/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/test-easy11.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:37:56,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:37:56,476 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 12:37:56,499 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:37:56,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:37:56,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:37:56,500 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:37:56,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:37:56,501 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:37:56,501 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:37:56,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:37:56,502 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:37:56,502 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:37:56,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:37:56,503 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:37:56,503 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:37:56,503 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:37:56,504 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:37:56,504 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:37:56,504 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:37:56,506 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:37:56,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:37:56,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:37:56,511 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:37:56,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:37:56,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:37:56,515 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:37:56,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:37:56,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:37:56,516 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:37:56,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:37:56,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:37:56,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:37:56,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:37:56,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:37:56,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:37:56,777 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:37:56,777 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:37:56,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-11-17 12:37:57,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:37:58,169 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:37:58,171 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-11-17 12:37:58,179 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6cfe803/3cad22a5981d4ee8a2d52864a2939d50/FLAG9d45b21b6 [2023-11-17 12:37:58,194 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6cfe803/3cad22a5981d4ee8a2d52864a2939d50 [2023-11-17 12:37:58,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:37:58,198 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:37:58,199 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:37:58,199 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:37:58,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:37:58,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,205 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d18c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58, skipping insertion in model container [2023-11-17 12:37:58,205 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,233 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:37:58,371 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/test-easy11.wvr.c[2031,2044] [2023-11-17 12:37:58,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:37:58,383 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:37:58,403 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/test-easy11.wvr.c[2031,2044] [2023-11-17 12:37:58,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:37:58,411 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:37:58,412 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:37:58,418 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:37:58,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58 WrapperNode [2023-11-17 12:37:58,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:37:58,422 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:37:58,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:37:58,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:37:58,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,455 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2023-11-17 12:37:58,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:37:58,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:37:58,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:37:58,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:37:58,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:37:58,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:37:58,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:37:58,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:37:58,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (1/1) ... [2023-11-17 12:37:58,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:37:58,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:37:58,511 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 12:37:58,525 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 12:37:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:37:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:37:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:37:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:37:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:37:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:37:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:37:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:37:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:37:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:37:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:37:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:37:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:37:58,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:37:58,537 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 12:37:58,611 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:37:58,613 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:37:58,768 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:37:58,907 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:37:58,907 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:37:58,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:37:58 BoogieIcfgContainer [2023-11-17 12:37:58,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:37:58,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:37:58,911 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:37:58,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:37:58,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:37:58" (1/3) ... [2023-11-17 12:37:58,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e44443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:37:58, skipping insertion in model container [2023-11-17 12:37:58,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:37:58" (2/3) ... [2023-11-17 12:37:58,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e44443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:37:58, skipping insertion in model container [2023-11-17 12:37:58,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:37:58" (3/3) ... [2023-11-17 12:37:58,916 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-11-17 12:37:58,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:37:58,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:37:58,932 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:37:58,984 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:37:59,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-17 12:37:59,061 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-17 12:37:59,062 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:37:59,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:37:59,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-17 12:37:59,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-17 12:37:59,071 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:37:59,083 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 25 places, 20 transitions, 52 flow [2023-11-17 12:37:59,085 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 25 places, 20 transitions, 52 flow [2023-11-17 12:37:59,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 20 transitions, 52 flow [2023-11-17 12:37:59,094 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 12:37:59,094 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:37:59,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:37:59,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 110 [2023-11-17 12:37:59,333 INFO L134 LiptonReduction]: Checked pairs total: 105 [2023-11-17 12:37:59,334 INFO L136 LiptonReduction]: Total number of compositions: 5 [2023-11-17 12:37:59,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:37:59,362 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a28f369, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:37:59,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:37:59,371 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:37:59,372 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:37:59,372 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:37:59,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:37:59,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:37:59,373 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 12:37:59,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:37:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1082838084, now seen corresponding path program 1 times [2023-11-17 12:37:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:37:59,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305248927] [2023-11-17 12:37:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:37:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:37:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:37:59,889 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 12:37:59,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:37:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305248927] [2023-11-17 12:37:59,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305248927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:37:59,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:37:59,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:37:59,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091944099] [2023-11-17 12:37:59,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:37:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:37:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:37:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:37:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:37:59,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:37:59,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:37:59,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:37:59,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:37:59,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:00,108 INFO L124 PetriNetUnfolderBase]: 42/82 cut-off events. [2023-11-17 12:38:00,109 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-17 12:38:00,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 82 events. 42/82 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 165 event pairs, 7 based on Foata normal form. 1/65 useless extension candidates. Maximal degree in co-relation 132. Up to 34 conditions per place. [2023-11-17 12:38:00,111 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 23 selfloop transitions, 8 changer transitions 5/36 dead transitions. [2023-11-17 12:38:00,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 165 flow [2023-11-17 12:38:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 58 transitions. [2023-11-17 12:38:00,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29591836734693877 [2023-11-17 12:38:00,124 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 58 transitions. [2023-11-17 12:38:00,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 58 transitions. [2023-11-17 12:38:00,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:00,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 58 transitions. [2023-11-17 12:38:00,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 12:38:00,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:00,132 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:00,134 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 58 transitions. [2023-11-17 12:38:00,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 165 flow [2023-11-17 12:38:00,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 36 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:38:00,139 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 84 flow [2023-11-17 12:38:00,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=84, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-17 12:38:00,143 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-17 12:38:00,144 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 84 flow [2023-11-17 12:38:00,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:00,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:00,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:00,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:38:00,145 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 12:38:00,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash -238799120, now seen corresponding path program 2 times [2023-11-17 12:38:00,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:00,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759628444] [2023-11-17 12:38:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:00,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:00,317 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 12:38:00,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759628444] [2023-11-17 12:38:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759628444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:00,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:00,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73974135] [2023-11-17 12:38:00,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:00,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:38:00,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:38:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:00,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:00,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 84 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:00,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:00,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:00,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:00,497 INFO L124 PetriNetUnfolderBase]: 47/91 cut-off events. [2023-11-17 12:38:00,497 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-17 12:38:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 91 events. 47/91 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 1 based on Foata normal form. 1/92 useless extension candidates. Maximal degree in co-relation 251. Up to 25 conditions per place. [2023-11-17 12:38:00,501 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 30 selfloop transitions, 9 changer transitions 5/44 dead transitions. [2023-11-17 12:38:00,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 236 flow [2023-11-17 12:38:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2023-11-17 12:38:00,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32653061224489793 [2023-11-17 12:38:00,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 64 transitions. [2023-11-17 12:38:00,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 64 transitions. [2023-11-17 12:38:00,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:00,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 64 transitions. [2023-11-17 12:38:00,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:38:00,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:00,506 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:00,506 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 84 flow. Second operand 7 states and 64 transitions. [2023-11-17 12:38:00,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 236 flow [2023-11-17 12:38:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 228 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 12:38:00,513 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 108 flow [2023-11-17 12:38:00,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=108, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-17 12:38:00,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-17 12:38:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 108 flow [2023-11-17 12:38:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:00,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:00,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:38:00,518 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 12:38:00,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1156189086, now seen corresponding path program 3 times [2023-11-17 12:38:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024956154] [2023-11-17 12:38:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:00,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:00,684 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 12:38:00,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:00,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024956154] [2023-11-17 12:38:00,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024956154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:00,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:00,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:00,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939252399] [2023-11-17 12:38:00,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:00,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:38:00,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:38:00,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:00,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:00,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:00,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:00,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:00,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:00,858 INFO L124 PetriNetUnfolderBase]: 57/107 cut-off events. [2023-11-17 12:38:00,858 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-17 12:38:00,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 107 events. 57/107 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 247 event pairs, 7 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 336. Up to 60 conditions per place. [2023-11-17 12:38:00,862 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 28 selfloop transitions, 12 changer transitions 5/45 dead transitions. [2023-11-17 12:38:00,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 45 transitions, 276 flow [2023-11-17 12:38:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2023-11-17 12:38:00,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32653061224489793 [2023-11-17 12:38:00,864 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 64 transitions. [2023-11-17 12:38:00,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 64 transitions. [2023-11-17 12:38:00,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:00,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 64 transitions. [2023-11-17 12:38:00,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:38:00,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:00,867 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:00,867 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 108 flow. Second operand 7 states and 64 transitions. [2023-11-17 12:38:00,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 45 transitions, 276 flow [2023-11-17 12:38:00,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 241 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-17 12:38:00,872 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 158 flow [2023-11-17 12:38:00,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-17 12:38:00,873 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-17 12:38:00,873 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 158 flow [2023-11-17 12:38:00,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:00,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:00,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:00,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:38:00,874 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 12:38:00,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash -237015182, now seen corresponding path program 4 times [2023-11-17 12:38:00,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:00,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966162663] [2023-11-17 12:38:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:00,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:00,977 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 12:38:00,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:00,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966162663] [2023-11-17 12:38:00,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966162663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:00,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:00,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929449120] [2023-11-17 12:38:00,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:00,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:38:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:38:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:00,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:00,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:00,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:00,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:00,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:01,113 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2023-11-17 12:38:01,114 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-11-17 12:38:01,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 123 events. 67/123 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 315 event pairs, 5 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 429. Up to 71 conditions per place. [2023-11-17 12:38:01,115 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 33 selfloop transitions, 15 changer transitions 5/53 dead transitions. [2023-11-17 12:38:01,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 369 flow [2023-11-17 12:38:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2023-11-17 12:38:01,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336734693877551 [2023-11-17 12:38:01,117 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 66 transitions. [2023-11-17 12:38:01,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 66 transitions. [2023-11-17 12:38:01,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:01,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 66 transitions. [2023-11-17 12:38:01,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 12:38:01,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,118 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,119 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 158 flow. Second operand 7 states and 66 transitions. [2023-11-17 12:38:01,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 369 flow [2023-11-17 12:38:01,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 333 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-17 12:38:01,122 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 226 flow [2023-11-17 12:38:01,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-17 12:38:01,122 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-11-17 12:38:01,123 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 226 flow [2023-11-17 12:38:01,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:01,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:01,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:38:01,123 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 12:38:01,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1160357780, now seen corresponding path program 5 times [2023-11-17 12:38:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:01,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748139779] [2023-11-17 12:38:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:01,221 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 12:38:01,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:01,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748139779] [2023-11-17 12:38:01,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748139779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:01,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:01,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40401490] [2023-11-17 12:38:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:01,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:38:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:38:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:01,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:01,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:01,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:01,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:01,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:01,351 INFO L124 PetriNetUnfolderBase]: 66/124 cut-off events. [2023-11-17 12:38:01,352 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2023-11-17 12:38:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 124 events. 66/124 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 320 event pairs, 5 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 483. Up to 76 conditions per place. [2023-11-17 12:38:01,356 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 32 selfloop transitions, 15 changer transitions 5/52 dead transitions. [2023-11-17 12:38:01,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 401 flow [2023-11-17 12:38:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2023-11-17 12:38:01,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32653061224489793 [2023-11-17 12:38:01,358 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 64 transitions. [2023-11-17 12:38:01,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 64 transitions. [2023-11-17 12:38:01,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:01,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 64 transitions. [2023-11-17 12:38:01,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 12:38:01,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,359 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,359 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 226 flow. Second operand 7 states and 64 transitions. [2023-11-17 12:38:01,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 401 flow [2023-11-17 12:38:01,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 355 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-17 12:38:01,363 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 226 flow [2023-11-17 12:38:01,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=226, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-11-17 12:38:01,364 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-17 12:38:01,364 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 226 flow [2023-11-17 12:38:01,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:01,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:01,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:01,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:38:01,365 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 12:38:01,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1178791806, now seen corresponding path program 6 times [2023-11-17 12:38:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:01,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769004529] [2023-11-17 12:38:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:01,452 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 12:38:01,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:01,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769004529] [2023-11-17 12:38:01,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769004529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:01,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:01,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:01,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817811414] [2023-11-17 12:38:01,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:01,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 12:38:01,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 12:38:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:01,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:01,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:01,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:01,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:01,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:01,568 INFO L124 PetriNetUnfolderBase]: 67/127 cut-off events. [2023-11-17 12:38:01,568 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2023-11-17 12:38:01,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 127 events. 67/127 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 327 event pairs, 9 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 487. Up to 79 conditions per place. [2023-11-17 12:38:01,569 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 31 selfloop transitions, 15 changer transitions 5/51 dead transitions. [2023-11-17 12:38:01,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 398 flow [2023-11-17 12:38:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 62 transitions. [2023-11-17 12:38:01,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2023-11-17 12:38:01,571 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 62 transitions. [2023-11-17 12:38:01,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 62 transitions. [2023-11-17 12:38:01,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:01,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 62 transitions. [2023-11-17 12:38:01,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 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 12:38:01,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,572 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,572 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 226 flow. Second operand 7 states and 62 transitions. [2023-11-17 12:38:01,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 398 flow [2023-11-17 12:38:01,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 360 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-17 12:38:01,575 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 236 flow [2023-11-17 12:38:01,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-11-17 12:38:01,576 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-11-17 12:38:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 236 flow [2023-11-17 12:38:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 12:38:01,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:01,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 12:38:01,577 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 12:38:01,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1175160124, now seen corresponding path program 1 times [2023-11-17 12:38:01,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:01,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019472047] [2023-11-17 12:38:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:01,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:01,614 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 12:38:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019472047] [2023-11-17 12:38:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019472047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:01,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:01,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631327607] [2023-11-17 12:38:01,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:01,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:01,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:01,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:01,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:01,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:01,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:01,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:01,714 INFO L124 PetriNetUnfolderBase]: 104/195 cut-off events. [2023-11-17 12:38:01,714 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-11-17 12:38:01,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 195 events. 104/195 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 625 event pairs, 14 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 771. Up to 78 conditions per place. [2023-11-17 12:38:01,716 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 46 selfloop transitions, 22 changer transitions 4/72 dead transitions. [2023-11-17 12:38:01,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 572 flow [2023-11-17 12:38:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2023-11-17 12:38:01,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34183673469387754 [2023-11-17 12:38:01,717 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 67 transitions. [2023-11-17 12:38:01,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 67 transitions. [2023-11-17 12:38:01,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:01,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 67 transitions. [2023-11-17 12:38:01,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:38:01,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,719 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:01,719 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 236 flow. Second operand 7 states and 67 transitions. [2023-11-17 12:38:01,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 572 flow [2023-11-17 12:38:01,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 518 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-11-17 12:38:01,723 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 362 flow [2023-11-17 12:38:01,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-17 12:38:01,723 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-11-17 12:38:01,723 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 362 flow [2023-11-17 12:38:01,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:01,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:01,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:01,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:38:01,724 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 12:38:01,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:01,725 INFO L85 PathProgramCache]: Analyzing trace with hash -268601077, now seen corresponding path program 1 times [2023-11-17 12:38:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556183694] [2023-11-17 12:38:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:01,786 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 12:38:01,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:01,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556183694] [2023-11-17 12:38:01,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556183694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:01,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:01,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:01,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954348682] [2023-11-17 12:38:01,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:01,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:01,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:01,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:01,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:01,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:01,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:01,871 INFO L124 PetriNetUnfolderBase]: 108/203 cut-off events. [2023-11-17 12:38:01,872 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-11-17 12:38:01,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 203 events. 108/203 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 644 event pairs, 2 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 863. Up to 135 conditions per place. [2023-11-17 12:38:01,874 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 50 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2023-11-17 12:38:01,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 572 flow [2023-11-17 12:38:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:38:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:38:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:38:01,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2023-11-17 12:38:01,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:38:01,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:38:01,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:01,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:38:01,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 12:38:01,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 12:38:01,876 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 12:38:01,876 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 362 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:38:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 572 flow [2023-11-17 12:38:01,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 548 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 12:38:01,881 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 387 flow [2023-11-17 12:38:01,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-17 12:38:01,882 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-11-17 12:38:01,882 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 387 flow [2023-11-17 12:38:01,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:01,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:01,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:01,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 12:38:01,883 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 12:38:01,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash -286597472, now seen corresponding path program 2 times [2023-11-17 12:38:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:01,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961475592] [2023-11-17 12:38:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:01,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:01,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:01,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961475592] [2023-11-17 12:38:01,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961475592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:01,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373302538] [2023-11-17 12:38:01,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:38:01,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:01,933 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 12:38:01,952 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 12:38:01,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:38:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:02,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:38:02,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:02,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:02,072 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 12:38:02,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373302538] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:02,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:38:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-11-17 12:38:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260597981] [2023-11-17 12:38:02,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:02,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:02,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:02,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:02,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:02,165 INFO L124 PetriNetUnfolderBase]: 122/239 cut-off events. [2023-11-17 12:38:02,165 INFO L125 PetriNetUnfolderBase]: For 1221/1221 co-relation queries the response was YES. [2023-11-17 12:38:02,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1136 conditions, 239 events. 122/239 cut-off events. For 1221/1221 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 859 event pairs, 22 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 947. Up to 128 conditions per place. [2023-11-17 12:38:02,168 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 24 changer transitions 0/79 dead transitions. [2023-11-17 12:38:02,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 703 flow [2023-11-17 12:38:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:38:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:38:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2023-11-17 12:38:02,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-11-17 12:38:02,169 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 69 transitions. [2023-11-17 12:38:02,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 69 transitions. [2023-11-17 12:38:02,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:02,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 69 transitions. [2023-11-17 12:38:02,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 12:38:02,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:02,171 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:02,171 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 387 flow. Second operand 6 states and 69 transitions. [2023-11-17 12:38:02,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 703 flow [2023-11-17 12:38:02,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 670 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 12:38:02,177 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 524 flow [2023-11-17 12:38:02,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-11-17 12:38:02,177 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 12:38:02,177 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 524 flow [2023-11-17 12:38:02,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:02,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:02,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:38:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:02,384 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 12:38:02,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash -911051750, now seen corresponding path program 3 times [2023-11-17 12:38:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:02,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086840198] [2023-11-17 12:38:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:02,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:02,422 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 12:38:02,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:02,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086840198] [2023-11-17 12:38:02,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086840198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:02,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:02,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742064679] [2023-11-17 12:38:02,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:02,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:02,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 524 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:02,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:02,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:02,546 INFO L124 PetriNetUnfolderBase]: 112/219 cut-off events. [2023-11-17 12:38:02,546 INFO L125 PetriNetUnfolderBase]: For 1150/1150 co-relation queries the response was YES. [2023-11-17 12:38:02,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1122 conditions, 219 events. 112/219 cut-off events. For 1150/1150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 755 event pairs, 18 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 1039. Up to 94 conditions per place. [2023-11-17 12:38:02,548 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 53 selfloop transitions, 24 changer transitions 3/80 dead transitions. [2023-11-17 12:38:02,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 767 flow [2023-11-17 12:38:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:38:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:38:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2023-11-17 12:38:02,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35267857142857145 [2023-11-17 12:38:02,553 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 79 transitions. [2023-11-17 12:38:02,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 79 transitions. [2023-11-17 12:38:02,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:02,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 79 transitions. [2023-11-17 12:38:02,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 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 12:38:02,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 12:38:02,555 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 12:38:02,555 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 524 flow. Second operand 8 states and 79 transitions. [2023-11-17 12:38:02,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 767 flow [2023-11-17 12:38:02,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 724 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-17 12:38:02,562 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 499 flow [2023-11-17 12:38:02,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=499, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-17 12:38:02,563 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2023-11-17 12:38:02,563 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 499 flow [2023-11-17 12:38:02,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:02,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:02,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 12:38:02,564 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 12:38:02,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2145691071, now seen corresponding path program 2 times [2023-11-17 12:38:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746621590] [2023-11-17 12:38:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:02,605 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 12:38:02,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:02,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746621590] [2023-11-17 12:38:02,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746621590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:02,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:02,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494645320] [2023-11-17 12:38:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:02,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:02,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:02,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:02,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:02,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:02,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:02,725 INFO L124 PetriNetUnfolderBase]: 117/232 cut-off events. [2023-11-17 12:38:02,725 INFO L125 PetriNetUnfolderBase]: For 1317/1317 co-relation queries the response was YES. [2023-11-17 12:38:02,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 232 events. 117/232 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 814 event pairs, 2 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 1101. Up to 79 conditions per place. [2023-11-17 12:38:02,728 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 50 selfloop transitions, 19 changer transitions 2/71 dead transitions. [2023-11-17 12:38:02,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 752 flow [2023-11-17 12:38:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:38:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:38:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2023-11-17 12:38:02,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2023-11-17 12:38:02,729 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 58 transitions. [2023-11-17 12:38:02,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 58 transitions. [2023-11-17 12:38:02,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:02,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 58 transitions. [2023-11-17 12:38:02,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 12:38:02,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:02,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:02,730 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 499 flow. Second operand 6 states and 58 transitions. [2023-11-17 12:38:02,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 752 flow [2023-11-17 12:38:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 715 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:38:02,737 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 508 flow [2023-11-17 12:38:02,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2023-11-17 12:38:02,737 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-11-17 12:38:02,738 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 508 flow [2023-11-17 12:38:02,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:02,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:02,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:38:02,738 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 12:38:02,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 645193507, now seen corresponding path program 3 times [2023-11-17 12:38:02,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:02,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223432925] [2023-11-17 12:38:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:02,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:02,789 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 12:38:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223432925] [2023-11-17 12:38:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223432925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:02,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:02,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:02,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568743759] [2023-11-17 12:38:02,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:02,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:02,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:02,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 508 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:02,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:02,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:02,906 INFO L124 PetriNetUnfolderBase]: 149/296 cut-off events. [2023-11-17 12:38:02,906 INFO L125 PetriNetUnfolderBase]: For 2029/2029 co-relation queries the response was YES. [2023-11-17 12:38:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 296 events. 149/296 cut-off events. For 2029/2029 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1131 event pairs, 24 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 1413. Up to 117 conditions per place. [2023-11-17 12:38:02,910 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 54 selfloop transitions, 28 changer transitions 2/84 dead transitions. [2023-11-17 12:38:02,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 936 flow [2023-11-17 12:38:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:38:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:38:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2023-11-17 12:38:02,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2023-11-17 12:38:02,911 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 63 transitions. [2023-11-17 12:38:02,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 63 transitions. [2023-11-17 12:38:02,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:02,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 63 transitions. [2023-11-17 12:38:02,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 12:38:02,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:02,912 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 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 12:38:02,912 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 508 flow. Second operand 7 states and 63 transitions. [2023-11-17 12:38:02,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 936 flow [2023-11-17 12:38:02,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 887 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-17 12:38:02,921 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 696 flow [2023-11-17 12:38:02,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2023-11-17 12:38:02,923 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-11-17 12:38:02,923 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 696 flow [2023-11-17 12:38:02,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:02,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 12:38:02,924 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 12:38:02,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1574236265, now seen corresponding path program 4 times [2023-11-17 12:38:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888095156] [2023-11-17 12:38:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:02,964 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 12:38:02,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:02,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888095156] [2023-11-17 12:38:02,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888095156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:02,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:02,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676142408] [2023-11-17 12:38:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:02,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:02,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:02,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 696 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:02,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:02,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:02,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:03,087 INFO L124 PetriNetUnfolderBase]: 141/276 cut-off events. [2023-11-17 12:38:03,087 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2023-11-17 12:38:03,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1578 conditions, 276 events. 141/276 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1024 event pairs, 20 based on Foata normal form. 4/280 useless extension candidates. Maximal degree in co-relation 1487. Up to 92 conditions per place. [2023-11-17 12:38:03,090 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 58 selfloop transitions, 29 changer transitions 1/88 dead transitions. [2023-11-17 12:38:03,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 1027 flow [2023-11-17 12:38:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:38:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:38:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2023-11-17 12:38:03,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33482142857142855 [2023-11-17 12:38:03,091 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 75 transitions. [2023-11-17 12:38:03,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 75 transitions. [2023-11-17 12:38:03,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:03,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 75 transitions. [2023-11-17 12:38:03,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 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 12:38:03,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 12:38:03,093 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 12:38:03,093 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 696 flow. Second operand 8 states and 75 transitions. [2023-11-17 12:38:03,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 1027 flow [2023-11-17 12:38:03,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 88 transitions, 983 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-17 12:38:03,106 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 744 flow [2023-11-17 12:38:03,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=744, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2023-11-17 12:38:03,107 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-11-17 12:38:03,107 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 744 flow [2023-11-17 12:38:03,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:03,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:03,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 12:38:03,107 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 12:38:03,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash -858052278, now seen corresponding path program 4 times [2023-11-17 12:38:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:03,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298526169] [2023-11-17 12:38:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:03,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298526169] [2023-11-17 12:38:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298526169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467277194] [2023-11-17 12:38:03,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:38:03,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:03,142 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 12:38:03,164 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 12:38:03,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:38:03,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:03,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:38:03,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:03,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:03,258 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 12:38:03,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467277194] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:38:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-11-17 12:38:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526106732] [2023-11-17 12:38:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:03,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:03,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:03,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 744 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:03,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:03,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:03,351 INFO L124 PetriNetUnfolderBase]: 130/253 cut-off events. [2023-11-17 12:38:03,352 INFO L125 PetriNetUnfolderBase]: For 1985/1985 co-relation queries the response was YES. [2023-11-17 12:38:03,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 253 events. 130/253 cut-off events. For 1985/1985 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 895 event pairs, 9 based on Foata normal form. 4/257 useless extension candidates. Maximal degree in co-relation 1411. Up to 122 conditions per place. [2023-11-17 12:38:03,355 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2023-11-17 12:38:03,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 946 flow [2023-11-17 12:38:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:38:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:38:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2023-11-17 12:38:03,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-11-17 12:38:03,356 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 55 transitions. [2023-11-17 12:38:03,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 55 transitions. [2023-11-17 12:38:03,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:03,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 55 transitions. [2023-11-17 12:38:03,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 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 12:38:03,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 12:38:03,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 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 12:38:03,357 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 744 flow. Second operand 5 states and 55 transitions. [2023-11-17 12:38:03,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 946 flow [2023-11-17 12:38:03,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 896 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 12:38:03,364 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 723 flow [2023-11-17 12:38:03,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=723, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2023-11-17 12:38:03,365 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-11-17 12:38:03,365 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 723 flow [2023-11-17 12:38:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:03,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:03,374 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 12:38:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:38:03,574 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 12:38:03,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1482506556, now seen corresponding path program 5 times [2023-11-17 12:38:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177178237] [2023-11-17 12:38:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:03,609 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 12:38:03,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:03,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177178237] [2023-11-17 12:38:03,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177178237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:38:03,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:38:03,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:38:03,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317898050] [2023-11-17 12:38:03,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:03,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:03,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:38:03,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:03,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 723 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:03,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:03,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:03,705 INFO L124 PetriNetUnfolderBase]: 116/229 cut-off events. [2023-11-17 12:38:03,705 INFO L125 PetriNetUnfolderBase]: For 1831/1831 co-relation queries the response was YES. [2023-11-17 12:38:03,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1344 conditions, 229 events. 116/229 cut-off events. For 1831/1831 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 788 event pairs, 9 based on Foata normal form. 8/237 useless extension candidates. Maximal degree in co-relation 1267. Up to 102 conditions per place. [2023-11-17 12:38:03,708 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 54 selfloop transitions, 19 changer transitions 2/75 dead transitions. [2023-11-17 12:38:03,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 914 flow [2023-11-17 12:38:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:38:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:38:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2023-11-17 12:38:03,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2023-11-17 12:38:03,709 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 58 transitions. [2023-11-17 12:38:03,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 58 transitions. [2023-11-17 12:38:03,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:03,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 58 transitions. [2023-11-17 12:38:03,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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 12:38:03,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:03,710 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:03,710 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 723 flow. Second operand 6 states and 58 transitions. [2023-11-17 12:38:03,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 914 flow [2023-11-17 12:38:03,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 75 transitions, 883 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 12:38:03,717 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 653 flow [2023-11-17 12:38:03,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=653, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-11-17 12:38:03,718 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-11-17 12:38:03,718 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 653 flow [2023-11-17 12:38:03,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:03,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:03,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 12:38:03,718 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 12:38:03,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -978000667, now seen corresponding path program 5 times [2023-11-17 12:38:03,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:03,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75228438] [2023-11-17 12:38:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:03,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:03,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75228438] [2023-11-17 12:38:03,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75228438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281321905] [2023-11-17 12:38:03,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:38:03,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:03,765 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 12:38:03,783 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 12:38:03,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:38:03,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:03,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:38:03,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:03,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:03,874 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 12:38:03,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281321905] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:03,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:38:03,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-11-17 12:38:03,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354626088] [2023-11-17 12:38:03,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:38:03,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:38:03,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:38:03,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:38:03,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:03,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 653 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:03,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:03,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:03,960 INFO L124 PetriNetUnfolderBase]: 111/212 cut-off events. [2023-11-17 12:38:03,960 INFO L125 PetriNetUnfolderBase]: For 1978/1978 co-relation queries the response was YES. [2023-11-17 12:38:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267 conditions, 212 events. 111/212 cut-off events. For 1978/1978 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 673 event pairs, 20 based on Foata normal form. 6/218 useless extension candidates. Maximal degree in co-relation 1165. Up to 132 conditions per place. [2023-11-17 12:38:03,963 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 51 selfloop transitions, 24 changer transitions 0/75 dead transitions. [2023-11-17 12:38:03,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 865 flow [2023-11-17 12:38:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:38:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:38:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2023-11-17 12:38:03,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2023-11-17 12:38:03,964 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2023-11-17 12:38:03,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2023-11-17 12:38:03,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:03,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2023-11-17 12:38:03,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 12:38:03,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:03,965 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 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 12:38:03,965 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 653 flow. Second operand 6 states and 62 transitions. [2023-11-17 12:38:03,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 865 flow [2023-11-17 12:38:03,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 785 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-11-17 12:38:03,971 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 628 flow [2023-11-17 12:38:03,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=628, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-11-17 12:38:03,972 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-11-17 12:38:03,972 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 628 flow [2023-11-17 12:38:03,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 12:38:03,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:03,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:03,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:38:04,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:04,179 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 12:38:04,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash 465721035, now seen corresponding path program 1 times [2023-11-17 12:38:04,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:04,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528496430] [2023-11-17 12:38:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:04,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:04,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528496430] [2023-11-17 12:38:04,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528496430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183272536] [2023-11-17 12:38:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:04,301 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 12:38:04,312 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 12:38:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:04,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:04,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:04,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:04,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183272536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:04,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:04,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:38:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423109953] [2023-11-17 12:38:04,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:04,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:38:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:38:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:38:04,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:04,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 628 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 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 12:38:04,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:04,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:04,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:04,987 INFO L124 PetriNetUnfolderBase]: 116/218 cut-off events. [2023-11-17 12:38:04,988 INFO L125 PetriNetUnfolderBase]: For 1470/1470 co-relation queries the response was YES. [2023-11-17 12:38:04,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1292 conditions, 218 events. 116/218 cut-off events. For 1470/1470 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 712 event pairs, 2 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 1024. Up to 53 conditions per place. [2023-11-17 12:38:04,990 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 41 selfloop transitions, 21 changer transitions 26/88 dead transitions. [2023-11-17 12:38:04,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 88 transitions, 979 flow [2023-11-17 12:38:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:38:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:38:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 92 transitions. [2023-11-17 12:38:04,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2987012987012987 [2023-11-17 12:38:04,991 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 92 transitions. [2023-11-17 12:38:04,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 92 transitions. [2023-11-17 12:38:04,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:04,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 92 transitions. [2023-11-17 12:38:04,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 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 12:38:04,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:04,992 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:04,992 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 628 flow. Second operand 11 states and 92 transitions. [2023-11-17 12:38:04,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 88 transitions, 979 flow [2023-11-17 12:38:04,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 964 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:38:04,999 INFO L231 Difference]: Finished difference. Result has 87 places, 46 transitions, 533 flow [2023-11-17 12:38:04,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=533, PETRI_PLACES=87, PETRI_TRANSITIONS=46} [2023-11-17 12:38:05,000 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2023-11-17 12:38:05,000 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 46 transitions, 533 flow [2023-11-17 12:38:05,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 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 12:38:05,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:05,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:05,012 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 12:38:05,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:38:05,207 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 12:38:05,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2050156055, now seen corresponding path program 2 times [2023-11-17 12:38:05,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:05,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357406530] [2023-11-17 12:38:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357406530] [2023-11-17 12:38:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357406530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135054579] [2023-11-17 12:38:05,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:38:05,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:05,301 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 12:38:05,317 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 12:38:05,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:38:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:05,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:05,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:05,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135054579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:05,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:05,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:38:05,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076741242] [2023-11-17 12:38:05,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:05,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:38:05,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:38:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:38:05,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:05,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 46 transitions, 533 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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 12:38:05,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:05,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:05,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:05,870 INFO L124 PetriNetUnfolderBase]: 90/178 cut-off events. [2023-11-17 12:38:05,870 INFO L125 PetriNetUnfolderBase]: For 1426/1426 co-relation queries the response was YES. [2023-11-17 12:38:05,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1090 conditions, 178 events. 90/178 cut-off events. For 1426/1426 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 541 event pairs, 2 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 1054. Up to 55 conditions per place. [2023-11-17 12:38:05,872 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 45 selfloop transitions, 26 changer transitions 9/80 dead transitions. [2023-11-17 12:38:05,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 918 flow [2023-11-17 12:38:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:38:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:38:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 91 transitions. [2023-11-17 12:38:05,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2023-11-17 12:38:05,873 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 91 transitions. [2023-11-17 12:38:05,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 91 transitions. [2023-11-17 12:38:05,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:05,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 91 transitions. [2023-11-17 12:38:05,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 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 12:38:05,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:05,875 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:05,875 INFO L175 Difference]: Start difference. First operand has 87 places, 46 transitions, 533 flow. Second operand 11 states and 91 transitions. [2023-11-17 12:38:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 918 flow [2023-11-17 12:38:05,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 782 flow, removed 21 selfloop flow, removed 16 redundant places. [2023-11-17 12:38:05,881 INFO L231 Difference]: Finished difference. Result has 74 places, 49 transitions, 537 flow [2023-11-17 12:38:05,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=537, PETRI_PLACES=74, PETRI_TRANSITIONS=49} [2023-11-17 12:38:05,881 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-11-17 12:38:05,882 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 49 transitions, 537 flow [2023-11-17 12:38:05,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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 12:38:05,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:05,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:05,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:38:06,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 12:38:06,088 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 12:38:06,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2072758775, now seen corresponding path program 3 times [2023-11-17 12:38:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804789794] [2023-11-17 12:38:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:06,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:06,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804789794] [2023-11-17 12:38:06,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804789794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:06,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688741303] [2023-11-17 12:38:06,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:38:06,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:06,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:06,182 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 12:38:06,184 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 12:38:06,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:38:06,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:06,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:06,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:06,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:06,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688741303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:06,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:06,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:38:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185780875] [2023-11-17 12:38:06,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:06,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:38:06,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:38:06,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:38:06,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:06,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 49 transitions, 537 flow. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 12:38:06,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:06,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:06,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:06,754 INFO L124 PetriNetUnfolderBase]: 84/173 cut-off events. [2023-11-17 12:38:06,754 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2023-11-17 12:38:06,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 173 events. 84/173 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 526 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 968. Up to 55 conditions per place. [2023-11-17 12:38:06,755 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 33 selfloop transitions, 15 changer transitions 26/74 dead transitions. [2023-11-17 12:38:06,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 810 flow [2023-11-17 12:38:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:38:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:38:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 85 transitions. [2023-11-17 12:38:06,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.275974025974026 [2023-11-17 12:38:06,756 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 85 transitions. [2023-11-17 12:38:06,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 85 transitions. [2023-11-17 12:38:06,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:06,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 85 transitions. [2023-11-17 12:38:06,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.7272727272727275) internal successors, (85), 11 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:38:06,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:06,758 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:06,758 INFO L175 Difference]: Start difference. First operand has 74 places, 49 transitions, 537 flow. Second operand 11 states and 85 transitions. [2023-11-17 12:38:06,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 810 flow [2023-11-17 12:38:06,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 753 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-17 12:38:06,763 INFO L231 Difference]: Finished difference. Result has 76 places, 37 transitions, 372 flow [2023-11-17 12:38:06,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=372, PETRI_PLACES=76, PETRI_TRANSITIONS=37} [2023-11-17 12:38:06,764 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-11-17 12:38:06,764 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 37 transitions, 372 flow [2023-11-17 12:38:06,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 12:38:06,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:06,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:06,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:38:06,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:06,971 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 12:38:06,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -832510453, now seen corresponding path program 4 times [2023-11-17 12:38:06,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676447205] [2023-11-17 12:38:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676447205] [2023-11-17 12:38:07,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676447205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057044521] [2023-11-17 12:38:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:38:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:07,081 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 12:38:07,099 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 12:38:07,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:38:07,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:07,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:07,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:07,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:07,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057044521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:07,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:07,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:38:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514894263] [2023-11-17 12:38:07,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:07,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:38:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:38:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:38:07,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:07,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 37 transitions, 372 flow. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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 12:38:07,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:07,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:07,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:07,653 INFO L124 PetriNetUnfolderBase]: 67/145 cut-off events. [2023-11-17 12:38:07,653 INFO L125 PetriNetUnfolderBase]: For 778/778 co-relation queries the response was YES. [2023-11-17 12:38:07,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 145 events. 67/145 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 432 event pairs, 1 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 787. Up to 35 conditions per place. [2023-11-17 12:38:07,654 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 32 selfloop transitions, 28 changer transitions 12/72 dead transitions. [2023-11-17 12:38:07,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 72 transitions, 748 flow [2023-11-17 12:38:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:38:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:38:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 108 transitions. [2023-11-17 12:38:07,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2571428571428571 [2023-11-17 12:38:07,656 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 108 transitions. [2023-11-17 12:38:07,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 108 transitions. [2023-11-17 12:38:07,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:07,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 108 transitions. [2023-11-17 12:38:07,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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 12:38:07,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 28.0) internal successors, (448), 16 states have internal predecessors, (448), 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 12:38:07,657 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 28.0) internal successors, (448), 16 states have internal predecessors, (448), 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 12:38:07,657 INFO L175 Difference]: Start difference. First operand has 76 places, 37 transitions, 372 flow. Second operand 15 states and 108 transitions. [2023-11-17 12:38:07,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 72 transitions, 748 flow [2023-11-17 12:38:07,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 671 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-11-17 12:38:07,661 INFO L231 Difference]: Finished difference. Result has 75 places, 43 transitions, 463 flow [2023-11-17 12:38:07,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=463, PETRI_PLACES=75, PETRI_TRANSITIONS=43} [2023-11-17 12:38:07,661 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-11-17 12:38:07,661 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 43 transitions, 463 flow [2023-11-17 12:38:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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 12:38:07,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:07,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:07,672 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 12:38:07,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:07,864 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 12:38:07,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash 910219911, now seen corresponding path program 5 times [2023-11-17 12:38:07,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:07,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487618143] [2023-11-17 12:38:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:07,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487618143] [2023-11-17 12:38:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487618143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75114005] [2023-11-17 12:38:07,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:38:07,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:07,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:07,955 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 12:38:07,979 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 12:38:08,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:38:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:08,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:38:08,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:08,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:08,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75114005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:08,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:08,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-11-17 12:38:08,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097196413] [2023-11-17 12:38:08,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:08,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:38:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:08,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:38:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:38:08,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 43 transitions, 463 flow. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 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 12:38:08,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:08,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:08,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:08,389 INFO L124 PetriNetUnfolderBase]: 60/134 cut-off events. [2023-11-17 12:38:08,389 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2023-11-17 12:38:08,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 134 events. 60/134 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 399 event pairs, 1 based on Foata normal form. 7/141 useless extension candidates. Maximal degree in co-relation 759. Up to 44 conditions per place. [2023-11-17 12:38:08,390 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 32 selfloop transitions, 21 changer transitions 16/69 dead transitions. [2023-11-17 12:38:08,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 722 flow [2023-11-17 12:38:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:38:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:38:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 101 transitions. [2023-11-17 12:38:08,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2576530612244898 [2023-11-17 12:38:08,391 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 101 transitions. [2023-11-17 12:38:08,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 101 transitions. [2023-11-17 12:38:08,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:08,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 101 transitions. [2023-11-17 12:38:08,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:38:08,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 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 12:38:08,393 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 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 12:38:08,393 INFO L175 Difference]: Start difference. First operand has 75 places, 43 transitions, 463 flow. Second operand 14 states and 101 transitions. [2023-11-17 12:38:08,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 722 flow [2023-11-17 12:38:08,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 69 transitions, 637 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-11-17 12:38:08,397 INFO L231 Difference]: Finished difference. Result has 81 places, 40 transitions, 386 flow [2023-11-17 12:38:08,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=386, PETRI_PLACES=81, PETRI_TRANSITIONS=40} [2023-11-17 12:38:08,398 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-11-17 12:38:08,398 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 40 transitions, 386 flow [2023-11-17 12:38:08,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 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 12:38:08,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:08,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:08,406 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 12:38:08,599 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,SelfDestructingSolverStorable20 [2023-11-17 12:38:08,599 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:38:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash 887617191, now seen corresponding path program 6 times [2023-11-17 12:38:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639071621] [2023-11-17 12:38:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:08,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:08,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639071621] [2023-11-17 12:38:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639071621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:08,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517129761] [2023-11-17 12:38:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:38:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:08,709 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 12:38:08,729 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 12:38:08,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:38:08,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:08,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:08,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:08,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:08,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517129761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:08,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:08,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 12:38:08,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626907037] [2023-11-17 12:38:08,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:38:08,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:38:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:38:08,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:08,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 40 transitions, 386 flow. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 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 12:38:08,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:08,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:08,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:09,271 INFO L124 PetriNetUnfolderBase]: 55/123 cut-off events. [2023-11-17 12:38:09,272 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2023-11-17 12:38:09,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 123 events. 55/123 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 337 event pairs, 1 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 679. Up to 37 conditions per place. [2023-11-17 12:38:09,273 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 32 selfloop transitions, 21 changer transitions 10/63 dead transitions. [2023-11-17 12:38:09,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 63 transitions, 633 flow [2023-11-17 12:38:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:38:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:38:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 94 transitions. [2023-11-17 12:38:09,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23979591836734693 [2023-11-17 12:38:09,274 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 94 transitions. [2023-11-17 12:38:09,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 94 transitions. [2023-11-17 12:38:09,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:09,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 94 transitions. [2023-11-17 12:38:09,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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 12:38:09,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 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 12:38:09,275 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 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 12:38:09,275 INFO L175 Difference]: Start difference. First operand has 81 places, 40 transitions, 386 flow. Second operand 14 states and 94 transitions. [2023-11-17 12:38:09,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 63 transitions, 633 flow [2023-11-17 12:38:09,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 63 transitions, 555 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-11-17 12:38:09,279 INFO L231 Difference]: Finished difference. Result has 79 places, 40 transitions, 377 flow [2023-11-17 12:38:09,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=377, PETRI_PLACES=79, PETRI_TRANSITIONS=40} [2023-11-17 12:38:09,279 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-11-17 12:38:09,279 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 40 transitions, 377 flow [2023-11-17 12:38:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 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 12:38:09,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:09,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:09,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:38:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:09,485 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:38:09,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2123535321, now seen corresponding path program 7 times [2023-11-17 12:38:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:09,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916525782] [2023-11-17 12:38:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:09,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:09,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916525782] [2023-11-17 12:38:09,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916525782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:09,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893590758] [2023-11-17 12:38:09,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:38:09,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:09,580 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 12:38:09,583 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 12:38:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:09,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:09,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:09,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:09,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893590758] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:09,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:09,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:38:09,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693129271] [2023-11-17 12:38:09,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:09,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:38:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:09,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:38:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:38:09,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:09,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 40 transitions, 377 flow. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 12:38:09,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:09,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:09,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:10,102 INFO L124 PetriNetUnfolderBase]: 55/115 cut-off events. [2023-11-17 12:38:10,102 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2023-11-17 12:38:10,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 115 events. 55/115 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 290 event pairs, 3 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 631. Up to 32 conditions per place. [2023-11-17 12:38:10,103 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 23 selfloop transitions, 11 changer transitions 22/56 dead transitions. [2023-11-17 12:38:10,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 56 transitions, 585 flow [2023-11-17 12:38:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:38:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:38:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 71 transitions. [2023-11-17 12:38:10,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2305194805194805 [2023-11-17 12:38:10,104 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 71 transitions. [2023-11-17 12:38:10,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 71 transitions. [2023-11-17 12:38:10,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:10,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 71 transitions. [2023-11-17 12:38:10,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 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 12:38:10,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:10,105 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 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 12:38:10,105 INFO L175 Difference]: Start difference. First operand has 79 places, 40 transitions, 377 flow. Second operand 11 states and 71 transitions. [2023-11-17 12:38:10,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 56 transitions, 585 flow [2023-11-17 12:38:10,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 56 transitions, 535 flow, removed 15 selfloop flow, removed 8 redundant places. [2023-11-17 12:38:10,109 INFO L231 Difference]: Finished difference. Result has 78 places, 28 transitions, 248 flow [2023-11-17 12:38:10,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=248, PETRI_PLACES=78, PETRI_TRANSITIONS=28} [2023-11-17 12:38:10,109 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-17 12:38:10,109 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 28 transitions, 248 flow [2023-11-17 12:38:10,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 12:38:10,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:38:10,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:38:10,120 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 12:38:10,315 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,SelfDestructingSolverStorable22 [2023-11-17 12:38:10,316 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:38:10,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:38:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash 525635081, now seen corresponding path program 8 times [2023-11-17 12:38:10,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:38:10,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726355907] [2023-11-17 12:38:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:38:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:38:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:38:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:10,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:38:10,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726355907] [2023-11-17 12:38:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726355907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:38:10,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839971737] [2023-11-17 12:38:10,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:38:10,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:38:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:38:10,413 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 12:38:10,432 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 12:38:10,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:38:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:38:10,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:38:10,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:38:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:10,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:38:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:38:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839971737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:38:10,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:38:10,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:38:10,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245000619] [2023-11-17 12:38:10,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:38:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:38:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:38:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:38:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:38:10,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:38:10,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 28 transitions, 248 flow. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 12:38:10,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:38:10,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:38:10,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:38:10,863 INFO L124 PetriNetUnfolderBase]: 32/70 cut-off events. [2023-11-17 12:38:10,864 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2023-11-17 12:38:10,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 70 events. 32/70 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 138 event pairs, 3 based on Foata normal form. 1/71 useless extension candidates. Maximal degree in co-relation 365. Up to 23 conditions per place. [2023-11-17 12:38:10,864 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-11-17 12:38:10,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 34 transitions, 336 flow [2023-11-17 12:38:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:38:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:38:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 54 transitions. [2023-11-17 12:38:10,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21428571428571427 [2023-11-17 12:38:10,865 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 54 transitions. [2023-11-17 12:38:10,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 54 transitions. [2023-11-17 12:38:10,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:38:10,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 54 transitions. [2023-11-17 12:38:10,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 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 12:38:10,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 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 12:38:10,866 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 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 12:38:10,866 INFO L175 Difference]: Start difference. First operand has 78 places, 28 transitions, 248 flow. Second operand 9 states and 54 transitions. [2023-11-17 12:38:10,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 34 transitions, 336 flow [2023-11-17 12:38:10,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 34 transitions, 284 flow, removed 3 selfloop flow, removed 14 redundant places. [2023-11-17 12:38:10,869 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-11-17 12:38:10,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-11-17 12:38:10,869 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-11-17 12:38:10,869 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-11-17 12:38:10,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 12:38:10,871 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:38:10,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:38:10,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:38:10,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:38:11,072 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,SelfDestructingSolverStorable23 [2023-11-17 12:38:11,073 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 5, 5] [2023-11-17 12:38:11,075 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:38:11,075 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:38:11,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:38:11 BasicIcfg [2023-11-17 12:38:11,077 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:38:11,077 INFO L158 Benchmark]: Toolchain (without parser) took 12879.82ms. Allocated memory was 188.7MB in the beginning and 320.9MB in the end (delta: 132.1MB). Free memory was 138.7MB in the beginning and 172.9MB in the end (delta: -34.2MB). Peak memory consumption was 98.4MB. Max. memory is 8.0GB. [2023-11-17 12:38:11,077 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:38:11,078 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.31ms. Allocated memory is still 188.7MB. Free memory was 138.7MB in the beginning and 127.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-11-17 12:38:11,078 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.86ms. Allocated memory is still 188.7MB. Free memory was 127.6MB in the beginning and 126.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:38:11,078 INFO L158 Benchmark]: Boogie Preprocessor took 29.85ms. Allocated memory is still 188.7MB. Free memory was 125.9MB in the beginning and 124.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:38:11,078 INFO L158 Benchmark]: RCFGBuilder took 423.05ms. Allocated memory is still 188.7MB. Free memory was 124.9MB in the beginning and 102.8MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 12:38:11,079 INFO L158 Benchmark]: TraceAbstraction took 12166.07ms. Allocated memory was 188.7MB in the beginning and 320.9MB in the end (delta: 132.1MB). Free memory was 102.1MB in the beginning and 172.9MB in the end (delta: -70.8MB). Peak memory consumption was 61.7MB. Max. memory is 8.0GB. [2023-11-17 12:38:11,079 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 135.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.31ms. Allocated memory is still 188.7MB. Free memory was 138.7MB in the beginning and 127.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.86ms. Allocated memory is still 188.7MB. Free memory was 127.6MB in the beginning and 126.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.85ms. Allocated memory is still 188.7MB. Free memory was 125.9MB in the beginning and 124.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 423.05ms. Allocated memory is still 188.7MB. Free memory was 124.9MB in the beginning and 102.8MB in the end (delta: 22.0MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 12166.07ms. Allocated memory was 188.7MB in the beginning and 320.9MB in the end (delta: 132.1MB). Free memory was 102.1MB in the beginning and 172.9MB in the end (delta: -70.8MB). Peak memory consumption was 61.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 25 PlacesBefore, 20 PlacesAfterwards, 20 TransitionsBefore, 15 TransitionsAfterwards, 110 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 105 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 105, independent: 105, independent conditional: 0, independent unconditional: 105, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 64, independent: 64, independent conditional: 0, independent unconditional: 64, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 64, independent: 61, independent conditional: 0, independent unconditional: 61, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, independent: 3, independent conditional: 0, independent unconditional: 3, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15, independent: 15, independent conditional: 0, independent unconditional: 15, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 105, independent: 41, independent conditional: 0, independent unconditional: 41, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 64, unknown conditional: 0, unknown unconditional: 64] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.0s, OverallIterations: 24, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 729 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 729 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 158 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4116 IncrementalHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 158 mSolverCounterUnsat, 0 mSDtfsCounter, 4116 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 548 GetRequests, 270 SyntacticMatches, 3 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=744occurred in iteration=13, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 500 NumberOfCodeBlocks, 500 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 3127 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1366 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 46 InterpolantComputations, 16 PerfectInterpolantSequences, 11/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 12:38:11,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...