1602 flow [2023-11-17 12:32:41,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.625) internal successors, (255), 24 states have internal predecessors, (255), 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 12:32:41,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:41,877 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:41,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:42,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 12:32:42,077 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:42,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash 342316090, now seen corresponding path program 11 times [2023-11-17 12:32:42,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:42,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731339951] [2023-11-17 12:32:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:32:42,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:42,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731339951] [2023-11-17 12:32:42,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731339951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:42,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822749612] [2023-11-17 12:32:42,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:32:42,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:42,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:42,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:42,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:32:42,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:32:42,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:42,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:32:42,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:32:42,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:32:42,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822749612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:42,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:42,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-17 12:32:42,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991610952] [2023-11-17 12:32:42,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:32:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:32:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:32:42,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2023-11-17 12:32:42,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 126 transitions, 1602 flow. Second operand has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 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 12:32:42,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:42,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2023-11-17 12:32:42,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:42,832 INFO L124 PetriNetUnfolderBase]: 1101/2117 cut-off events. [2023-11-17 12:32:42,832 INFO L125 PetriNetUnfolderBase]: For 13035/13035 co-relation queries the response was YES. [2023-11-17 12:32:42,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 2117 events. 1101/2117 cut-off events. For 13035/13035 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13178 event pairs, 801 based on Foata normal form. 4/2120 useless extension candidates. Maximal degree in co-relation 9022. Up to 1896 conditions per place. [2023-11-17 12:32:42,842 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 109 selfloop transitions, 4 changer transitions 31/145 dead transitions. [2023-11-17 12:32:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 145 transitions, 1927 flow [2023-11-17 12:32:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:32:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:32:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2023-11-17 12:32:42,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2806603773584906 [2023-11-17 12:32:42,854 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 119 transitions. [2023-11-17 12:32:42,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 119 transitions. [2023-11-17 12:32:42,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:42,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 119 transitions. [2023-11-17 12:32:42,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 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 12:32:42,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:42,855 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:42,855 INFO L175 Difference]: Start difference. First operand has 180 places, 126 transitions, 1602 flow. Second operand 8 states and 119 transitions. [2023-11-17 12:32:42,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 145 transitions, 1927 flow [2023-11-17 12:32:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 145 transitions, 1643 flow, removed 117 selfloop flow, removed 35 redundant places. [2023-11-17 12:32:42,907 INFO L231 Difference]: Finished difference. Result has 117 places, 114 transitions, 1212 flow [2023-11-17 12:32:42,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1212, PETRI_PLACES=117, PETRI_TRANSITIONS=114} [2023-11-17 12:32:42,908 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-11-17 12:32:42,908 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 114 transitions, 1212 flow [2023-11-17 12:32:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 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 12:32:42,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:42,908 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:42,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 12:32:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:32:43,113 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:43,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash -984324932, now seen corresponding path program 12 times [2023-11-17 12:32:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:43,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424102905] [2023-11-17 12:32:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:44,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424102905] [2023-11-17 12:32:44,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424102905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370200071] [2023-11-17 12:32:44,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:32:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:44,630 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:44,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:32:44,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:32:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:44,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 12:32:44,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:45,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:45,553 INFO L349 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-11-17 12:32:45,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 248 treesize of output 204 [2023-11-17 12:32:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:32:46,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370200071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:46,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:46,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 32 [2023-11-17 12:32:46,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903065605] [2023-11-17 12:32:46,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:46,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:32:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:32:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:32:46,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:46,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 114 transitions, 1212 flow. Second operand has 34 states, 34 states have (on average 7.794117647058823) internal successors, (265), 34 states have internal predecessors, (265), 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 12:32:46,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:46,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:46,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:48,511 INFO L124 PetriNetUnfolderBase]: 2364/4401 cut-off events. [2023-11-17 12:32:48,512 INFO L125 PetriNetUnfolderBase]: For 19013/19013 co-relation queries the response was YES. [2023-11-17 12:32:48,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18132 conditions, 4401 events. 2364/4401 cut-off events. For 19013/19013 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 29865 event pairs, 225 based on Foata normal form. 49/4449 useless extension candidates. Maximal degree in co-relation 18092. Up to 1009 conditions per place. [2023-11-17 12:32:48,527 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 121 selfloop transitions, 171 changer transitions 150/443 dead transitions. [2023-11-17 12:32:48,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 443 transitions, 4667 flow [2023-11-17 12:32:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:32:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:32:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 538 transitions. [2023-11-17 12:32:48,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2537735849056604 [2023-11-17 12:32:48,544 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 538 transitions. [2023-11-17 12:32:48,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 538 transitions. [2023-11-17 12:32:48,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:48,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 538 transitions. [2023-11-17 12:32:48,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 13.45) internal successors, (538), 40 states have internal predecessors, (538), 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 12:32:48,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 53.0) internal successors, (2173), 41 states have internal predecessors, (2173), 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 12:32:48,552 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 53.0) internal successors, (2173), 41 states have internal predecessors, (2173), 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 12:32:48,552 INFO L175 Difference]: Start difference. First operand has 117 places, 114 transitions, 1212 flow. Second operand 40 states and 538 transitions. [2023-11-17 12:32:48,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 443 transitions, 4667 flow [2023-11-17 12:32:48,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 443 transitions, 4455 flow, removed 97 selfloop flow, removed 9 redundant places. [2023-11-17 12:32:48,617 INFO L231 Difference]: Finished difference. Result has 163 places, 215 transitions, 3423 flow [2023-11-17 12:32:48,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3423, PETRI_PLACES=163, PETRI_TRANSITIONS=215} [2023-11-17 12:32:48,617 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-11-17 12:32:48,617 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 215 transitions, 3423 flow [2023-11-17 12:32:48,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.794117647058823) internal successors, (265), 34 states have internal predecessors, (265), 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 12:32:48,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:48,618 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:48,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 12:32:48,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:32:48,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:48,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:48,823 INFO L85 PathProgramCache]: Analyzing trace with hash 312160854, now seen corresponding path program 13 times [2023-11-17 12:32:48,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:48,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888278950] [2023-11-17 12:32:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:48,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:49,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888278950] [2023-11-17 12:32:49,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888278950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:49,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157085730] [2023-11-17 12:32:49,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:32:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:49,997 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:49,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:32:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:50,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:32:50,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:50,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:50,899 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-11-17 12:32:50,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 254 treesize of output 236 [2023-11-17 12:32:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:32:51,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157085730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:51,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:51,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 32 [2023-11-17 12:32:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365316539] [2023-11-17 12:32:51,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:51,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:32:51,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:32:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 12:32:51,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:51,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 215 transitions, 3423 flow. Second operand has 34 states, 34 states have (on average 7.794117647058823) internal successors, (265), 34 states have internal predecessors, (265), 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 12:32:51,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:51,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:54,056 INFO L124 PetriNetUnfolderBase]: 3235/5962 cut-off events. [2023-11-17 12:32:54,056 INFO L125 PetriNetUnfolderBase]: For 69540/69540 co-relation queries the response was YES. [2023-11-17 12:32:54,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28751 conditions, 5962 events. 3235/5962 cut-off events. For 69540/69540 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 43011 event pairs, 642 based on Foata normal form. 35/5997 useless extension candidates. Maximal degree in co-relation 28687. Up to 2031 conditions per place. [2023-11-17 12:32:54,088 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 214 selfloop transitions, 171 changer transitions 124/510 dead transitions. [2023-11-17 12:32:54,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 510 transitions, 7003 flow [2023-11-17 12:32:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:32:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:32:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 480 transitions. [2023-11-17 12:32:54,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25157232704402516 [2023-11-17 12:32:54,090 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 480 transitions. [2023-11-17 12:32:54,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 480 transitions. [2023-11-17 12:32:54,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:54,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 480 transitions. [2023-11-17 12:32:54,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 13.333333333333334) internal successors, (480), 36 states have internal predecessors, (480), 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 12:32:54,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 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 12:32:54,093 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 53.0) internal successors, (1961), 37 states have internal predecessors, (1961), 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 12:32:54,093 INFO L175 Difference]: Start difference. First operand has 163 places, 215 transitions, 3423 flow. Second operand 36 states and 480 transitions. [2023-11-17 12:32:54,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 510 transitions, 7003 flow [2023-11-17 12:32:54,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 510 transitions, 6089 flow, removed 405 selfloop flow, removed 14 redundant places. [2023-11-17 12:32:54,403 INFO L231 Difference]: Finished difference. Result has 188 places, 290 transitions, 4629 flow [2023-11-17 12:32:54,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4629, PETRI_PLACES=188, PETRI_TRANSITIONS=290} [2023-11-17 12:32:54,404 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-11-17 12:32:54,404 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 290 transitions, 4629 flow [2023-11-17 12:32:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.794117647058823) internal successors, (265), 34 states have internal predecessors, (265), 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 12:32:54,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:54,404 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:54,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:54,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:32:54,609 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:32:54,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1596433558, now seen corresponding path program 14 times [2023-11-17 12:32:54,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:54,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214979152] [2023-11-17 12:32:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:55,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214979152] [2023-11-17 12:32:55,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214979152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:55,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081932720] [2023-11-17 12:32:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:32:55,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:55,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:55,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:55,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:32:55,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:32:55,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:55,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:32:55,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:32:56,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:56,602 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-11-17 12:32:56,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 254 treesize of output 236 [2023-11-17 12:32:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:32:57,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081932720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:57,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:57,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 29 [2023-11-17 12:32:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616955321] [2023-11-17 12:32:57,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:57,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 12:32:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 12:32:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-11-17 12:32:57,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:32:57,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 290 transitions, 4629 flow. Second operand has 31 states, 31 states have (on average 7.903225806451613) internal successors, (245), 31 states have internal predecessors, (245), 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 12:32:57,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:57,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:32:57,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:32:59,770 INFO L124 PetriNetUnfolderBase]: 3615/6654 cut-off events. [2023-11-17 12:32:59,770 INFO L125 PetriNetUnfolderBase]: For 68009/68009 co-relation queries the response was YES. [2023-11-17 12:32:59,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32371 conditions, 6654 events. 3615/6654 cut-off events. For 68009/68009 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 48978 event pairs, 1058 based on Foata normal form. 2/6655 useless extension candidates. Maximal degree in co-relation 32296. Up to 3622 conditions per place. [2023-11-17 12:32:59,807 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 254 selfloop transitions, 128 changer transitions 114/497 dead transitions. [2023-11-17 12:32:59,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 497 transitions, 6909 flow [2023-11-17 12:32:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:32:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:32:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 427 transitions. [2023-11-17 12:32:59,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2369589345172031 [2023-11-17 12:32:59,809 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 427 transitions. [2023-11-17 12:32:59,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 427 transitions. [2023-11-17 12:32:59,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:32:59,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 427 transitions. [2023-11-17 12:32:59,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 12.558823529411764) internal successors, (427), 34 states have internal predecessors, (427), 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 12:32:59,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 53.0) internal successors, (1855), 35 states have internal predecessors, (1855), 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 12:32:59,812 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 53.0) internal successors, (1855), 35 states have internal predecessors, (1855), 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 12:32:59,812 INFO L175 Difference]: Start difference. First operand has 188 places, 290 transitions, 4629 flow. Second operand 34 states and 427 transitions. [2023-11-17 12:32:59,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 497 transitions, 6909 flow [2023-11-17 12:33:00,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 497 transitions, 6625 flow, removed 132 selfloop flow, removed 9 redundant places. [2023-11-17 12:33:00,186 INFO L231 Difference]: Finished difference. Result has 218 places, 316 transitions, 5208 flow [2023-11-17 12:33:00,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5208, PETRI_PLACES=218, PETRI_TRANSITIONS=316} [2023-11-17 12:33:00,186 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-11-17 12:33:00,186 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 316 transitions, 5208 flow [2023-11-17 12:33:00,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.903225806451613) internal successors, (245), 31 states have internal predecessors, (245), 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 12:33:00,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:00,187 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:00,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:33:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:00,397 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:33:00,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2118968967, now seen corresponding path program 15 times [2023-11-17 12:33:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952498422] [2023-11-17 12:33:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:00,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:33:00,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952498422] [2023-11-17 12:33:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952498422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271805999] [2023-11-17 12:33:00,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:33:00,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:00,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:00,495 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:33:00,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:33:00,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:33:00,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:00,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:33:00,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:00,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:33:00,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 126 [2023-11-17 12:33:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:33:00,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:01,171 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-11-17 12:33:01,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 147 [2023-11-17 12:33:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 12:33:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271805999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:01,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:01,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-11-17 12:33:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492112307] [2023-11-17 12:33:01,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:33:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:33:01,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:33:01,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:33:01,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 316 transitions, 5208 flow. Second operand has 20 states, 20 states have (on average 8.65) internal successors, (173), 20 states have internal predecessors, (173), 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 12:33:01,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:01,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:33:01,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:03,256 INFO L124 PetriNetUnfolderBase]: 5563/10210 cut-off events. [2023-11-17 12:33:03,256 INFO L125 PetriNetUnfolderBase]: For 124825/124825 co-relation queries the response was YES. [2023-11-17 12:33:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52476 conditions, 10210 events. 5563/10210 cut-off events. For 124825/124825 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 81152 event pairs, 950 based on Foata normal form. 20/10228 useless extension candidates. Maximal degree in co-relation 52394. Up to 3548 conditions per place. [2023-11-17 12:33:03,307 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 219 selfloop transitions, 312 changer transitions 30/562 dead transitions. [2023-11-17 12:33:03,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 562 transitions, 10191 flow [2023-11-17 12:33:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:33:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:33:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 244 transitions. [2023-11-17 12:33:03,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27081021087680357 [2023-11-17 12:33:03,309 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 244 transitions. [2023-11-17 12:33:03,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 244 transitions. [2023-11-17 12:33:03,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:03,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 244 transitions. [2023-11-17 12:33:03,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 14.352941176470589) internal successors, (244), 17 states have internal predecessors, (244), 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 12:33:03,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 53.0) internal successors, (954), 18 states have internal predecessors, (954), 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 12:33:03,310 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 53.0) internal successors, (954), 18 states have internal predecessors, (954), 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 12:33:03,310 INFO L175 Difference]: Start difference. First operand has 218 places, 316 transitions, 5208 flow. Second operand 17 states and 244 transitions. [2023-11-17 12:33:03,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 562 transitions, 10191 flow [2023-11-17 12:33:03,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 562 transitions, 10055 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-11-17 12:33:03,681 INFO L231 Difference]: Finished difference. Result has 219 places, 463 transitions, 8760 flow [2023-11-17 12:33:03,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5112, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8760, PETRI_PLACES=219, PETRI_TRANSITIONS=463} [2023-11-17 12:33:03,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 198 predicate places. [2023-11-17 12:33:03,681 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 463 transitions, 8760 flow [2023-11-17 12:33:03,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.65) internal successors, (173), 20 states have internal predecessors, (173), 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 12:33:03,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:33:03,682 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:33:03,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:33:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:33:03,882 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:33:03,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:33:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash 663763028, now seen corresponding path program 16 times [2023-11-17 12:33:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:33:03,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334677922] [2023-11-17 12:33:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:33:03,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:33:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:33:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:05,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:33:05,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334677922] [2023-11-17 12:33:05,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334677922] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:33:05,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073580562] [2023-11-17 12:33:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:33:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:33:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:33:05,291 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:33:05,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:33:05,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:33:05,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:33:05,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 12:33:05,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:33:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:05,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:33:06,678 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-11-17 12:33:06,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 326 [2023-11-17 12:33:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:33:11,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073580562] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:33:11,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:33:11,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-11-17 12:33:11,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272478750] [2023-11-17 12:33:11,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:33:11,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 12:33:11,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:33:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 12:33:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2023-11-17 12:33:11,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:33:11,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 463 transitions, 8760 flow. Second operand has 46 states, 46 states have (on average 7.521739130434782) internal successors, (346), 46 states have internal predecessors, (346), 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 12:33:11,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:33:11,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:33:11,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:27,799 INFO L124 PetriNetUnfolderBase]: 14146/25919 cut-off events. [2023-11-17 12:34:27,800 INFO L125 PetriNetUnfolderBase]: For 827737/827737 co-relation queries the response was YES. [2023-11-17 12:34:27,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162686 conditions, 25919 events. 14146/25919 cut-off events. For 827737/827737 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 219568 event pairs, 2344 based on Foata normal form. 263/26181 useless extension candidates. Maximal degree in co-relation 162601. Up to 9173 conditions per place. [2023-11-17 12:34:27,972 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 2079 selfloop transitions, 1029 changer transitions 1439/4548 dead transitions. [2023-11-17 12:34:27,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 4548 transitions, 65646 flow [2023-11-17 12:34:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 493 states. [2023-11-17 12:34:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2023-11-17 12:34:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 7233 transitions. [2023-11-17 12:34:27,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27681886027019786 [2023-11-17 12:34:27,982 INFO L72 ComplementDD]: Start complementDD. Operand 493 states and 7233 transitions. [2023-11-17 12:34:27,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 493 states and 7233 transitions. [2023-11-17 12:34:27,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:34:27,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 493 states and 7233 transitions. [2023-11-17 12:34:27,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 494 states, 493 states have (on average 14.671399594320487) internal successors, (7233), 493 states have internal predecessors, (7233), 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 12:34:28,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 494 states, 494 states have (on average 53.0) internal successors, (26182), 494 states have internal predecessors, (26182), 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 12:34:28,015 INFO L81 ComplementDD]: Finished complementDD. Result has 494 states, 494 states have (on average 53.0) internal successors, (26182), 494 states have internal predecessors, (26182), 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 12:34:28,015 INFO L175 Difference]: Start difference. First operand has 219 places, 463 transitions, 8760 flow. Second operand 493 states and 7233 transitions. [2023-11-17 12:34:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 4548 transitions, 65646 flow [2023-11-17 12:34:29,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 4548 transitions, 65063 flow, removed 276 selfloop flow, removed 5 redundant places. [2023-11-17 12:34:29,587 INFO L231 Difference]: Finished difference. Result has 969 places, 1499 transitions, 38897 flow [2023-11-17 12:34:29,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=493, PETRI_FLOW=38897, PETRI_PLACES=969, PETRI_TRANSITIONS=1499} [2023-11-17 12:34:29,588 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 948 predicate places. [2023-11-17 12:34:29,588 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 1499 transitions, 38897 flow [2023-11-17 12:34:29,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 7.521739130434782) internal successors, (346), 46 states have internal predecessors, (346), 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 12:34:29,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:29,588 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:29,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:29,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:29,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:34:29,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash -387410020, now seen corresponding path program 17 times [2023-11-17 12:34:29,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:29,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979649209] [2023-11-17 12:34:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:29,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:31,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979649209] [2023-11-17 12:34:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979649209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814618526] [2023-11-17 12:34:31,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:34:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:31,113 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:31,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:34:31,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:34:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:31,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 12:34:31,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:31,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:32,531 INFO L349 Elim1Store]: treesize reduction 38, result has 79.0 percent of original size [2023-11-17 12:34:32,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 316 [2023-11-17 12:34:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814618526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:34,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:34,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-11-17 12:34:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232672790] [2023-11-17 12:34:34,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:34,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 12:34:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 12:34:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1706, Unknown=0, NotChecked=0, Total=2070 [2023-11-17 12:34:34,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2023-11-17 12:34:34,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1499 transitions, 38897 flow. Second operand has 46 states, 46 states have (on average 7.521739130434782) internal successors, (346), 46 states have internal predecessors, (346), 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 12:34:34,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:34,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2023-11-17 12:34:34,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:35:07,811 INFO L124 PetriNetUnfolderBase]: 23346/42523 cut-off events. [2023-11-17 12:35:07,811 INFO L125 PetriNetUnfolderBase]: For 14616880/14616880 co-relation queries the response was YES. [2023-11-17 12:35:10,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292062 conditions, 42523 events. 23346/42523 cut-off events. For 14616880/14616880 co-relation queries the response was YES. Maximal size of possible extension queue 1487. Compared 378427 event pairs, 7364 based on Foata normal form. 277/42799 useless extension candidates. Maximal degree in co-relation 291713. Up to 17561 conditions per place. [2023-11-17 12:35:10,319 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 1756 selfloop transitions, 1086 changer transitions 303/3146 dead transitions. [2023-11-17 12:35:10,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1058 places, 3146 transitions, 85442 flow [2023-11-17 12:35:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-17 12:35:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-11-17 12:35:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 1293 transitions. [2023-11-17 12:35:10,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2710691823899371 [2023-11-17 12:35:10,334 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 1293 transitions. [2023-11-17 12:35:10,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 1293 transitions. [2023-11-17 12:35:10,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:35:10,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 1293 transitions. [2023-11-17 12:35:10,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 14.366666666666667) internal successors, (1293), 90 states have internal predecessors, (1293), 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 12:35:10,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 53.0) internal successors, (4823), 91 states have internal predecessors, (4823), 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 12:35:10,340 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 53.0) internal successors, (4823), 91 states have internal predecessors, (4823), 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 12:35:10,340 INFO L175 Difference]: Start difference. First operand has 969 places, 1499 transitions, 38897 flow. Second operand 90 states and 1293 transitions. [2023-11-17 12:35:10,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1058 places, 3146 transitions, 85442 flow [2023-11-17 12:36:33,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1044 places, 3146 transitions, 44840 flow, removed 20280 selfloop flow, removed 14 redundant places. [2023-11-17 12:36:33,140 INFO L231 Difference]: Finished difference. Result has 1118 places, 2208 transitions, 32929 flow [2023-11-17 12:36:33,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=17468, PETRI_DIFFERENCE_MINUEND_PLACES=955, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=32929, PETRI_PLACES=1118, PETRI_TRANSITIONS=2208} [2023-11-17 12:36:33,141 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1097 predicate places. [2023-11-17 12:36:33,142 INFO L495 AbstractCegarLoop]: Abstraction has has 1118 places, 2208 transitions, 32929 flow [2023-11-17 12:36:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 7.521739130434782) internal successors, (346), 46 states have internal predecessors, (346), 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 12:36:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:36:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:36:33,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:36:33,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:36:33,347 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:36:33,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:36:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2052688484, now seen corresponding path program 18 times [2023-11-17 12:36:33,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:36:33,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679117243] [2023-11-17 12:36:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:36:33,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:36:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:36:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:36:34,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:36:34,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679117243] [2023-11-17 12:36:34,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679117243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:36:34,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028954631] [2023-11-17 12:36:34,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:36:34,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:36:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:36:34,749 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:36:34,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:36:34,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:36:34,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:36:34,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 12:36:34,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:36:35,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:36:35,563 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:36:35,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:36:35,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:36:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:36:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:36:35,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:36:35,566 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:36:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:36:35,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:36:35,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 60 treesize of output 33 [2023-11-17 12:36:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:36:35,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:36:42,408 INFO L349 Elim1Store]: treesize reduction 56, result has 95.2 percent of original size [2023-11-17 12:36:42,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 441 treesize of output 1345 [2023-11-17 12:39:57,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-11-17 12:39:57,875 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-17 12:39:57,876 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-17 12:39:57,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 12:39:58,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:39:58,077 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2023-11-17 12:39:58,080 INFO L158 Benchmark]: Toolchain (without parser) took 480664.28ms. Allocated memory was 278.9MB in the beginning and 4.5GB in the end (delta: 4.3GB). Free memory was 242.5MB in the beginning and 1.8GB in the end (delta: -1.6GB). Peak memory consumption was 4.2GB. Max. memory is 8.0GB. [2023-11-17 12:39:58,080 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory was 134.7MB in the beginning and 134.6MB in the end (delta: 137.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:39:58,080 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.28ms. Allocated memory is still 278.9MB. Free memory was 242.1MB in the beginning and 230.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:39:58,080 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.70ms. Allocated memory is still 278.9MB. Free memory was 230.5MB in the beginning and 228.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:39:58,081 INFO L158 Benchmark]: Boogie Preprocessor took 18.00ms. Allocated memory is still 278.9MB. Free memory was 228.5MB in the beginning and 226.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:39:58,081 INFO L158 Benchmark]: RCFGBuilder took 502.04ms. Allocated memory is still 278.9MB. Free memory was 226.8MB in the beginning and 186.5MB in the end (delta: 40.3MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2023-11-17 12:39:58,081 INFO L158 Benchmark]: TraceAbstraction took 479926.53ms. Allocated memory was 278.9MB in the beginning and 4.5GB in the end (delta: 4.3GB). Free memory was 185.9MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 4.2GB. Max. memory is 8.0GB. [2023-11-17 12:39:58,083 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory was 134.7MB in the beginning and 134.6MB in the end (delta: 137.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.28ms. Allocated memory is still 278.9MB. Free memory was 242.1MB in the beginning and 230.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.70ms. Allocated memory is still 278.9MB. Free memory was 230.5MB in the beginning and 228.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.00ms. Allocated memory is still 278.9MB. Free memory was 228.5MB in the beginning and 226.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 502.04ms. Allocated memory is still 278.9MB. Free memory was 226.8MB in the beginning and 186.5MB in the end (delta: 40.3MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. * TraceAbstraction took 479926.53ms. Allocated memory was 278.9MB in the beginning and 4.5GB in the end (delta: 4.3GB). Free memory was 185.9MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 4.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.6s, 31 PlacesBefore, 21 PlacesAfterwards, 30 TransitionsBefore, 17 TransitionsAfterwards, 262 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 20 TotalNumberOfCompositions, 317 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 291, independent: 285, independent conditional: 0, independent unconditional: 285, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 163, independent: 158, independent conditional: 0, independent unconditional: 158, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 163, independent: 158, independent conditional: 0, independent unconditional: 158, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 291, independent: 127, independent conditional: 0, independent unconditional: 127, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 163, unknown conditional: 0, unknown unconditional: 163] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...