/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:14:26,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:14:26,310 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 12:14:26,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:14:26,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:14:26,351 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:14:26,352 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:14:26,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:14:26,353 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:14:26,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:14:26,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:14:26,357 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:14:26,357 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:14:26,358 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:14:26,358 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:14:26,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:14:26,359 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:14:26,359 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:14:26,359 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:14:26,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:14:26,360 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:14:26,360 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:14:26,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:14:26,361 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:14:26,361 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:14:26,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:14:26,361 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:14:26,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:14:26,362 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:14:26,362 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:14:26,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:14:26,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:14:26,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:14:26,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:14:26,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:14:26,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:14:26,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:14:26,596 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:14:26,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-11-17 12:14:27,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:14:27,923 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:14:27,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-11-17 12:14:27,929 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94477cc6b/a8d50c53e8bd413d822bd11015c8a90b/FLAGf698e3bbe [2023-11-17 12:14:27,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94477cc6b/a8d50c53e8bd413d822bd11015c8a90b [2023-11-17 12:14:27,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:14:27,943 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:14:27,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:14:27,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:14:27,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:14:27,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:14:27" (1/1) ... [2023-11-17 12:14:27,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4134dadc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:27, skipping insertion in model container [2023-11-17 12:14:27,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:14:27" (1/1) ... [2023-11-17 12:14:27,972 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:14:28,160 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-17 12:14:28,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:14:28,185 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:14:28,222 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2023-11-17 12:14:28,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:14:28,233 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:14:28,233 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:14:28,241 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:14:28,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28 WrapperNode [2023-11-17 12:14:28,243 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:14:28,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:14:28,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:14:28,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:14:28,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,305 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 203 [2023-11-17 12:14:28,305 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:14:28,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:14:28,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:14:28,306 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:14:28,314 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:14:28,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:14:28,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:14:28,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:14:28,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (1/1) ... [2023-11-17 12:14:28,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:14:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:28,385 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 12:14:28,409 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 12:14:28,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:14:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:14:28,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:14:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:14:28,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:14:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:14:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:14:28,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:14:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:14:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:14:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:14:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:14:28,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:14:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:14:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:14:28,420 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 12:14:28,520 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:14:28,523 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:14:28,816 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:14:29,124 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:14:29,125 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 12:14:29,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:14:29 BoogieIcfgContainer [2023-11-17 12:14:29,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:14:29,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:14:29,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:14:29,131 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:14:29,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:14:27" (1/3) ... [2023-11-17 12:14:29,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41365092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:14:29, skipping insertion in model container [2023-11-17 12:14:29,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:28" (2/3) ... [2023-11-17 12:14:29,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41365092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:14:29, skipping insertion in model container [2023-11-17 12:14:29,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:14:29" (3/3) ... [2023-11-17 12:14:29,134 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-11-17 12:14:29,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:14:29,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:14:29,150 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:14:29,197 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:14:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2023-11-17 12:14:29,263 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-17 12:14:29,264 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:14:29,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:14:29,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2023-11-17 12:14:29,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2023-11-17 12:14:29,278 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:14:29,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 24 transitions, 60 flow [2023-11-17 12:14:29,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 24 transitions, 60 flow [2023-11-17 12:14:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 60 flow [2023-11-17 12:14:29,306 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2023-11-17 12:14:29,306 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:14:29,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:14:29,307 INFO L119 LiptonReduction]: Number of co-enabled transitions 110 [2023-11-17 12:14:30,063 INFO L134 LiptonReduction]: Checked pairs total: 146 [2023-11-17 12:14:30,063 INFO L136 LiptonReduction]: Total number of compositions: 5 [2023-11-17 12:14:30,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:14:30,091 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;@6f18d9ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:14:30,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:14:30,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:14:30,099 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2023-11-17 12:14:30,099 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:14:30,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:30,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:30,100 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 12:14:30,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1119501354, now seen corresponding path program 1 times [2023-11-17 12:14:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:30,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596299293] [2023-11-17 12:14:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:30,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:30,374 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 12:14:30,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:30,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596299293] [2023-11-17 12:14:30,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596299293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:30,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:30,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:14:30,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740258404] [2023-11-17 12:14:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:14:30,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:14:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:14:30,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:14:30,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:30,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:14:30,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:30,506 INFO L124 PetriNetUnfolderBase]: 76/138 cut-off events. [2023-11-17 12:14:30,506 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-17 12:14:30,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 138 events. 76/138 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 353 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-17 12:14:30,509 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2023-11-17 12:14:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 31 transitions, 145 flow [2023-11-17 12:14:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:14:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:14:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-17 12:14:30,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-11-17 12:14:30,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-17 12:14:30,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-17 12:14:30,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:30,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-17 12:14:30,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,527 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 47 transitions. [2023-11-17 12:14:30,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 31 transitions, 145 flow [2023-11-17 12:14:30,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:14:30,535 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-11-17 12:14:30,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-11-17 12:14:30,540 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-17 12:14:30,540 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-11-17 12:14:30,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:30,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:30,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:14:30,541 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 12:14:30,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1403293873, now seen corresponding path program 1 times [2023-11-17 12:14:30,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:30,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484402502] [2023-11-17 12:14:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:30,792 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 12:14:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484402502] [2023-11-17 12:14:30,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484402502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:30,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:30,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:14:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573921200] [2023-11-17 12:14:30,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:14:30,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:14:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:14:30,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:14:30,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:30,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:14:30,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:30,922 INFO L124 PetriNetUnfolderBase]: 101/197 cut-off events. [2023-11-17 12:14:30,923 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-17 12:14:30,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 197 events. 101/197 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 591 event pairs, 72 based on Foata normal form. 16/209 useless extension candidates. Maximal degree in co-relation 244. Up to 139 conditions per place. [2023-11-17 12:14:30,929 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 20 selfloop transitions, 2 changer transitions 14/36 dead transitions. [2023-11-17 12:14:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 36 transitions, 167 flow [2023-11-17 12:14:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:14:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:14:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2023-11-17 12:14:30,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-17 12:14:30,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 56 transitions. [2023-11-17 12:14:30,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 56 transitions. [2023-11-17 12:14:30,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:30,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 56 transitions. [2023-11-17 12:14:30,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,939 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 4 states and 56 transitions. [2023-11-17 12:14:30,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 36 transitions, 167 flow [2023-11-17 12:14:30,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:30,941 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 74 flow [2023-11-17 12:14:30,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-17 12:14:30,943 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-17 12:14:30,944 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 74 flow [2023-11-17 12:14:30,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:30,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:30,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:14:30,946 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 12:14:30,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash -723433496, now seen corresponding path program 1 times [2023-11-17 12:14:30,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:30,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436587780] [2023-11-17 12:14:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:30,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:31,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:31,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436587780] [2023-11-17 12:14:31,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436587780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334458832] [2023-11-17 12:14:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:31,109 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 12:14:31,139 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 12:14:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:31,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:31,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:31,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 12:14:31,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334458832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:31,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 12:14:31,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-17 12:14:31,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171946647] [2023-11-17 12:14:31,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:31,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:14:31,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:14:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-17 12:14:31,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:14:31,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:31,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:14:31,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:31,396 INFO L124 PetriNetUnfolderBase]: 100/196 cut-off events. [2023-11-17 12:14:31,396 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-11-17 12:14:31,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 196 events. 100/196 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 589 event pairs, 72 based on Foata normal form. 16/209 useless extension candidates. Maximal degree in co-relation 449. Up to 140 conditions per place. [2023-11-17 12:14:31,398 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 21 selfloop transitions, 2 changer transitions 12/35 dead transitions. [2023-11-17 12:14:31,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 35 transitions, 174 flow [2023-11-17 12:14:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:14:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:14:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2023-11-17 12:14:31,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2023-11-17 12:14:31,400 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 54 transitions. [2023-11-17 12:14:31,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 54 transitions. [2023-11-17 12:14:31,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:31,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 54 transitions. [2023-11-17 12:14:31,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 13.5) internal successors, (54), 4 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 12:14:31,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,401 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,401 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 74 flow. Second operand 4 states and 54 transitions. [2023-11-17 12:14:31,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 35 transitions, 174 flow [2023-11-17 12:14:31,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 35 transitions, 166 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:31,403 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 82 flow [2023-11-17 12:14:31,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-17 12:14:31,404 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-17 12:14:31,404 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 82 flow [2023-11-17 12:14:31,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:31,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:31,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:31,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:31,611 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 12:14:31,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:31,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1028538577, now seen corresponding path program 1 times [2023-11-17 12:14:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819041544] [2023-11-17 12:14:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:31,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819041544] [2023-11-17 12:14:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819041544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985408335] [2023-11-17 12:14:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:31,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:31,688 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 12:14:31,707 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 12:14:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:31,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:31,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:31,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985408335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:31,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:31,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:14:31,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147119318] [2023-11-17 12:14:31,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:31,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:14:31,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:31,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:14:31,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:14:31,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:31,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:31,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:31,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:32,058 INFO L124 PetriNetUnfolderBase]: 100/184 cut-off events. [2023-11-17 12:14:32,058 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-17 12:14:32,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 184 events. 100/184 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 557 event pairs, 27 based on Foata normal form. 6/189 useless extension candidates. Maximal degree in co-relation 438. Up to 78 conditions per place. [2023-11-17 12:14:32,061 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 46 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2023-11-17 12:14:32,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 56 transitions, 286 flow [2023-11-17 12:14:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:14:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:14:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-17 12:14:32,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33035714285714285 [2023-11-17 12:14:32,064 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-17 12:14:32,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-17 12:14:32,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:32,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-17 12:14:32,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 12:14:32,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,067 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,067 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 82 flow. Second operand 7 states and 74 transitions. [2023-11-17 12:14:32,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 56 transitions, 286 flow [2023-11-17 12:14:32,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 56 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:32,069 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 146 flow [2023-11-17 12:14:32,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=146, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-17 12:14:32,071 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-17 12:14:32,071 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 146 flow [2023-11-17 12:14:32,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:32,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:32,083 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 12:14:32,281 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,SelfDestructingSolverStorable3 [2023-11-17 12:14:32,281 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 12:14:32,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1979791440, now seen corresponding path program 1 times [2023-11-17 12:14:32,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:32,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570046019] [2023-11-17 12:14:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:32,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:32,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:32,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570046019] [2023-11-17 12:14:32,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570046019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:32,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:32,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:32,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780703419] [2023-11-17 12:14:32,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:32,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:32,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:32,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:32,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:32,441 INFO L124 PetriNetUnfolderBase]: 103/191 cut-off events. [2023-11-17 12:14:32,441 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-11-17 12:14:32,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 191 events. 103/191 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 613 event pairs, 24 based on Foata normal form. 4/194 useless extension candidates. Maximal degree in co-relation 644. Up to 104 conditions per place. [2023-11-17 12:14:32,443 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 41 selfloop transitions, 4 changer transitions 7/52 dead transitions. [2023-11-17 12:14:32,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 337 flow [2023-11-17 12:14:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-17 12:14:32,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35625 [2023-11-17 12:14:32,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-17 12:14:32,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-17 12:14:32,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:32,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-17 12:14:32,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,445 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,446 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 146 flow. Second operand 5 states and 57 transitions. [2023-11-17 12:14:32,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 337 flow [2023-11-17 12:14:32,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 325 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:32,450 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 149 flow [2023-11-17 12:14:32,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-11-17 12:14:32,452 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2023-11-17 12:14:32,453 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 149 flow [2023-11-17 12:14:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:32,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:32,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:14:32,453 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 12:14:32,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash 688568130, now seen corresponding path program 2 times [2023-11-17 12:14:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:32,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877385282] [2023-11-17 12:14:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:32,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877385282] [2023-11-17 12:14:32,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877385282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843257150] [2023-11-17 12:14:32,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:14:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:32,520 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 12:14:32,523 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 12:14:32,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:32,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:32,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:32,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:32,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843257150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:32,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:32,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:14:32,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387530058] [2023-11-17 12:14:32,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:32,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:14:32,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:14:32,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:14:32,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:32,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 149 flow. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:32,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:32,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:32,846 INFO L124 PetriNetUnfolderBase]: 118/220 cut-off events. [2023-11-17 12:14:32,847 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2023-11-17 12:14:32,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 220 events. 118/220 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 677 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 799. Up to 84 conditions per place. [2023-11-17 12:14:32,849 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 48 selfloop transitions, 14 changer transitions 1/63 dead transitions. [2023-11-17 12:14:32,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 446 flow [2023-11-17 12:14:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:14:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:14:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2023-11-17 12:14:32,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:14:32,850 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 70 transitions. [2023-11-17 12:14:32,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 70 transitions. [2023-11-17 12:14:32,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:32,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 70 transitions. [2023-11-17 12:14:32,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,853 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,853 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 149 flow. Second operand 7 states and 70 transitions. [2023-11-17 12:14:32,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 446 flow [2023-11-17 12:14:32,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 63 transitions, 414 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:32,857 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 244 flow [2023-11-17 12:14:32,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=244, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-17 12:14:32,860 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-11-17 12:14:32,860 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 244 flow [2023-11-17 12:14:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:32,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:32,866 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 12:14:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:33,067 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 12:14:33,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -832608495, now seen corresponding path program 2 times [2023-11-17 12:14:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558383814] [2023-11-17 12:14:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:33,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558383814] [2023-11-17 12:14:33,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558383814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:33,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:33,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:33,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577807606] [2023-11-17 12:14:33,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:33,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:33,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:33,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:33,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:33,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:33,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:33,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:33,224 INFO L124 PetriNetUnfolderBase]: 126/232 cut-off events. [2023-11-17 12:14:33,225 INFO L125 PetriNetUnfolderBase]: For 686/686 co-relation queries the response was YES. [2023-11-17 12:14:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 232 events. 126/232 cut-off events. For 686/686 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 733 event pairs, 51 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 981. Up to 192 conditions per place. [2023-11-17 12:14:33,227 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 37 selfloop transitions, 12 changer transitions 3/52 dead transitions. [2023-11-17 12:14:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 450 flow [2023-11-17 12:14:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-17 12:14:33,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:14:33,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-17 12:14:33,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-17 12:14:33,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:33,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-17 12:14:33,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,231 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 244 flow. Second operand 5 states and 50 transitions. [2023-11-17 12:14:33,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 450 flow [2023-11-17 12:14:33,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 433 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:33,235 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 310 flow [2023-11-17 12:14:33,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-11-17 12:14:33,236 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-11-17 12:14:33,236 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 310 flow [2023-11-17 12:14:33,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:33,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:33,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:14:33,237 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 12:14:33,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2059902800, now seen corresponding path program 3 times [2023-11-17 12:14:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651663494] [2023-11-17 12:14:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:33,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651663494] [2023-11-17 12:14:33,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651663494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:33,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:33,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258214658] [2023-11-17 12:14:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:33,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:33,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:33,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:33,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:33,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:33,406 INFO L124 PetriNetUnfolderBase]: 126/234 cut-off events. [2023-11-17 12:14:33,407 INFO L125 PetriNetUnfolderBase]: For 969/969 co-relation queries the response was YES. [2023-11-17 12:14:33,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 234 events. 126/234 cut-off events. For 969/969 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 748 event pairs, 37 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 1061. Up to 190 conditions per place. [2023-11-17 12:14:33,409 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 37 selfloop transitions, 14 changer transitions 5/56 dead transitions. [2023-11-17 12:14:33,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 511 flow [2023-11-17 12:14:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:14:33,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325 [2023-11-17 12:14:33,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:14:33,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:14:33,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:33,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:14:33,411 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 12:14:33,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,413 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,413 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 310 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:14:33,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 511 flow [2023-11-17 12:14:33,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 475 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:33,418 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 364 flow [2023-11-17 12:14:33,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-11-17 12:14:33,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 33 predicate places. [2023-11-17 12:14:33,420 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 364 flow [2023-11-17 12:14:33,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:33,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:33,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 12:14:33,420 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 12:14:33,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1632926804, now seen corresponding path program 4 times [2023-11-17 12:14:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368490393] [2023-11-17 12:14:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:33,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368490393] [2023-11-17 12:14:33,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368490393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:33,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:33,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:33,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496237153] [2023-11-17 12:14:33,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:33,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:33,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:33,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:33,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 364 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:33,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:33,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:33,571 INFO L124 PetriNetUnfolderBase]: 127/235 cut-off events. [2023-11-17 12:14:33,571 INFO L125 PetriNetUnfolderBase]: For 1082/1082 co-relation queries the response was YES. [2023-11-17 12:14:33,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1165 conditions, 235 events. 127/235 cut-off events. For 1082/1082 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 754 event pairs, 37 based on Foata normal form. 4/238 useless extension candidates. Maximal degree in co-relation 1131. Up to 192 conditions per place. [2023-11-17 12:14:33,573 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 40 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-11-17 12:14:33,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 536 flow [2023-11-17 12:14:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-17 12:14:33,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31875 [2023-11-17 12:14:33,575 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-17 12:14:33,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-17 12:14:33,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:33,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-17 12:14:33,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,576 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,576 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 364 flow. Second operand 5 states and 51 transitions. [2023-11-17 12:14:33,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 536 flow [2023-11-17 12:14:33,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 500 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:33,581 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 369 flow [2023-11-17 12:14:33,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2023-11-17 12:14:33,583 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 34 predicate places. [2023-11-17 12:14:33,583 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 369 flow [2023-11-17 12:14:33,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:33,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 12:14:33,583 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 12:14:33,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -258419165, now seen corresponding path program 3 times [2023-11-17 12:14:33,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954343061] [2023-11-17 12:14:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:33,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954343061] [2023-11-17 12:14:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954343061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:33,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:33,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236768830] [2023-11-17 12:14:33,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:33,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:33,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:33,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:33,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:33,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:33,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:33,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:33,786 INFO L124 PetriNetUnfolderBase]: 128/238 cut-off events. [2023-11-17 12:14:33,786 INFO L125 PetriNetUnfolderBase]: For 1033/1033 co-relation queries the response was YES. [2023-11-17 12:14:33,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 238 events. 128/238 cut-off events. For 1033/1033 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 764 event pairs, 32 based on Foata normal form. 2/239 useless extension candidates. Maximal degree in co-relation 1143. Up to 160 conditions per place. [2023-11-17 12:14:33,789 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 47 selfloop transitions, 12 changer transitions 4/63 dead transitions. [2023-11-17 12:14:33,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 596 flow [2023-11-17 12:14:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2023-11-17 12:14:33,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33125 [2023-11-17 12:14:33,790 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 53 transitions. [2023-11-17 12:14:33,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 53 transitions. [2023-11-17 12:14:33,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:33,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 53 transitions. [2023-11-17 12:14:33,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,792 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,792 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 369 flow. Second operand 5 states and 53 transitions. [2023-11-17 12:14:33,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 596 flow [2023-11-17 12:14:33,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 554 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:33,797 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 367 flow [2023-11-17 12:14:33,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2023-11-17 12:14:33,798 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-11-17 12:14:33,798 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 367 flow [2023-11-17 12:14:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:33,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 12:14:33,800 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 12:14:33,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2136586164, now seen corresponding path program 5 times [2023-11-17 12:14:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718868298] [2023-11-17 12:14:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:33,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718868298] [2023-11-17 12:14:33,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718868298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:33,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:33,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244355489] [2023-11-17 12:14:33,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:33,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:33,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:33,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:33,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:33,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 367 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:33,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:33,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:33,985 INFO L124 PetriNetUnfolderBase]: 121/229 cut-off events. [2023-11-17 12:14:33,985 INFO L125 PetriNetUnfolderBase]: For 1147/1147 co-relation queries the response was YES. [2023-11-17 12:14:33,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 229 events. 121/229 cut-off events. For 1147/1147 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 743 event pairs, 38 based on Foata normal form. 4/232 useless extension candidates. Maximal degree in co-relation 1091. Up to 183 conditions per place. [2023-11-17 12:14:33,987 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 37 selfloop transitions, 14 changer transitions 5/56 dead transitions. [2023-11-17 12:14:33,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 529 flow [2023-11-17 12:14:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2023-11-17 12:14:33,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31875 [2023-11-17 12:14:33,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 51 transitions. [2023-11-17 12:14:33,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 51 transitions. [2023-11-17 12:14:33,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:33,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 51 transitions. [2023-11-17 12:14:33,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,991 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,991 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 367 flow. Second operand 5 states and 51 transitions. [2023-11-17 12:14:33,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 529 flow [2023-11-17 12:14:33,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 56 transitions, 502 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:33,995 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 366 flow [2023-11-17 12:14:33,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=366, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2023-11-17 12:14:33,996 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 38 predicate places. [2023-11-17 12:14:33,996 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 366 flow [2023-11-17 12:14:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:33,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:33,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:14:33,997 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 12:14:33,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash 825323337, now seen corresponding path program 4 times [2023-11-17 12:14:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147811384] [2023-11-17 12:14:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147811384] [2023-11-17 12:14:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147811384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:34,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873328263] [2023-11-17 12:14:34,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:14:34,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:34,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:34,088 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 12:14:34,111 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 12:14:34,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:14:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:34,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:34,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:34,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:34,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873328263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:34,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:34,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:34,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382446265] [2023-11-17 12:14:34,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:34,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:34,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:34,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:34,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:34,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:34,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:34,425 INFO L124 PetriNetUnfolderBase]: 132/248 cut-off events. [2023-11-17 12:14:34,425 INFO L125 PetriNetUnfolderBase]: For 1167/1167 co-relation queries the response was YES. [2023-11-17 12:14:34,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 248 events. 132/248 cut-off events. For 1167/1167 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 839 event pairs, 24 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 1183. Up to 131 conditions per place. [2023-11-17 12:14:34,428 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 51 selfloop transitions, 25 changer transitions 0/76 dead transitions. [2023-11-17 12:14:34,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 692 flow [2023-11-17 12:14:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:14:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:14:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2023-11-17 12:14:34,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.275 [2023-11-17 12:14:34,429 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 88 transitions. [2023-11-17 12:14:34,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 88 transitions. [2023-11-17 12:14:34,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:34,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 88 transitions. [2023-11-17 12:14:34,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 32.0) internal successors, (352), 11 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,431 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 32.0) internal successors, (352), 11 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,431 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 366 flow. Second operand 10 states and 88 transitions. [2023-11-17 12:14:34,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 692 flow [2023-11-17 12:14:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 658 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 12:14:34,436 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 467 flow [2023-11-17 12:14:34,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=467, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2023-11-17 12:14:34,436 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-11-17 12:14:34,436 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 467 flow [2023-11-17 12:14:34,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:34,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:34,445 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 12:14:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:34,643 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 12:14:34,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1950598447, now seen corresponding path program 5 times [2023-11-17 12:14:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:34,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085251965] [2023-11-17 12:14:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:34,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085251965] [2023-11-17 12:14:34,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085251965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:34,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:34,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869982385] [2023-11-17 12:14:34,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:34,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:34,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 467 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:34,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:34,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:34,800 INFO L124 PetriNetUnfolderBase]: 130/246 cut-off events. [2023-11-17 12:14:34,801 INFO L125 PetriNetUnfolderBase]: For 1307/1307 co-relation queries the response was YES. [2023-11-17 12:14:34,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300 conditions, 246 events. 130/246 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 810 event pairs, 38 based on Foata normal form. 2/247 useless extension candidates. Maximal degree in co-relation 1261. Up to 193 conditions per place. [2023-11-17 12:14:34,803 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 40 selfloop transitions, 17 changer transitions 3/60 dead transitions. [2023-11-17 12:14:34,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 629 flow [2023-11-17 12:14:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2023-11-17 12:14:34,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30625 [2023-11-17 12:14:34,804 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 49 transitions. [2023-11-17 12:14:34,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 49 transitions. [2023-11-17 12:14:34,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:34,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 49 transitions. [2023-11-17 12:14:34,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,805 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,805 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 467 flow. Second operand 5 states and 49 transitions. [2023-11-17 12:14:34,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 629 flow [2023-11-17 12:14:34,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 565 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-17 12:14:34,810 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 438 flow [2023-11-17 12:14:34,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2023-11-17 12:14:34,811 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-11-17 12:14:34,811 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 438 flow [2023-11-17 12:14:34,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:34,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 12:14:34,812 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 12:14:34,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash 514936852, now seen corresponding path program 6 times [2023-11-17 12:14:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:34,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072332214] [2023-11-17 12:14:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:34,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:34,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072332214] [2023-11-17 12:14:34,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072332214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:34,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:34,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:34,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866175781] [2023-11-17 12:14:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:34,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:34,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:34,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:34,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:34,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:34,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:35,000 INFO L124 PetriNetUnfolderBase]: 118/217 cut-off events. [2023-11-17 12:14:35,001 INFO L125 PetriNetUnfolderBase]: For 1196/1196 co-relation queries the response was YES. [2023-11-17 12:14:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 217 events. 118/217 cut-off events. For 1196/1196 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 646 event pairs, 29 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 1092. Up to 159 conditions per place. [2023-11-17 12:14:35,003 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 41 selfloop transitions, 18 changer transitions 1/60 dead transitions. [2023-11-17 12:14:35,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 603 flow [2023-11-17 12:14:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:35,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-17 12:14:35,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 12:14:35,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-17 12:14:35,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-17 12:14:35,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:35,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-17 12:14:35,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,005 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 438 flow. Second operand 5 states and 50 transitions. [2023-11-17 12:14:35,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 603 flow [2023-11-17 12:14:35,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 563 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 12:14:35,009 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 421 flow [2023-11-17 12:14:35,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-11-17 12:14:35,009 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 45 predicate places. [2023-11-17 12:14:35,010 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 421 flow [2023-11-17 12:14:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:35,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:35,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 12:14:35,010 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 12:14:35,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:35,011 INFO L85 PathProgramCache]: Analyzing trace with hash -234038679, now seen corresponding path program 6 times [2023-11-17 12:14:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:35,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897679288] [2023-11-17 12:14:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897679288] [2023-11-17 12:14:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897679288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:35,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:35,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909919305] [2023-11-17 12:14:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:35,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:35,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:35,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:35,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:35,186 INFO L124 PetriNetUnfolderBase]: 107/192 cut-off events. [2023-11-17 12:14:35,187 INFO L125 PetriNetUnfolderBase]: For 1040/1040 co-relation queries the response was YES. [2023-11-17 12:14:35,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 192 events. 107/192 cut-off events. For 1040/1040 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 543 event pairs, 26 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 947. Up to 142 conditions per place. [2023-11-17 12:14:35,188 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 43 selfloop transitions, 16 changer transitions 1/60 dead transitions. [2023-11-17 12:14:35,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 579 flow [2023-11-17 12:14:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:14:35,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325 [2023-11-17 12:14:35,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:14:35,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:14:35,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:35,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:14:35,190 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 12:14:35,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,191 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,191 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 421 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:14:35,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 579 flow [2023-11-17 12:14:35,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 533 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-17 12:14:35,195 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 390 flow [2023-11-17 12:14:35,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=390, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-11-17 12:14:35,195 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 42 predicate places. [2023-11-17 12:14:35,195 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 390 flow [2023-11-17 12:14:35,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:35,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:35,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 12:14:35,196 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 12:14:35,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1089682621, now seen corresponding path program 1 times [2023-11-17 12:14:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156179232] [2023-11-17 12:14:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:35,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156179232] [2023-11-17 12:14:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156179232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791346153] [2023-11-17 12:14:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:35,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:35,339 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 12:14:35,355 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 12:14:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:35,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:14:35,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:35,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:35,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2023-11-17 12:14:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791346153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:35,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:35,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-17 12:14:35,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323810635] [2023-11-17 12:14:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:14:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:14:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:14:35,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:14:35,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 390 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 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 12:14:35,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:35,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:14:35,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:35,755 INFO L124 PetriNetUnfolderBase]: 295/528 cut-off events. [2023-11-17 12:14:35,755 INFO L125 PetriNetUnfolderBase]: For 2215/2215 co-relation queries the response was YES. [2023-11-17 12:14:35,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551 conditions, 528 events. 295/528 cut-off events. For 2215/2215 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2117 event pairs, 42 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 2222. Up to 177 conditions per place. [2023-11-17 12:14:35,759 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 91 selfloop transitions, 34 changer transitions 12/137 dead transitions. [2023-11-17 12:14:35,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 137 transitions, 1300 flow [2023-11-17 12:14:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:14:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:14:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2023-11-17 12:14:35,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2023-11-17 12:14:35,760 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 115 transitions. [2023-11-17 12:14:35,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 115 transitions. [2023-11-17 12:14:35,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:35,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 115 transitions. [2023-11-17 12:14:35,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 32.0) internal successors, (288), 9 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,763 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 32.0) internal successors, (288), 9 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,763 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 390 flow. Second operand 8 states and 115 transitions. [2023-11-17 12:14:35,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 137 transitions, 1300 flow [2023-11-17 12:14:35,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 137 transitions, 1180 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-11-17 12:14:35,771 INFO L231 Difference]: Finished difference. Result has 69 places, 80 transitions, 776 flow [2023-11-17 12:14:35,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=776, PETRI_PLACES=69, PETRI_TRANSITIONS=80} [2023-11-17 12:14:35,771 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 47 predicate places. [2023-11-17 12:14:35,771 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 80 transitions, 776 flow [2023-11-17 12:14:35,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 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 12:14:35,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:35,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:35,781 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 12:14:35,982 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,SelfDestructingSolverStorable15 [2023-11-17 12:14:35,982 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 12:14:35,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1176637581, now seen corresponding path program 2 times [2023-11-17 12:14:35,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:35,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872116542] [2023-11-17 12:14:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:35,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:36,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:36,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872116542] [2023-11-17 12:14:36,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872116542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:36,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064027165] [2023-11-17 12:14:36,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:14:36,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:36,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:36,198 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 12:14:36,217 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 12:14:36,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:36,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:14:36,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:36,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:36,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2023-11-17 12:14:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064027165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:36,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-17 12:14:36,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003393032] [2023-11-17 12:14:36,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:36,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:14:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:14:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:14:36,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:14:36,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 80 transitions, 776 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:36,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:14:36,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:36,724 INFO L124 PetriNetUnfolderBase]: 691/1248 cut-off events. [2023-11-17 12:14:36,725 INFO L125 PetriNetUnfolderBase]: For 5197/5197 co-relation queries the response was YES. [2023-11-17 12:14:36,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6283 conditions, 1248 events. 691/1248 cut-off events. For 5197/5197 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6440 event pairs, 128 based on Foata normal form. 5/1249 useless extension candidates. Maximal degree in co-relation 5846. Up to 489 conditions per place. [2023-11-17 12:14:36,735 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 115 selfloop transitions, 56 changer transitions 24/195 dead transitions. [2023-11-17 12:14:36,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 195 transitions, 2214 flow [2023-11-17 12:14:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:14:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:14:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2023-11-17 12:14:36,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578125 [2023-11-17 12:14:36,736 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 109 transitions. [2023-11-17 12:14:36,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 109 transitions. [2023-11-17 12:14:36,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:36,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 109 transitions. [2023-11-17 12:14:36,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 32.0) internal successors, (288), 9 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,738 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 32.0) internal successors, (288), 9 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,738 INFO L175 Difference]: Start difference. First operand has 69 places, 80 transitions, 776 flow. Second operand 8 states and 109 transitions. [2023-11-17 12:14:36,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 195 transitions, 2214 flow [2023-11-17 12:14:36,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 195 transitions, 2142 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:36,758 INFO L231 Difference]: Finished difference. Result has 80 places, 125 transitions, 1541 flow [2023-11-17 12:14:36,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1541, PETRI_PLACES=80, PETRI_TRANSITIONS=125} [2023-11-17 12:14:36,759 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-11-17 12:14:36,759 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 125 transitions, 1541 flow [2023-11-17 12:14:36,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:36,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:36,769 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 12:14:36,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:14:36,966 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 12:14:36,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1747516688, now seen corresponding path program 3 times [2023-11-17 12:14:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:36,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767512402] [2023-11-17 12:14:36,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:14:37,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:37,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767512402] [2023-11-17 12:14:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767512402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745233482] [2023-11-17 12:14:37,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:14:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:37,478 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 12:14:37,495 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 12:14:37,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:14:37,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:37,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 12:14:37,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:14:37,874 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:14:37,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 34 [2023-11-17 12:14:37,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-17 12:14:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:37,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:40,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:14:40,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 103 [2023-11-17 12:14:40,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2023-11-17 12:14:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:40,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745233482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:40,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:40,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-11-17 12:14:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179962225] [2023-11-17 12:14:40,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:14:40,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:14:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=502, Unknown=1, NotChecked=0, Total=600 [2023-11-17 12:14:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:14:40,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 125 transitions, 1541 flow. Second operand has 25 states, 25 states have (on average 7.12) internal successors, (178), 25 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:40,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:40,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:14:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:45,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:14:46,390 INFO L124 PetriNetUnfolderBase]: 1154/2099 cut-off events. [2023-11-17 12:14:46,391 INFO L125 PetriNetUnfolderBase]: For 12206/12206 co-relation queries the response was YES. [2023-11-17 12:14:46,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11346 conditions, 2099 events. 1154/2099 cut-off events. For 12206/12206 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12072 event pairs, 215 based on Foata normal form. 5/2097 useless extension candidates. Maximal degree in co-relation 10697. Up to 821 conditions per place. [2023-11-17 12:14:46,412 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 133 selfloop transitions, 121 changer transitions 96/350 dead transitions. [2023-11-17 12:14:46,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 350 transitions, 4395 flow [2023-11-17 12:14:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:14:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:14:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 309 transitions. [2023-11-17 12:14:46,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31149193548387094 [2023-11-17 12:14:46,415 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 309 transitions. [2023-11-17 12:14:46,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 309 transitions. [2023-11-17 12:14:46,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:46,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 309 transitions. [2023-11-17 12:14:46,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.96774193548387) internal successors, (309), 31 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:46,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 32.0) internal successors, (1024), 32 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:46,418 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 32.0) internal successors, (1024), 32 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:46,418 INFO L175 Difference]: Start difference. First operand has 80 places, 125 transitions, 1541 flow. Second operand 31 states and 309 transitions. [2023-11-17 12:14:46,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 350 transitions, 4395 flow [2023-11-17 12:14:46,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 350 transitions, 4287 flow, removed 49 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:46,472 INFO L231 Difference]: Finished difference. Result has 118 places, 201 transitions, 2760 flow [2023-11-17 12:14:46,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2760, PETRI_PLACES=118, PETRI_TRANSITIONS=201} [2023-11-17 12:14:46,473 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 96 predicate places. [2023-11-17 12:14:46,473 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 201 transitions, 2760 flow [2023-11-17 12:14:46,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.12) internal successors, (178), 25 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:46,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:46,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:46,485 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 12:14:46,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:46,680 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 12:14:46,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash -40056378, now seen corresponding path program 4 times [2023-11-17 12:14:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:46,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372921399] [2023-11-17 12:14:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:46,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372921399] [2023-11-17 12:14:46,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372921399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:46,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781096722] [2023-11-17 12:14:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:14:46,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:46,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:46,793 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 12:14:46,813 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 12:14:46,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:14:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:46,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:46,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:46,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781096722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:46,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:14:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682165961] [2023-11-17 12:14:46,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:14:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:14:46,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:14:46,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:46,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 201 transitions, 2760 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:46,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:46,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:46,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:47,505 INFO L124 PetriNetUnfolderBase]: 1110/1977 cut-off events. [2023-11-17 12:14:47,506 INFO L125 PetriNetUnfolderBase]: For 16325/16325 co-relation queries the response was YES. [2023-11-17 12:14:47,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11379 conditions, 1977 events. 1110/1977 cut-off events. For 16325/16325 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10952 event pairs, 266 based on Foata normal form. 88/2058 useless extension candidates. Maximal degree in co-relation 11268. Up to 1468 conditions per place. [2023-11-17 12:14:47,526 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 188 selfloop transitions, 106 changer transitions 3/297 dead transitions. [2023-11-17 12:14:47,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 297 transitions, 4474 flow [2023-11-17 12:14:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:14:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:14:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2023-11-17 12:14:47,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2023-11-17 12:14:47,529 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 96 transitions. [2023-11-17 12:14:47,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 96 transitions. [2023-11-17 12:14:47,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:47,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 96 transitions. [2023-11-17 12:14:47,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,533 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,533 INFO L175 Difference]: Start difference. First operand has 118 places, 201 transitions, 2760 flow. Second operand 11 states and 96 transitions. [2023-11-17 12:14:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 297 transitions, 4474 flow [2023-11-17 12:14:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 297 transitions, 4148 flow, removed 118 selfloop flow, removed 12 redundant places. [2023-11-17 12:14:47,578 INFO L231 Difference]: Finished difference. Result has 117 places, 253 transitions, 3469 flow [2023-11-17 12:14:47,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3469, PETRI_PLACES=117, PETRI_TRANSITIONS=253} [2023-11-17 12:14:47,579 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 95 predicate places. [2023-11-17 12:14:47,579 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 253 transitions, 3469 flow [2023-11-17 12:14:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:47,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:47,590 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 12:14:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:47,791 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 12:14:47,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:47,791 INFO L85 PathProgramCache]: Analyzing trace with hash 24464712, now seen corresponding path program 5 times [2023-11-17 12:14:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:47,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180579800] [2023-11-17 12:14:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:47,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:47,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180579800] [2023-11-17 12:14:47,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180579800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:47,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404478394] [2023-11-17 12:14:47,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:14:47,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:47,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:47,889 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 12:14:47,906 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 12:14:48,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:48,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:48,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:48,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:48,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:14:48,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404478394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:48,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:48,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:14:48,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149473971] [2023-11-17 12:14:48,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:48,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:14:48,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:14:48,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:14:48,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:48,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 253 transitions, 3469 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:48,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:48,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:48,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:48,659 INFO L124 PetriNetUnfolderBase]: 1059/1910 cut-off events. [2023-11-17 12:14:48,659 INFO L125 PetriNetUnfolderBase]: For 15339/15339 co-relation queries the response was YES. [2023-11-17 12:14:48,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12030 conditions, 1910 events. 1059/1910 cut-off events. For 15339/15339 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10739 event pairs, 295 based on Foata normal form. 62/1969 useless extension candidates. Maximal degree in co-relation 11787. Up to 1453 conditions per place. [2023-11-17 12:14:48,687 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 186 selfloop transitions, 119 changer transitions 8/313 dead transitions. [2023-11-17 12:14:48,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 313 transitions, 4882 flow [2023-11-17 12:14:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:14:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:14:48,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 117 transitions. [2023-11-17 12:14:48,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24375 [2023-11-17 12:14:48,688 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 117 transitions. [2023-11-17 12:14:48,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 117 transitions. [2023-11-17 12:14:48,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:48,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 117 transitions. [2023-11-17 12:14:48,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:48,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:48,691 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:48,691 INFO L175 Difference]: Start difference. First operand has 117 places, 253 transitions, 3469 flow. Second operand 15 states and 117 transitions. [2023-11-17 12:14:48,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 313 transitions, 4882 flow [2023-11-17 12:14:48,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 313 transitions, 4374 flow, removed 221 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:48,757 INFO L231 Difference]: Finished difference. Result has 132 places, 267 transitions, 3586 flow [2023-11-17 12:14:48,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3586, PETRI_PLACES=132, PETRI_TRANSITIONS=267} [2023-11-17 12:14:48,757 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 110 predicate places. [2023-11-17 12:14:48,758 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 267 transitions, 3586 flow [2023-11-17 12:14:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:48,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:48,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:48,767 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 12:14:48,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:48,967 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 12:14:48,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1235549052, now seen corresponding path program 6 times [2023-11-17 12:14:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736135818] [2023-11-17 12:14:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:49,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:49,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736135818] [2023-11-17 12:14:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736135818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:49,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957485397] [2023-11-17 12:14:49,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:14:49,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:49,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:49,062 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 12:14:49,083 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 12:14:49,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:14:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:49,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:49,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:49,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:49,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957485397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:49,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:49,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:14:49,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098819389] [2023-11-17 12:14:49,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:14:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:14:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:14:49,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:49,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 267 transitions, 3586 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:14:49,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:49,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:49,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:49,866 INFO L124 PetriNetUnfolderBase]: 1286/2269 cut-off events. [2023-11-17 12:14:49,866 INFO L125 PetriNetUnfolderBase]: For 20468/20468 co-relation queries the response was YES. [2023-11-17 12:14:49,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14351 conditions, 2269 events. 1286/2269 cut-off events. For 20468/20468 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12851 event pairs, 158 based on Foata normal form. 88/2350 useless extension candidates. Maximal degree in co-relation 14019. Up to 952 conditions per place. [2023-11-17 12:14:49,893 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 241 selfloop transitions, 149 changer transitions 8/398 dead transitions. [2023-11-17 12:14:49,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 398 transitions, 6095 flow [2023-11-17 12:14:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:14:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:14:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 119 transitions. [2023-11-17 12:14:49,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.265625 [2023-11-17 12:14:49,895 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 119 transitions. [2023-11-17 12:14:49,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 119 transitions. [2023-11-17 12:14:49,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:49,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 119 transitions. [2023-11-17 12:14:49,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.5) internal successors, (119), 14 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:49,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:49,896 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:49,896 INFO L175 Difference]: Start difference. First operand has 132 places, 267 transitions, 3586 flow. Second operand 14 states and 119 transitions. [2023-11-17 12:14:49,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 398 transitions, 6095 flow [2023-11-17 12:14:49,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 398 transitions, 5810 flow, removed 56 selfloop flow, removed 9 redundant places. [2023-11-17 12:14:49,987 INFO L231 Difference]: Finished difference. Result has 143 places, 332 transitions, 4837 flow [2023-11-17 12:14:49,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4837, PETRI_PLACES=143, PETRI_TRANSITIONS=332} [2023-11-17 12:14:49,987 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 121 predicate places. [2023-11-17 12:14:49,987 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 332 transitions, 4837 flow [2023-11-17 12:14:49,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:14:49,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:49,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:49,993 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 12:14:50,193 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,SelfDestructingSolverStorable20 [2023-11-17 12:14:50,194 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 12:14:50,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1064700510, now seen corresponding path program 7 times [2023-11-17 12:14:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:50,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088023525] [2023-11-17 12:14:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:50,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088023525] [2023-11-17 12:14:50,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088023525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123786537] [2023-11-17 12:14:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:14:50,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:50,314 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 12:14:50,335 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 12:14:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:50,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:50,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:50,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:14:50,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123786537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:50,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:50,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:14:50,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489551305] [2023-11-17 12:14:50,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:50,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:14:50,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:14:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:14:50,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:50,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 332 transitions, 4837 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:50,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:50,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:50,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:51,182 INFO L124 PetriNetUnfolderBase]: 1273/2282 cut-off events. [2023-11-17 12:14:51,182 INFO L125 PetriNetUnfolderBase]: For 22823/22823 co-relation queries the response was YES. [2023-11-17 12:14:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16109 conditions, 2282 events. 1273/2282 cut-off events. For 22823/22823 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13270 event pairs, 151 based on Foata normal form. 62/2337 useless extension candidates. Maximal degree in co-relation 15733. Up to 879 conditions per place. [2023-11-17 12:14:51,208 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 233 selfloop transitions, 187 changer transitions 5/425 dead transitions. [2023-11-17 12:14:51,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 425 transitions, 7120 flow [2023-11-17 12:14:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:14:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:14:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2023-11-17 12:14:51,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25183823529411764 [2023-11-17 12:14:51,210 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 137 transitions. [2023-11-17 12:14:51,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 137 transitions. [2023-11-17 12:14:51,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:51,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 137 transitions. [2023-11-17 12:14:51,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:51,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:51,220 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:51,220 INFO L175 Difference]: Start difference. First operand has 143 places, 332 transitions, 4837 flow. Second operand 17 states and 137 transitions. [2023-11-17 12:14:51,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 425 transitions, 7120 flow [2023-11-17 12:14:51,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 425 transitions, 6370 flow, removed 314 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:51,449 INFO L231 Difference]: Finished difference. Result has 160 places, 366 transitions, 5268 flow [2023-11-17 12:14:51,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5268, PETRI_PLACES=160, PETRI_TRANSITIONS=366} [2023-11-17 12:14:51,450 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 138 predicate places. [2023-11-17 12:14:51,450 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 366 transitions, 5268 flow [2023-11-17 12:14:51,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:51,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:51,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:51,459 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 12:14:51,656 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,SelfDestructingSolverStorable21 [2023-11-17 12:14:51,656 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 12:14:51,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1210660988, now seen corresponding path program 8 times [2023-11-17 12:14:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:51,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446538680] [2023-11-17 12:14:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:51,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:51,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446538680] [2023-11-17 12:14:51,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446538680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:51,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747896660] [2023-11-17 12:14:51,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:14:51,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:51,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:51,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:14:51,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:51,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:51,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:51,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:51,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747896660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:51,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:14:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300149536] [2023-11-17 12:14:51,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:14:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:14:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:14:51,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:51,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 366 transitions, 5268 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:51,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:51,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:51,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:52,615 INFO L124 PetriNetUnfolderBase]: 1354/2411 cut-off events. [2023-11-17 12:14:52,616 INFO L125 PetriNetUnfolderBase]: For 25035/25035 co-relation queries the response was YES. [2023-11-17 12:14:52,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 2411 events. 1354/2411 cut-off events. For 25035/25035 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14097 event pairs, 140 based on Foata normal form. 62/2466 useless extension candidates. Maximal degree in co-relation 16904. Up to 876 conditions per place. [2023-11-17 12:14:52,639 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 225 selfloop transitions, 236 changer transitions 8/469 dead transitions. [2023-11-17 12:14:52,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 469 transitions, 7871 flow [2023-11-17 12:14:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:14:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:14:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2023-11-17 12:14:52,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25390625 [2023-11-17 12:14:52,640 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 130 transitions. [2023-11-17 12:14:52,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 130 transitions. [2023-11-17 12:14:52,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:52,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 130 transitions. [2023-11-17 12:14:52,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.125) internal successors, (130), 16 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,642 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,642 INFO L175 Difference]: Start difference. First operand has 160 places, 366 transitions, 5268 flow. Second operand 16 states and 130 transitions. [2023-11-17 12:14:52,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 469 transitions, 7871 flow [2023-11-17 12:14:52,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 469 transitions, 7270 flow, removed 107 selfloop flow, removed 13 redundant places. [2023-11-17 12:14:52,749 INFO L231 Difference]: Finished difference. Result has 166 places, 413 transitions, 6249 flow [2023-11-17 12:14:52,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6249, PETRI_PLACES=166, PETRI_TRANSITIONS=413} [2023-11-17 12:14:52,750 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 144 predicate places. [2023-11-17 12:14:52,750 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 413 transitions, 6249 flow [2023-11-17 12:14:52,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:52,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:52,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 12:14:52,956 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 12:14:52,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1502706814, now seen corresponding path program 9 times [2023-11-17 12:14:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841897728] [2023-11-17 12:14:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:53,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:53,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841897728] [2023-11-17 12:14:53,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841897728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:53,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905997400] [2023-11-17 12:14:53,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:14:53,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:53,077 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:53,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:14:53,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:14:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:53,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:53,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:53,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:53,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905997400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:53,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:53,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:14:53,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940729403] [2023-11-17 12:14:53,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:53,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:14:53,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:14:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:14:53,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:53,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 413 transitions, 6249 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:14:53,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:53,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:53,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:53,841 INFO L124 PetriNetUnfolderBase]: 1321/2370 cut-off events. [2023-11-17 12:14:53,842 INFO L125 PetriNetUnfolderBase]: For 28148/28148 co-relation queries the response was YES. [2023-11-17 12:14:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17636 conditions, 2370 events. 1321/2370 cut-off events. For 28148/28148 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13956 event pairs, 175 based on Foata normal form. 40/2403 useless extension candidates. Maximal degree in co-relation 17142. Up to 1005 conditions per place. [2023-11-17 12:14:53,866 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 259 selfloop transitions, 202 changer transitions 1/462 dead transitions. [2023-11-17 12:14:53,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 462 transitions, 7784 flow [2023-11-17 12:14:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:14:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:14:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 110 transitions. [2023-11-17 12:14:53,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2644230769230769 [2023-11-17 12:14:53,870 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 110 transitions. [2023-11-17 12:14:53,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 110 transitions. [2023-11-17 12:14:53,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:53,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 110 transitions. [2023-11-17 12:14:53,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:53,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 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 12:14:53,872 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 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 12:14:53,872 INFO L175 Difference]: Start difference. First operand has 166 places, 413 transitions, 6249 flow. Second operand 13 states and 110 transitions. [2023-11-17 12:14:53,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 462 transitions, 7784 flow [2023-11-17 12:14:54,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 462 transitions, 7153 flow, removed 251 selfloop flow, removed 6 redundant places. [2023-11-17 12:14:54,015 INFO L231 Difference]: Finished difference. Result has 173 places, 412 transitions, 5998 flow [2023-11-17 12:14:54,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5998, PETRI_PLACES=173, PETRI_TRANSITIONS=412} [2023-11-17 12:14:54,016 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2023-11-17 12:14:54,016 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 412 transitions, 5998 flow [2023-11-17 12:14:54,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:14:54,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:54,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:54,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:54,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 12:14:54,222 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:54,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 359085325, now seen corresponding path program 10 times [2023-11-17 12:14:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:54,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907278386] [2023-11-17 12:14:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:54,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:54,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907278386] [2023-11-17 12:14:54,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907278386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:54,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525243746] [2023-11-17 12:14:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:14:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:54,336 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:54,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:14:54,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:14:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:54,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:54,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:54,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:54,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525243746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:54,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:54,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:14:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14012954] [2023-11-17 12:14:54,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:54,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:14:54,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:14:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:14:54,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:54,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 412 transitions, 5998 flow. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 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 12:14:54,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:54,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:54,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:55,172 INFO L124 PetriNetUnfolderBase]: 1531/2698 cut-off events. [2023-11-17 12:14:55,172 INFO L125 PetriNetUnfolderBase]: For 36929/36929 co-relation queries the response was YES. [2023-11-17 12:14:55,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 2698 events. 1531/2698 cut-off events. For 36929/36929 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16032 event pairs, 136 based on Foata normal form. 98/2789 useless extension candidates. Maximal degree in co-relation 20285. Up to 1035 conditions per place. [2023-11-17 12:14:55,198 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 356 selfloop transitions, 182 changer transitions 11/549 dead transitions. [2023-11-17 12:14:55,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 549 transitions, 9426 flow [2023-11-17 12:14:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:14:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:14:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2023-11-17 12:14:55,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26171875 [2023-11-17 12:14:55,201 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 134 transitions. [2023-11-17 12:14:55,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 134 transitions. [2023-11-17 12:14:55,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:55,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 134 transitions. [2023-11-17 12:14:55,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.375) internal successors, (134), 16 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:55,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:55,203 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:55,203 INFO L175 Difference]: Start difference. First operand has 173 places, 412 transitions, 5998 flow. Second operand 16 states and 134 transitions. [2023-11-17 12:14:55,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 549 transitions, 9426 flow [2023-11-17 12:14:55,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 549 transitions, 9072 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-11-17 12:14:55,431 INFO L231 Difference]: Finished difference. Result has 186 places, 485 transitions, 7727 flow [2023-11-17 12:14:55,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7727, PETRI_PLACES=186, PETRI_TRANSITIONS=485} [2023-11-17 12:14:55,432 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 164 predicate places. [2023-11-17 12:14:55,432 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 485 transitions, 7727 flow [2023-11-17 12:14:55,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 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 12:14:55,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:55,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:55,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:55,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:55,638 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:55,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1069257131, now seen corresponding path program 11 times [2023-11-17 12:14:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:55,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516369596] [2023-11-17 12:14:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516369596] [2023-11-17 12:14:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516369596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128759073] [2023-11-17 12:14:55,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:14:55,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:55,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:55,749 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:55,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:14:55,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:14:55,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:55,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:55,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:55,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:55,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128759073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:55,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:55,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:14:55,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078897992] [2023-11-17 12:14:55,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:55,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:14:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:55,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:14:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:14:55,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:55,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 485 transitions, 7727 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:14:55,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:55,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:55,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:56,697 INFO L124 PetriNetUnfolderBase]: 1508/2693 cut-off events. [2023-11-17 12:14:56,697 INFO L125 PetriNetUnfolderBase]: For 41635/41635 co-relation queries the response was YES. [2023-11-17 12:14:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21698 conditions, 2693 events. 1508/2693 cut-off events. For 41635/41635 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16365 event pairs, 167 based on Foata normal form. 24/2710 useless extension candidates. Maximal degree in co-relation 21073. Up to 1071 conditions per place. [2023-11-17 12:14:56,724 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 371 selfloop transitions, 161 changer transitions 3/535 dead transitions. [2023-11-17 12:14:56,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 535 transitions, 9515 flow [2023-11-17 12:14:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:14:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:14:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 106 transitions. [2023-11-17 12:14:56,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2548076923076923 [2023-11-17 12:14:56,726 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 106 transitions. [2023-11-17 12:14:56,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 106 transitions. [2023-11-17 12:14:56,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:56,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 106 transitions. [2023-11-17 12:14:56,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:56,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 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 12:14:56,727 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 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 12:14:56,727 INFO L175 Difference]: Start difference. First operand has 186 places, 485 transitions, 7727 flow. Second operand 13 states and 106 transitions. [2023-11-17 12:14:56,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 535 transitions, 9515 flow [2023-11-17 12:14:56,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 535 transitions, 8626 flow, removed 374 selfloop flow, removed 5 redundant places. [2023-11-17 12:14:56,940 INFO L231 Difference]: Finished difference. Result has 195 places, 486 transitions, 7220 flow [2023-11-17 12:14:56,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7220, PETRI_PLACES=195, PETRI_TRANSITIONS=486} [2023-11-17 12:14:56,941 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 173 predicate places. [2023-11-17 12:14:56,941 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 486 transitions, 7220 flow [2023-11-17 12:14:56,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:14:56,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:56,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:56,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:57,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 12:14:57,143 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:57,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1126481919, now seen corresponding path program 12 times [2023-11-17 12:14:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:57,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642536961] [2023-11-17 12:14:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:57,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:57,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642536961] [2023-11-17 12:14:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642536961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:57,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889030702] [2023-11-17 12:14:57,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:14:57,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:57,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:57,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:57,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:14:57,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:14:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:57,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:57,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:57,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889030702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:57,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:14:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358928944] [2023-11-17 12:14:57,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:14:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:14:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:14:57,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:57,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 486 transitions, 7220 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 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 12:14:57,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:57,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:57,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:58,195 INFO L124 PetriNetUnfolderBase]: 1605/2848 cut-off events. [2023-11-17 12:14:58,195 INFO L125 PetriNetUnfolderBase]: For 41909/41909 co-relation queries the response was YES. [2023-11-17 12:14:58,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22767 conditions, 2848 events. 1605/2848 cut-off events. For 41909/41909 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 17372 event pairs, 169 based on Foata normal form. 24/2865 useless extension candidates. Maximal degree in co-relation 22228. Up to 1121 conditions per place. [2023-11-17 12:14:58,218 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 352 selfloop transitions, 200 changer transitions 18/570 dead transitions. [2023-11-17 12:14:58,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 570 transitions, 9742 flow [2023-11-17 12:14:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:14:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:14:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2023-11-17 12:14:58,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23897058823529413 [2023-11-17 12:14:58,219 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 130 transitions. [2023-11-17 12:14:58,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 130 transitions. [2023-11-17 12:14:58,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:58,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 130 transitions. [2023-11-17 12:14:58,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.647058823529412) internal successors, (130), 17 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,221 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,222 INFO L175 Difference]: Start difference. First operand has 195 places, 486 transitions, 7220 flow. Second operand 17 states and 130 transitions. [2023-11-17 12:14:58,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 570 transitions, 9742 flow [2023-11-17 12:14:58,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 570 transitions, 9466 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-11-17 12:14:58,405 INFO L231 Difference]: Finished difference. Result has 208 places, 507 transitions, 8105 flow [2023-11-17 12:14:58,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8105, PETRI_PLACES=208, PETRI_TRANSITIONS=507} [2023-11-17 12:14:58,406 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 186 predicate places. [2023-11-17 12:14:58,406 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 507 transitions, 8105 flow [2023-11-17 12:14:58,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 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 12:14:58,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:58,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:58,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:58,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 12:14:58,607 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:14:58,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1397000761, now seen corresponding path program 13 times [2023-11-17 12:14:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:58,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662453821] [2023-11-17 12:14:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:58,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:58,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662453821] [2023-11-17 12:14:58,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662453821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:58,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155521443] [2023-11-17 12:14:58,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:14:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:58,693 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:14:58,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:14:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:58,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:14:58,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:58,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:14:58,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155521443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:58,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:58,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:14:58,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083224998] [2023-11-17 12:14:58,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:58,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:14:58,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:14:58,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:14:58,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:14:58,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 507 transitions, 8105 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:58,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:58,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:14:58,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:59,929 INFO L124 PetriNetUnfolderBase]: 1744/3081 cut-off events. [2023-11-17 12:14:59,930 INFO L125 PetriNetUnfolderBase]: For 53202/53202 co-relation queries the response was YES. [2023-11-17 12:14:59,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25575 conditions, 3081 events. 1744/3081 cut-off events. For 53202/53202 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18993 event pairs, 160 based on Foata normal form. 42/3116 useless extension candidates. Maximal degree in co-relation 25371. Up to 1102 conditions per place. [2023-11-17 12:14:59,961 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 341 selfloop transitions, 288 changer transitions 4/633 dead transitions. [2023-11-17 12:14:59,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 633 transitions, 11562 flow [2023-11-17 12:14:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:14:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:14:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2023-11-17 12:14:59,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25919117647058826 [2023-11-17 12:14:59,963 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 141 transitions. [2023-11-17 12:14:59,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 141 transitions. [2023-11-17 12:14:59,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:59,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 141 transitions. [2023-11-17 12:14:59,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:59,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:59,966 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:59,966 INFO L175 Difference]: Start difference. First operand has 208 places, 507 transitions, 8105 flow. Second operand 17 states and 141 transitions. [2023-11-17 12:14:59,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 633 transitions, 11562 flow [2023-11-17 12:15:00,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 633 transitions, 10977 flow, removed 186 selfloop flow, removed 9 redundant places. [2023-11-17 12:15:00,287 INFO L231 Difference]: Finished difference. Result has 217 places, 583 transitions, 10011 flow [2023-11-17 12:15:00,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10011, PETRI_PLACES=217, PETRI_TRANSITIONS=583} [2023-11-17 12:15:00,288 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2023-11-17 12:15:00,288 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 583 transitions, 10011 flow [2023-11-17 12:15:00,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:00,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:00,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:00,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:15:00,492 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:00,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash 462092615, now seen corresponding path program 14 times [2023-11-17 12:15:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:00,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634419111] [2023-11-17 12:15:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:00,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634419111] [2023-11-17 12:15:00,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634419111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802077586] [2023-11-17 12:15:00,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:00,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:00,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:00,581 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:00,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:15:00,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:00,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:00,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:00,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802077586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:00,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:00,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:15:00,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769775864] [2023-11-17 12:15:00,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:00,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:00,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:00,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:00,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:00,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:00,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 583 transitions, 10011 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 12:15:00,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:00,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:00,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:01,582 INFO L124 PetriNetUnfolderBase]: 1868/3273 cut-off events. [2023-11-17 12:15:01,582 INFO L125 PetriNetUnfolderBase]: For 59691/59691 co-relation queries the response was YES. [2023-11-17 12:15:01,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28924 conditions, 3273 events. 1868/3273 cut-off events. For 59691/59691 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 20181 event pairs, 462 based on Foata normal form. 40/3306 useless extension candidates. Maximal degree in co-relation 28363. Up to 2744 conditions per place. [2023-11-17 12:15:01,610 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 532 selfloop transitions, 120 changer transitions 2/654 dead transitions. [2023-11-17 12:15:01,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 654 transitions, 12864 flow [2023-11-17 12:15:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:15:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:15:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 92 transitions. [2023-11-17 12:15:01,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26136363636363635 [2023-11-17 12:15:01,612 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 92 transitions. [2023-11-17 12:15:01,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 92 transitions. [2023-11-17 12:15:01,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:01,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 92 transitions. [2023-11-17 12:15:01,613 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 12:15:01,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:01,613 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:01,613 INFO L175 Difference]: Start difference. First operand has 217 places, 583 transitions, 10011 flow. Second operand 11 states and 92 transitions. [2023-11-17 12:15:01,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 654 transitions, 12864 flow [2023-11-17 12:15:02,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 654 transitions, 12199 flow, removed 280 selfloop flow, removed 4 redundant places. [2023-11-17 12:15:02,042 INFO L231 Difference]: Finished difference. Result has 227 places, 624 transitions, 10725 flow [2023-11-17 12:15:02,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=9346, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10725, PETRI_PLACES=227, PETRI_TRANSITIONS=624} [2023-11-17 12:15:02,043 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 205 predicate places. [2023-11-17 12:15:02,043 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 624 transitions, 10725 flow [2023-11-17 12:15:02,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 12:15:02,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:02,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:02,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:15:02,245 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:02,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash -466950143, now seen corresponding path program 15 times [2023-11-17 12:15:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:02,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219624908] [2023-11-17 12:15:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:02,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:02,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219624908] [2023-11-17 12:15:02,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219624908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:02,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894480052] [2023-11-17 12:15:02,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:02,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:02,346 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:02,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 12:15:02,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:15:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:02,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:02,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:02,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894480052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:02,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:02,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:15:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251367247] [2023-11-17 12:15:02,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:02,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:02,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:02,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:02,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:02,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 624 transitions, 10725 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 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 12:15:02,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:02,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:02,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:03,638 INFO L124 PetriNetUnfolderBase]: 1959/3426 cut-off events. [2023-11-17 12:15:03,638 INFO L125 PetriNetUnfolderBase]: For 66755/66755 co-relation queries the response was YES. [2023-11-17 12:15:03,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30859 conditions, 3426 events. 1959/3426 cut-off events. For 66755/66755 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21263 event pairs, 441 based on Foata normal form. 24/3443 useless extension candidates. Maximal degree in co-relation 30429. Up to 2691 conditions per place. [2023-11-17 12:15:03,666 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 511 selfloop transitions, 167 changer transitions 15/693 dead transitions. [2023-11-17 12:15:03,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 693 transitions, 13620 flow [2023-11-17 12:15:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 121 transitions. [2023-11-17 12:15:03,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.236328125 [2023-11-17 12:15:03,667 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 121 transitions. [2023-11-17 12:15:03,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 121 transitions. [2023-11-17 12:15:03,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:03,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 121 transitions. [2023-11-17 12:15:03,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.5625) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:03,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:03,669 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:03,669 INFO L175 Difference]: Start difference. First operand has 227 places, 624 transitions, 10725 flow. Second operand 16 states and 121 transitions. [2023-11-17 12:15:03,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 693 transitions, 13620 flow [2023-11-17 12:15:04,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 693 transitions, 12938 flow, removed 334 selfloop flow, removed 1 redundant places. [2023-11-17 12:15:04,016 INFO L231 Difference]: Finished difference. Result has 247 places, 646 transitions, 11267 flow [2023-11-17 12:15:04,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=11267, PETRI_PLACES=247, PETRI_TRANSITIONS=646} [2023-11-17 12:15:04,017 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 225 predicate places. [2023-11-17 12:15:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 646 transitions, 11267 flow [2023-11-17 12:15:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 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 12:15:04,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:04,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:04,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:04,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:04,218 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1345361848, now seen corresponding path program 16 times [2023-11-17 12:15:04,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:04,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191874539] [2023-11-17 12:15:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:04,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:04,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191874539] [2023-11-17 12:15:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191874539] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911800442] [2023-11-17 12:15:04,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:04,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:04,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:04,309 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:04,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 12:15:04,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:04,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:04,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:04,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:04,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911800442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:04,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:04,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:15:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202002060] [2023-11-17 12:15:04,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:04,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:04,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:04,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:04,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:04,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 646 transitions, 11267 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:04,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:04,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:05,655 INFO L124 PetriNetUnfolderBase]: 1995/3490 cut-off events. [2023-11-17 12:15:05,655 INFO L125 PetriNetUnfolderBase]: For 69424/69424 co-relation queries the response was YES. [2023-11-17 12:15:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31482 conditions, 3490 events. 1995/3490 cut-off events. For 69424/69424 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21766 event pairs, 188 based on Foata normal form. 16/3497 useless extension candidates. Maximal degree in co-relation 31339. Up to 1619 conditions per place. [2023-11-17 12:15:05,691 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 478 selfloop transitions, 257 changer transitions 1/736 dead transitions. [2023-11-17 12:15:05,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 736 transitions, 14391 flow [2023-11-17 12:15:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:15:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:15:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 167 transitions. [2023-11-17 12:15:05,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2269021739130435 [2023-11-17 12:15:05,692 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 167 transitions. [2023-11-17 12:15:05,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 167 transitions. [2023-11-17 12:15:05,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:05,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 167 transitions. [2023-11-17 12:15:05,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.260869565217392) internal successors, (167), 23 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:05,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 32.0) internal successors, (768), 24 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:05,694 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 32.0) internal successors, (768), 24 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:05,695 INFO L175 Difference]: Start difference. First operand has 247 places, 646 transitions, 11267 flow. Second operand 23 states and 167 transitions. [2023-11-17 12:15:05,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 736 transitions, 14391 flow [2023-11-17 12:15:06,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 736 transitions, 13765 flow, removed 254 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:06,175 INFO L231 Difference]: Finished difference. Result has 265 places, 691 transitions, 12227 flow [2023-11-17 12:15:06,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=10681, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12227, PETRI_PLACES=265, PETRI_TRANSITIONS=691} [2023-11-17 12:15:06,175 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 243 predicate places. [2023-11-17 12:15:06,175 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 691 transitions, 12227 flow [2023-11-17 12:15:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:06,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:06,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:06,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:06,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-17 12:15:06,377 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:06,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1477132984, now seen corresponding path program 17 times [2023-11-17 12:15:06,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:06,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550658727] [2023-11-17 12:15:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:06,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550658727] [2023-11-17 12:15:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550658727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127220581] [2023-11-17 12:15:06,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:06,453 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:06,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 12:15:06,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:06,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:06,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:06,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:06,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127220581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:06,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:15:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794779119] [2023-11-17 12:15:06,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:15:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:15:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:15:06,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:06,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 691 transitions, 12227 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 12:15:06,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:06,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:07,935 INFO L124 PetriNetUnfolderBase]: 2257/4022 cut-off events. [2023-11-17 12:15:07,935 INFO L125 PetriNetUnfolderBase]: For 91631/91631 co-relation queries the response was YES. [2023-11-17 12:15:07,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37592 conditions, 4022 events. 2257/4022 cut-off events. For 91631/91631 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26447 event pairs, 117 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 37081. Up to 1448 conditions per place. [2023-11-17 12:15:07,974 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 556 selfloop transitions, 279 changer transitions 5/840 dead transitions. [2023-11-17 12:15:07,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 840 transitions, 17071 flow [2023-11-17 12:15:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:15:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:15:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 92 transitions. [2023-11-17 12:15:07,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875 [2023-11-17 12:15:07,977 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 92 transitions. [2023-11-17 12:15:07,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 92 transitions. [2023-11-17 12:15:07,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:07,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 92 transitions. [2023-11-17 12:15:07,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.2) internal successors, (92), 10 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 12:15:07,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 32.0) internal successors, (352), 11 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:07,979 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 32.0) internal successors, (352), 11 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:07,979 INFO L175 Difference]: Start difference. First operand has 265 places, 691 transitions, 12227 flow. Second operand 10 states and 92 transitions. [2023-11-17 12:15:07,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 840 transitions, 17071 flow [2023-11-17 12:15:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 840 transitions, 16154 flow, removed 353 selfloop flow, removed 9 redundant places. [2023-11-17 12:15:08,669 INFO L231 Difference]: Finished difference. Result has 272 places, 773 transitions, 14423 flow [2023-11-17 12:15:08,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=11652, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14423, PETRI_PLACES=272, PETRI_TRANSITIONS=773} [2023-11-17 12:15:08,670 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 250 predicate places. [2023-11-17 12:15:08,670 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 773 transitions, 14423 flow [2023-11-17 12:15:08,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 12:15:08,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:08,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:08,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:08,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:08,875 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:08,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:08,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1687097945, now seen corresponding path program 18 times [2023-11-17 12:15:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:08,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036013730] [2023-11-17 12:15:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:08,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:08,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036013730] [2023-11-17 12:15:08,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036013730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:08,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243733657] [2023-11-17 12:15:08,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:08,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:08,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:08,965 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:08,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 12:15:09,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:15:09,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:09,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:09,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:09,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:09,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243733657] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:09,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:09,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:15:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30747072] [2023-11-17 12:15:09,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:09,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:09,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:09,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:09,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:09,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:09,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 773 transitions, 14423 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 12:15:09,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:09,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:09,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:10,371 INFO L124 PetriNetUnfolderBase]: 2253/4032 cut-off events. [2023-11-17 12:15:10,371 INFO L125 PetriNetUnfolderBase]: For 105946/105946 co-relation queries the response was YES. [2023-11-17 12:15:10,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39255 conditions, 4032 events. 2253/4032 cut-off events. For 105946/105946 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26680 event pairs, 535 based on Foata normal form. 10/4035 useless extension candidates. Maximal degree in co-relation 39002. Up to 3005 conditions per place. [2023-11-17 12:15:10,508 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 612 selfloop transitions, 196 changer transitions 5/813 dead transitions. [2023-11-17 12:15:10,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 813 transitions, 16964 flow [2023-11-17 12:15:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:15:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:15:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 91 transitions. [2023-11-17 12:15:10,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2585227272727273 [2023-11-17 12:15:10,513 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 91 transitions. [2023-11-17 12:15:10,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 91 transitions. [2023-11-17 12:15:10,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:10,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 91 transitions. [2023-11-17 12:15:10,514 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 12:15:10,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:10,515 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:10,515 INFO L175 Difference]: Start difference. First operand has 272 places, 773 transitions, 14423 flow. Second operand 11 states and 91 transitions. [2023-11-17 12:15:10,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 813 transitions, 16964 flow [2023-11-17 12:15:11,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 813 transitions, 16620 flow, removed 132 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:11,169 INFO L231 Difference]: Finished difference. Result has 282 places, 779 transitions, 14774 flow [2023-11-17 12:15:11,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=14079, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14774, PETRI_PLACES=282, PETRI_TRANSITIONS=779} [2023-11-17 12:15:11,170 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 260 predicate places. [2023-11-17 12:15:11,170 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 779 transitions, 14774 flow [2023-11-17 12:15:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 12:15:11,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:11,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:11,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:11,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:11,377 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:11,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1689919161, now seen corresponding path program 19 times [2023-11-17 12:15:11,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:11,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032530060] [2023-11-17 12:15:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:11,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:11,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:11,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032530060] [2023-11-17 12:15:11,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032530060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:11,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901191596] [2023-11-17 12:15:11,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:11,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:11,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:11,465 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:11,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 12:15:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:11,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:11,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:11,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901191596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:11,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:11,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:15:11,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016283677] [2023-11-17 12:15:11,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:11,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:15:11,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:15:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:15:11,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:11,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 779 transitions, 14774 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:11,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:11,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:11,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:12,868 INFO L124 PetriNetUnfolderBase]: 2230/3991 cut-off events. [2023-11-17 12:15:12,868 INFO L125 PetriNetUnfolderBase]: For 103313/103313 co-relation queries the response was YES. [2023-11-17 12:15:12,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38996 conditions, 3991 events. 2230/3991 cut-off events. For 103313/103313 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26374 event pairs, 492 based on Foata normal form. 4/3988 useless extension candidates. Maximal degree in co-relation 38746. Up to 2763 conditions per place. [2023-11-17 12:15:12,911 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 630 selfloop transitions, 166 changer transitions 6/802 dead transitions. [2023-11-17 12:15:12,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 802 transitions, 16764 flow [2023-11-17 12:15:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:15:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:15:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2023-11-17 12:15:12,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30357142857142855 [2023-11-17 12:15:12,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 68 transitions. [2023-11-17 12:15:12,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 68 transitions. [2023-11-17 12:15:12,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:12,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 68 transitions. [2023-11-17 12:15:12,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 12:15:12,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:12,913 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:12,913 INFO L175 Difference]: Start difference. First operand has 282 places, 779 transitions, 14774 flow. Second operand 7 states and 68 transitions. [2023-11-17 12:15:12,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 802 transitions, 16764 flow [2023-11-17 12:15:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 802 transitions, 16141 flow, removed 110 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:13,797 INFO L231 Difference]: Finished difference. Result has 282 places, 776 transitions, 14446 flow [2023-11-17 12:15:13,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=14163, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14446, PETRI_PLACES=282, PETRI_TRANSITIONS=776} [2023-11-17 12:15:13,798 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 260 predicate places. [2023-11-17 12:15:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 776 transitions, 14446 flow [2023-11-17 12:15:13,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:13,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:13,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-17 12:15:13,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:13,999 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:13,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash 808686240, now seen corresponding path program 20 times [2023-11-17 12:15:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:14,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708027258] [2023-11-17 12:15:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:14,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:14,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708027258] [2023-11-17 12:15:14,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708027258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766306158] [2023-11-17 12:15:14,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:14,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:14,089 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:14,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 12:15:14,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:14,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:14,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:14,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:14,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766306158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:14,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:14,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:15:14,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179681146] [2023-11-17 12:15:14,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:14,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:14,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:14,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:14,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:14,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 776 transitions, 14446 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:14,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:14,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:14,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:15,776 INFO L124 PetriNetUnfolderBase]: 2347/4202 cut-off events. [2023-11-17 12:15:15,776 INFO L125 PetriNetUnfolderBase]: For 103580/103580 co-relation queries the response was YES. [2023-11-17 12:15:15,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40482 conditions, 4202 events. 2347/4202 cut-off events. For 103580/103580 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27982 event pairs, 246 based on Foata normal form. 4/4199 useless extension candidates. Maximal degree in co-relation 39998. Up to 1997 conditions per place. [2023-11-17 12:15:15,822 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 603 selfloop transitions, 274 changer transitions 0/877 dead transitions. [2023-11-17 12:15:15,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 877 transitions, 17963 flow [2023-11-17 12:15:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:15:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:15:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 107 transitions. [2023-11-17 12:15:15,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23883928571428573 [2023-11-17 12:15:15,823 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 107 transitions. [2023-11-17 12:15:15,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 107 transitions. [2023-11-17 12:15:15,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:15,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 107 transitions. [2023-11-17 12:15:15,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:15,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:15,825 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:15,825 INFO L175 Difference]: Start difference. First operand has 282 places, 776 transitions, 14446 flow. Second operand 14 states and 107 transitions. [2023-11-17 12:15:15,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 877 transitions, 17963 flow [2023-11-17 12:15:16,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 877 transitions, 17568 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-17 12:15:16,692 INFO L231 Difference]: Finished difference. Result has 295 places, 839 transitions, 15984 flow [2023-11-17 12:15:16,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=14061, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15984, PETRI_PLACES=295, PETRI_TRANSITIONS=839} [2023-11-17 12:15:16,692 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 273 predicate places. [2023-11-17 12:15:16,693 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 839 transitions, 15984 flow [2023-11-17 12:15:16,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:16,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:16,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:16,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:16,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:16,893 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:16,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2040124233, now seen corresponding path program 21 times [2023-11-17 12:15:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:16,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483026989] [2023-11-17 12:15:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483026989] [2023-11-17 12:15:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483026989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057424587] [2023-11-17 12:15:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:16,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:16,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:16,977 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:16,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 12:15:17,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:15:17,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:17,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:17,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:17,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:15:17,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057424587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:17,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:17,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:15:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706192174] [2023-11-17 12:15:17,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:17,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:17,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:17,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:17,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 839 transitions, 15984 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:15:17,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:17,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:17,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:18,754 INFO L124 PetriNetUnfolderBase]: 2296/4119 cut-off events. [2023-11-17 12:15:18,754 INFO L125 PetriNetUnfolderBase]: For 108000/108000 co-relation queries the response was YES. [2023-11-17 12:15:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40535 conditions, 4119 events. 2296/4119 cut-off events. For 108000/108000 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 27492 event pairs, 674 based on Foata normal form. 86/4198 useless extension candidates. Maximal degree in co-relation 40198. Up to 3580 conditions per place. [2023-11-17 12:15:18,794 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 752 selfloop transitions, 128 changer transitions 2/882 dead transitions. [2023-11-17 12:15:18,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 882 transitions, 18443 flow [2023-11-17 12:15:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:15:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:15:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 125 transitions. [2023-11-17 12:15:18,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2604166666666667 [2023-11-17 12:15:18,796 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 125 transitions. [2023-11-17 12:15:18,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 125 transitions. [2023-11-17 12:15:18,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:18,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 125 transitions. [2023-11-17 12:15:18,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:18,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:18,797 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:18,797 INFO L175 Difference]: Start difference. First operand has 295 places, 839 transitions, 15984 flow. Second operand 15 states and 125 transitions. [2023-11-17 12:15:18,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 882 transitions, 18443 flow [2023-11-17 12:15:19,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 882 transitions, 18000 flow, removed 101 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:19,606 INFO L231 Difference]: Finished difference. Result has 306 places, 842 transitions, 15916 flow [2023-11-17 12:15:19,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=15479, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15916, PETRI_PLACES=306, PETRI_TRANSITIONS=842} [2023-11-17 12:15:19,607 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 284 predicate places. [2023-11-17 12:15:19,607 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 842 transitions, 15916 flow [2023-11-17 12:15:19,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:15:19,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:19,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:19,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 12:15:19,811 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:19,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1510140565, now seen corresponding path program 22 times [2023-11-17 12:15:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334474942] [2023-11-17 12:15:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:19,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:19,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334474942] [2023-11-17 12:15:19,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334474942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:19,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537380370] [2023-11-17 12:15:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:19,893 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:19,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 12:15:20,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:20,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:20,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:20,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:20,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:20,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537380370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:20,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:20,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:15:20,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927876316] [2023-11-17 12:15:20,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:20,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:20,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:20,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:20,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:20,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 842 transitions, 15916 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:15:20,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:20,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:20,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:21,742 INFO L124 PetriNetUnfolderBase]: 2380/4257 cut-off events. [2023-11-17 12:15:21,743 INFO L125 PetriNetUnfolderBase]: For 113156/113156 co-relation queries the response was YES. [2023-11-17 12:15:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42169 conditions, 4257 events. 2380/4257 cut-off events. For 113156/113156 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 28481 event pairs, 649 based on Foata normal form. 42/4292 useless extension candidates. Maximal degree in co-relation 42025. Up to 3503 conditions per place. [2023-11-17 12:15:21,786 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 711 selfloop transitions, 203 changer transitions 0/914 dead transitions. [2023-11-17 12:15:21,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 914 transitions, 19405 flow [2023-11-17 12:15:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2023-11-17 12:15:21,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25390625 [2023-11-17 12:15:21,788 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 130 transitions. [2023-11-17 12:15:21,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 130 transitions. [2023-11-17 12:15:21,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:21,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 130 transitions. [2023-11-17 12:15:21,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.125) internal successors, (130), 16 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:21,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:21,789 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:21,789 INFO L175 Difference]: Start difference. First operand has 306 places, 842 transitions, 15916 flow. Second operand 16 states and 130 transitions. [2023-11-17 12:15:21,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 914 transitions, 19405 flow [2023-11-17 12:15:22,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 914 transitions, 18923 flow, removed 106 selfloop flow, removed 10 redundant places. [2023-11-17 12:15:22,641 INFO L231 Difference]: Finished difference. Result has 313 places, 877 transitions, 17149 flow [2023-11-17 12:15:22,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=15443, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=17149, PETRI_PLACES=313, PETRI_TRANSITIONS=877} [2023-11-17 12:15:22,642 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 291 predicate places. [2023-11-17 12:15:22,642 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 877 transitions, 17149 flow [2023-11-17 12:15:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:15:22,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:22,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:22,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:22,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 12:15:22,843 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:22,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 643907523, now seen corresponding path program 23 times [2023-11-17 12:15:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:22,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455251939] [2023-11-17 12:15:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:22,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455251939] [2023-11-17 12:15:22,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455251939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438899971] [2023-11-17 12:15:22,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:22,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:22,921 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:22,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 12:15:23,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:23,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:23,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:23,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:23,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:23,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438899971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:23,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:23,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:23,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667664564] [2023-11-17 12:15:23,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:23,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:23,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:23,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:23,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 877 transitions, 17149 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:23,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:23,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:23,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:24,784 INFO L124 PetriNetUnfolderBase]: 2442/4355 cut-off events. [2023-11-17 12:15:24,784 INFO L125 PetriNetUnfolderBase]: For 122922/122922 co-relation queries the response was YES. [2023-11-17 12:15:24,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44040 conditions, 4355 events. 2442/4355 cut-off events. For 122922/122922 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29199 event pairs, 537 based on Foata normal form. 36/4384 useless extension candidates. Maximal degree in co-relation 43494. Up to 3049 conditions per place. [2023-11-17 12:15:24,831 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 624 selfloop transitions, 323 changer transitions 2/949 dead transitions. [2023-11-17 12:15:24,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 949 transitions, 20737 flow [2023-11-17 12:15:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:15:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:15:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 142 transitions. [2023-11-17 12:15:24,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2610294117647059 [2023-11-17 12:15:24,833 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 142 transitions. [2023-11-17 12:15:24,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 142 transitions. [2023-11-17 12:15:24,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:24,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 142 transitions. [2023-11-17 12:15:24,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.352941176470589) internal successors, (142), 17 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:24,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:24,835 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:24,835 INFO L175 Difference]: Start difference. First operand has 313 places, 877 transitions, 17149 flow. Second operand 17 states and 142 transitions. [2023-11-17 12:15:24,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 949 transitions, 20737 flow [2023-11-17 12:15:25,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 949 transitions, 20068 flow, removed 282 selfloop flow, removed 7 redundant places. [2023-11-17 12:15:25,675 INFO L231 Difference]: Finished difference. Result has 325 places, 903 transitions, 18290 flow [2023-11-17 12:15:25,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=16432, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18290, PETRI_PLACES=325, PETRI_TRANSITIONS=903} [2023-11-17 12:15:25,676 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 303 predicate places. [2023-11-17 12:15:25,676 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 903 transitions, 18290 flow [2023-11-17 12:15:25,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:25,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:25,676 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:25,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:25,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 12:15:25,877 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:25,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:25,877 INFO L85 PathProgramCache]: Analyzing trace with hash -934124095, now seen corresponding path program 24 times [2023-11-17 12:15:25,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:25,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667542054] [2023-11-17 12:15:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667542054] [2023-11-17 12:15:25,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667542054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:25,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248774125] [2023-11-17 12:15:25,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:25,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:25,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:25,957 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:25,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 12:15:26,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:15:26,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:26,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:26,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:26,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:15:26,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248774125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:26,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:26,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173448057] [2023-11-17 12:15:26,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:26,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:26,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 903 transitions, 18290 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:15:26,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:26,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:26,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:27,603 INFO L124 PetriNetUnfolderBase]: 2429/4323 cut-off events. [2023-11-17 12:15:27,603 INFO L125 PetriNetUnfolderBase]: For 121982/121982 co-relation queries the response was YES. [2023-11-17 12:15:27,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44622 conditions, 4323 events. 2429/4323 cut-off events. For 121982/121982 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28795 event pairs, 534 based on Foata normal form. 14/4330 useless extension candidates. Maximal degree in co-relation 44084. Up to 3027 conditions per place. [2023-11-17 12:15:27,653 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 638 selfloop transitions, 292 changer transitions 3/933 dead transitions. [2023-11-17 12:15:27,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 933 transitions, 20914 flow [2023-11-17 12:15:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:15:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:15:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2023-11-17 12:15:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2604166666666667 [2023-11-17 12:15:27,654 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 100 transitions. [2023-11-17 12:15:27,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 100 transitions. [2023-11-17 12:15:27,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:27,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 100 transitions. [2023-11-17 12:15:27,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:27,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:27,655 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:27,656 INFO L175 Difference]: Start difference. First operand has 325 places, 903 transitions, 18290 flow. Second operand 12 states and 100 transitions. [2023-11-17 12:15:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 933 transitions, 20914 flow [2023-11-17 12:15:28,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 933 transitions, 19992 flow, removed 290 selfloop flow, removed 12 redundant places. [2023-11-17 12:15:28,642 INFO L231 Difference]: Finished difference. Result has 324 places, 900 transitions, 17966 flow [2023-11-17 12:15:28,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=17345, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17966, PETRI_PLACES=324, PETRI_TRANSITIONS=900} [2023-11-17 12:15:28,643 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 302 predicate places. [2023-11-17 12:15:28,643 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 900 transitions, 17966 flow [2023-11-17 12:15:28,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:15:28,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:28,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:28,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 12:15:28,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:15:28,845 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:28,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2001619209, now seen corresponding path program 25 times [2023-11-17 12:15:28,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:28,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069774619] [2023-11-17 12:15:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:28,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069774619] [2023-11-17 12:15:28,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069774619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359083130] [2023-11-17 12:15:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:28,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:28,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:28,925 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:28,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 12:15:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:29,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:29,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:29,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359083130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:15:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835405259] [2023-11-17 12:15:29,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:29,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:29,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:29,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:29,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 900 transitions, 17966 flow. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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 12:15:29,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:29,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:29,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:30,629 INFO L124 PetriNetUnfolderBase]: 2658/4638 cut-off events. [2023-11-17 12:15:30,629 INFO L125 PetriNetUnfolderBase]: For 135528/135528 co-relation queries the response was YES. [2023-11-17 12:15:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48325 conditions, 4638 events. 2658/4638 cut-off events. For 135528/135528 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 30796 event pairs, 680 based on Foata normal form. 30/4661 useless extension candidates. Maximal degree in co-relation 47809. Up to 3867 conditions per place. [2023-11-17 12:15:30,683 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 781 selfloop transitions, 240 changer transitions 1/1022 dead transitions. [2023-11-17 12:15:30,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1022 transitions, 22747 flow [2023-11-17 12:15:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:15:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:15:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 117 transitions. [2023-11-17 12:15:30,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24375 [2023-11-17 12:15:30,685 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 117 transitions. [2023-11-17 12:15:30,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 117 transitions. [2023-11-17 12:15:30,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:30,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 117 transitions. [2023-11-17 12:15:30,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,686 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,686 INFO L175 Difference]: Start difference. First operand has 324 places, 900 transitions, 17966 flow. Second operand 15 states and 117 transitions. [2023-11-17 12:15:30,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1022 transitions, 22747 flow [2023-11-17 12:15:31,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1022 transitions, 21942 flow, removed 57 selfloop flow, removed 11 redundant places. [2023-11-17 12:15:31,739 INFO L231 Difference]: Finished difference. Result has 330 places, 989 transitions, 20205 flow [2023-11-17 12:15:31,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=17226, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=20205, PETRI_PLACES=330, PETRI_TRANSITIONS=989} [2023-11-17 12:15:31,740 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 308 predicate places. [2023-11-17 12:15:31,740 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 989 transitions, 20205 flow [2023-11-17 12:15:31,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 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 12:15:31,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:31,740 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:31,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 12:15:31,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:15:31,941 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:31,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash -343473172, now seen corresponding path program 26 times [2023-11-17 12:15:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:31,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136184242] [2023-11-17 12:15:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:32,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:32,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136184242] [2023-11-17 12:15:32,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136184242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:32,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926441267] [2023-11-17 12:15:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:32,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:32,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:32,046 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:32,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:15:32,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:32,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:32,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:32,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:32,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926441267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:32,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:32,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:15:32,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146503728] [2023-11-17 12:15:32,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:32,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:15:32,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:32,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:15:32,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:15:32,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:32,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 989 transitions, 20205 flow. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 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 12:15:32,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:32,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:33,979 INFO L124 PetriNetUnfolderBase]: 2810/4920 cut-off events. [2023-11-17 12:15:33,979 INFO L125 PetriNetUnfolderBase]: For 139764/139764 co-relation queries the response was YES. [2023-11-17 12:15:34,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51435 conditions, 4920 events. 2810/4920 cut-off events. For 139764/139764 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 33140 event pairs, 119 based on Foata normal form. 18/4935 useless extension candidates. Maximal degree in co-relation 50890. Up to 1885 conditions per place. [2023-11-17 12:15:34,034 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 728 selfloop transitions, 373 changer transitions 5/1106 dead transitions. [2023-11-17 12:15:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1106 transitions, 24714 flow [2023-11-17 12:15:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:15:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:15:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2023-11-17 12:15:34,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30625 [2023-11-17 12:15:34,035 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 98 transitions. [2023-11-17 12:15:34,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 98 transitions. [2023-11-17 12:15:34,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:34,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 98 transitions. [2023-11-17 12:15:34,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 32.0) internal successors, (352), 11 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,035 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 32.0) internal successors, (352), 11 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,036 INFO L175 Difference]: Start difference. First operand has 330 places, 989 transitions, 20205 flow. Second operand 10 states and 98 transitions. [2023-11-17 12:15:34,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1106 transitions, 24714 flow [2023-11-17 12:15:35,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1106 transitions, 24045 flow, removed 308 selfloop flow, removed 5 redundant places. [2023-11-17 12:15:35,277 INFO L231 Difference]: Finished difference. Result has 341 places, 1035 transitions, 22085 flow [2023-11-17 12:15:35,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=19536, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22085, PETRI_PLACES=341, PETRI_TRANSITIONS=1035} [2023-11-17 12:15:35,278 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 319 predicate places. [2023-11-17 12:15:35,278 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1035 transitions, 22085 flow [2023-11-17 12:15:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 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 12:15:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:35,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:35,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-17 12:15:35,479 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:35,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 636241733, now seen corresponding path program 27 times [2023-11-17 12:15:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:35,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096797096] [2023-11-17 12:15:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:35,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:35,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096797096] [2023-11-17 12:15:35,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096797096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832922592] [2023-11-17 12:15:35,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:35,557 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:35,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:15:35,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:15:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:35,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:35,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:35,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832922592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:36,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:36,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344818636] [2023-11-17 12:15:36,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:36,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:36,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:36,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:36,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:36,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1035 transitions, 22085 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:36,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:36,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:36,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:37,746 INFO L124 PetriNetUnfolderBase]: 2872/5010 cut-off events. [2023-11-17 12:15:37,746 INFO L125 PetriNetUnfolderBase]: For 165932/165932 co-relation queries the response was YES. [2023-11-17 12:15:37,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54761 conditions, 5010 events. 2872/5010 cut-off events. For 165932/165932 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 33826 event pairs, 520 based on Foata normal form. 24/5031 useless extension candidates. Maximal degree in co-relation 54208. Up to 3428 conditions per place. [2023-11-17 12:15:37,807 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 655 selfloop transitions, 460 changer transitions 2/1117 dead transitions. [2023-11-17 12:15:37,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1117 transitions, 26475 flow [2023-11-17 12:15:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 128 transitions. [2023-11-17 12:15:37,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25 [2023-11-17 12:15:37,808 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 128 transitions. [2023-11-17 12:15:37,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 128 transitions. [2023-11-17 12:15:37,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:37,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 128 transitions. [2023-11-17 12:15:37,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,810 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,810 INFO L175 Difference]: Start difference. First operand has 341 places, 1035 transitions, 22085 flow. Second operand 16 states and 128 transitions. [2023-11-17 12:15:37,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1117 transitions, 26475 flow [2023-11-17 12:15:39,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1117 transitions, 26192 flow, removed 81 selfloop flow, removed 4 redundant places. [2023-11-17 12:15:39,205 INFO L231 Difference]: Finished difference. Result has 354 places, 1066 transitions, 24263 flow [2023-11-17 12:15:39,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=21852, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24263, PETRI_PLACES=354, PETRI_TRANSITIONS=1066} [2023-11-17 12:15:39,206 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 332 predicate places. [2023-11-17 12:15:39,206 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1066 transitions, 24263 flow [2023-11-17 12:15:39,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:39,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:39,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-17 12:15:39,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:39,408 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:39,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash 194186817, now seen corresponding path program 28 times [2023-11-17 12:15:39,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:39,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695685827] [2023-11-17 12:15:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:39,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:39,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695685827] [2023-11-17 12:15:39,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695685827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:39,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341446231] [2023-11-17 12:15:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:39,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:39,489 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:39,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:15:39,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:39,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:39,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:39,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:39,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:39,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341446231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:39,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:39,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:15:39,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686661060] [2023-11-17 12:15:39,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:39,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:15:39,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:39,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:15:39,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:15:39,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:39,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1066 transitions, 24263 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 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 12:15:39,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:39,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:41,613 INFO L124 PetriNetUnfolderBase]: 2876/5038 cut-off events. [2023-11-17 12:15:41,613 INFO L125 PetriNetUnfolderBase]: For 169242/169242 co-relation queries the response was YES. [2023-11-17 12:15:41,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56534 conditions, 5038 events. 2876/5038 cut-off events. For 169242/169242 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34241 event pairs, 562 based on Foata normal form. 12/5047 useless extension candidates. Maximal degree in co-relation 56148. Up to 3495 conditions per place. [2023-11-17 12:15:41,671 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 826 selfloop transitions, 273 changer transitions 16/1115 dead transitions. [2023-11-17 12:15:41,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1115 transitions, 27321 flow [2023-11-17 12:15:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:15:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:15:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-17 12:15:41,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33035714285714285 [2023-11-17 12:15:41,672 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-17 12:15:41,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-17 12:15:41,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:41,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-17 12:15:41,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 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 12:15:41,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,673 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,673 INFO L175 Difference]: Start difference. First operand has 354 places, 1066 transitions, 24263 flow. Second operand 7 states and 74 transitions. [2023-11-17 12:15:41,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1115 transitions, 27321 flow [2023-11-17 12:15:43,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1115 transitions, 26053 flow, removed 305 selfloop flow, removed 9 redundant places. [2023-11-17 12:15:43,148 INFO L231 Difference]: Finished difference. Result has 353 places, 1065 transitions, 23533 flow [2023-11-17 12:15:43,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=22995, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=793, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23533, PETRI_PLACES=353, PETRI_TRANSITIONS=1065} [2023-11-17 12:15:43,148 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 331 predicate places. [2023-11-17 12:15:43,149 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1065 transitions, 23533 flow [2023-11-17 12:15:43,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 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 12:15:43,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:43,149 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:43,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 12:15:43,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:43,350 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:43,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash -385991702, now seen corresponding path program 29 times [2023-11-17 12:15:43,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:43,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056939288] [2023-11-17 12:15:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:43,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:43,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:43,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056939288] [2023-11-17 12:15:43,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056939288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:43,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439240534] [2023-11-17 12:15:43,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:43,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:43,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:43,437 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:15:43,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:43,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:43,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:43,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439240534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:43,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:43,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:15:43,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410992803] [2023-11-17 12:15:43,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:43,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:43,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:43,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1065 transitions, 23533 flow. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:43,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:43,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:43,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:45,933 INFO L124 PetriNetUnfolderBase]: 3102/5464 cut-off events. [2023-11-17 12:15:45,933 INFO L125 PetriNetUnfolderBase]: For 177487/177487 co-relation queries the response was YES. [2023-11-17 12:15:45,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60627 conditions, 5464 events. 3102/5464 cut-off events. For 177487/177487 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 37947 event pairs, 227 based on Foata normal form. 26/5487 useless extension candidates. Maximal degree in co-relation 60147. Up to 2694 conditions per place. [2023-11-17 12:15:46,000 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 864 selfloop transitions, 346 changer transitions 3/1213 dead transitions. [2023-11-17 12:15:46,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1213 transitions, 29120 flow [2023-11-17 12:15:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:15:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:15:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 180 transitions. [2023-11-17 12:15:46,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24456521739130435 [2023-11-17 12:15:46,002 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 180 transitions. [2023-11-17 12:15:46,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 180 transitions. [2023-11-17 12:15:46,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:46,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 180 transitions. [2023-11-17 12:15:46,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.826086956521739) internal successors, (180), 23 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:46,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 32.0) internal successors, (768), 24 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:46,003 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 32.0) internal successors, (768), 24 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:46,003 INFO L175 Difference]: Start difference. First operand has 353 places, 1065 transitions, 23533 flow. Second operand 23 states and 180 transitions. [2023-11-17 12:15:46,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1213 transitions, 29120 flow [2023-11-17 12:15:47,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1213 transitions, 28483 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:47,419 INFO L231 Difference]: Finished difference. Result has 375 places, 1157 transitions, 26242 flow [2023-11-17 12:15:47,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=22914, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26242, PETRI_PLACES=375, PETRI_TRANSITIONS=1157} [2023-11-17 12:15:47,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 353 predicate places. [2023-11-17 12:15:47,420 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1157 transitions, 26242 flow [2023-11-17 12:15:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:47,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:47,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-17 12:15:47,622 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:47,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash 681657925, now seen corresponding path program 30 times [2023-11-17 12:15:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:47,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78790142] [2023-11-17 12:15:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:47,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78790142] [2023-11-17 12:15:47,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78790142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:47,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097785271] [2023-11-17 12:15:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:47,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:47,704 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:47,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:15:47,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:15:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:47,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:47,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:47,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097785271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:47,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:47,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:15:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59945454] [2023-11-17 12:15:47,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:47,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:47,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:47,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:47,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:47,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1157 transitions, 26242 flow. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:47,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:47,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:50,269 INFO L124 PetriNetUnfolderBase]: 3205/5641 cut-off events. [2023-11-17 12:15:50,269 INFO L125 PetriNetUnfolderBase]: For 199697/199697 co-relation queries the response was YES. [2023-11-17 12:15:50,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64747 conditions, 5641 events. 3205/5641 cut-off events. For 199697/199697 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 39397 event pairs, 841 based on Foata normal form. 36/5674 useless extension candidates. Maximal degree in co-relation 64228. Up to 4802 conditions per place. [2023-11-17 12:15:50,338 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 1006 selfloop transitions, 201 changer transitions 22/1229 dead transitions. [2023-11-17 12:15:50,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1229 transitions, 30101 flow [2023-11-17 12:15:50,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:15:50,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:15:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 125 transitions. [2023-11-17 12:15:50,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2604166666666667 [2023-11-17 12:15:50,339 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 125 transitions. [2023-11-17 12:15:50,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 125 transitions. [2023-11-17 12:15:50,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:50,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 125 transitions. [2023-11-17 12:15:50,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.333333333333334) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,340 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,340 INFO L175 Difference]: Start difference. First operand has 375 places, 1157 transitions, 26242 flow. Second operand 15 states and 125 transitions. [2023-11-17 12:15:50,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1229 transitions, 30101 flow [2023-11-17 12:15:51,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1229 transitions, 29354 flow, removed 278 selfloop flow, removed 8 redundant places. [2023-11-17 12:15:51,912 INFO L231 Difference]: Finished difference. Result has 387 places, 1170 transitions, 26496 flow [2023-11-17 12:15:51,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=25495, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=26496, PETRI_PLACES=387, PETRI_TRANSITIONS=1170} [2023-11-17 12:15:51,913 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 365 predicate places. [2023-11-17 12:15:51,913 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1170 transitions, 26496 flow [2023-11-17 12:15:51,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:51,913 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:51,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 12:15:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:52,114 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:52,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 386546410, now seen corresponding path program 31 times [2023-11-17 12:15:52,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:52,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385440900] [2023-11-17 12:15:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:52,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:52,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385440900] [2023-11-17 12:15:52,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385440900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:52,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838812803] [2023-11-17 12:15:52,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:52,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:52,251 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:52,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:15:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:52,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:52,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:52,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:52,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838812803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:52,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:52,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:15:52,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602795148] [2023-11-17 12:15:52,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:52,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:52,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1170 transitions, 26496 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:15:52,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:52,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:52,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:54,897 INFO L124 PetriNetUnfolderBase]: 3282/5780 cut-off events. [2023-11-17 12:15:54,897 INFO L125 PetriNetUnfolderBase]: For 202276/202276 co-relation queries the response was YES. [2023-11-17 12:15:54,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65752 conditions, 5780 events. 3282/5780 cut-off events. For 202276/202276 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 40509 event pairs, 261 based on Foata normal form. 8/5785 useless extension candidates. Maximal degree in co-relation 65226. Up to 2997 conditions per place. [2023-11-17 12:15:54,970 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 967 selfloop transitions, 298 changer transitions 3/1268 dead transitions. [2023-11-17 12:15:54,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1268 transitions, 30914 flow [2023-11-17 12:15:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:15:54,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:15:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2023-11-17 12:15:54,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25669642857142855 [2023-11-17 12:15:54,971 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 115 transitions. [2023-11-17 12:15:54,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 115 transitions. [2023-11-17 12:15:54,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:54,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 115 transitions. [2023-11-17 12:15:54,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,972 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,973 INFO L175 Difference]: Start difference. First operand has 387 places, 1170 transitions, 26496 flow. Second operand 14 states and 115 transitions. [2023-11-17 12:15:54,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1268 transitions, 30914 flow [2023-11-17 12:15:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1268 transitions, 30580 flow, removed 101 selfloop flow, removed 8 redundant places. [2023-11-17 12:15:56,466 INFO L231 Difference]: Finished difference. Result has 396 places, 1222 transitions, 28095 flow [2023-11-17 12:15:56,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=26176, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28095, PETRI_PLACES=396, PETRI_TRANSITIONS=1222} [2023-11-17 12:15:56,467 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 374 predicate places. [2023-11-17 12:15:56,467 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1222 transitions, 28095 flow [2023-11-17 12:15:56,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 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 12:15:56,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:56,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:56,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:56,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 12:15:56,668 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:56,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1550174657, now seen corresponding path program 32 times [2023-11-17 12:15:56,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:56,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712384996] [2023-11-17 12:15:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:56,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:56,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:56,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712384996] [2023-11-17 12:15:56,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712384996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:56,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324711285] [2023-11-17 12:15:56,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:56,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:56,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:56,758 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:15:56,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:15:56,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:56,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:56,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:57,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:15:57,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324711285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:57,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:57,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:15:57,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382428915] [2023-11-17 12:15:57,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:57,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:57,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:57,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:57,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:57,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:15:57,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1222 transitions, 28095 flow. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:57,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:15:57,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:59,400 INFO L124 PetriNetUnfolderBase]: 3274/5776 cut-off events. [2023-11-17 12:15:59,400 INFO L125 PetriNetUnfolderBase]: For 210073/210073 co-relation queries the response was YES. [2023-11-17 12:15:59,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66494 conditions, 5776 events. 3274/5776 cut-off events. For 210073/210073 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40455 event pairs, 712 based on Foata normal form. 20/5793 useless extension candidates. Maximal degree in co-relation 65952. Up to 4480 conditions per place. [2023-11-17 12:15:59,475 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 967 selfloop transitions, 296 changer transitions 9/1272 dead transitions. [2023-11-17 12:15:59,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1272 transitions, 31477 flow [2023-11-17 12:15:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:15:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:15:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2023-11-17 12:15:59,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2023-11-17 12:15:59,476 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 96 transitions. [2023-11-17 12:15:59,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 96 transitions. [2023-11-17 12:15:59,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:59,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 96 transitions. [2023-11-17 12:15:59,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,477 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:59,477 INFO L175 Difference]: Start difference. First operand has 396 places, 1222 transitions, 28095 flow. Second operand 11 states and 96 transitions. [2023-11-17 12:15:59,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1272 transitions, 31477 flow [2023-11-17 12:16:00,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1272 transitions, 31130 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-11-17 12:16:00,999 INFO L231 Difference]: Finished difference. Result has 401 places, 1220 transitions, 28312 flow [2023-11-17 12:16:01,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=27748, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=28312, PETRI_PLACES=401, PETRI_TRANSITIONS=1220} [2023-11-17 12:16:01,000 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 379 predicate places. [2023-11-17 12:16:01,000 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1220 transitions, 28312 flow [2023-11-17 12:16:01,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:01,001 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:01,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 12:16:01,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:01,206 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:01,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1873781505, now seen corresponding path program 33 times [2023-11-17 12:16:01,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:01,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752278905] [2023-11-17 12:16:01,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:01,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:01,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:01,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752278905] [2023-11-17 12:16:01,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752278905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:01,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745495099] [2023-11-17 12:16:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:16:01,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:01,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:01,281 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:01,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:16:01,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:16:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:01,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:16:01,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:01,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745495099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:01,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:16:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47394383] [2023-11-17 12:16:01,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:16:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:16:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:16:01,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:16:01,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1220 transitions, 28312 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:16:01,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:01,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:16:01,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:04,205 INFO L124 PetriNetUnfolderBase]: 3269/5767 cut-off events. [2023-11-17 12:16:04,205 INFO L125 PetriNetUnfolderBase]: For 220742/220742 co-relation queries the response was YES. [2023-11-17 12:16:04,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66552 conditions, 5767 events. 3269/5767 cut-off events. For 220742/220742 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 40444 event pairs, 628 based on Foata normal form. 36/5800 useless extension candidates. Maximal degree in co-relation 66018. Up to 4085 conditions per place. [2023-11-17 12:16:04,295 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 826 selfloop transitions, 436 changer transitions 7/1269 dead transitions. [2023-11-17 12:16:04,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1269 transitions, 31752 flow [2023-11-17 12:16:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:16:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:16:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 104 transitions. [2023-11-17 12:16:04,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2708333333333333 [2023-11-17 12:16:04,296 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 104 transitions. [2023-11-17 12:16:04,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 104 transitions. [2023-11-17 12:16:04,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:04,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 104 transitions. [2023-11-17 12:16:04,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.666666666666666) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:04,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:04,297 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:04,297 INFO L175 Difference]: Start difference. First operand has 401 places, 1220 transitions, 28312 flow. Second operand 12 states and 104 transitions. [2023-11-17 12:16:04,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1269 transitions, 31752 flow [2023-11-17 12:16:05,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1269 transitions, 31149 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 12:16:06,021 INFO L231 Difference]: Finished difference. Result has 403 places, 1217 transitions, 28541 flow [2023-11-17 12:16:06,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=27625, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=28541, PETRI_PLACES=403, PETRI_TRANSITIONS=1217} [2023-11-17 12:16:06,022 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 381 predicate places. [2023-11-17 12:16:06,022 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1217 transitions, 28541 flow [2023-11-17 12:16:06,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 12:16:06,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:06,023 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:06,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:06,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 12:16:06,228 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:06,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1355099337, now seen corresponding path program 34 times [2023-11-17 12:16:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:06,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328882918] [2023-11-17 12:16:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328882918] [2023-11-17 12:16:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328882918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269535787] [2023-11-17 12:16:06,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:16:06,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:06,302 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:06,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 12:16:06,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:16:06,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:06,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:16:06,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:06,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269535787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:06,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:06,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:16:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591746007] [2023-11-17 12:16:06,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:06,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:16:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:16:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:16:06,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:16:06,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1217 transitions, 28541 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:16:06,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:06,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:16:06,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:09,011 INFO L124 PetriNetUnfolderBase]: 3409/5946 cut-off events. [2023-11-17 12:16:09,011 INFO L125 PetriNetUnfolderBase]: For 227209/227209 co-relation queries the response was YES. [2023-11-17 12:16:09,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69967 conditions, 5946 events. 3409/5946 cut-off events. For 227209/227209 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 41049 event pairs, 214 based on Foata normal form. 30/5973 useless extension candidates. Maximal degree in co-relation 69432. Up to 3107 conditions per place. [2023-11-17 12:16:09,095 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 803 selfloop transitions, 529 changer transitions 2/1334 dead transitions. [2023-11-17 12:16:09,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1334 transitions, 34317 flow [2023-11-17 12:16:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:16:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:16:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2023-11-17 12:16:09,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25183823529411764 [2023-11-17 12:16:09,096 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 137 transitions. [2023-11-17 12:16:09,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 137 transitions. [2023-11-17 12:16:09,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:09,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 137 transitions. [2023-11-17 12:16:09,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:09,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:09,097 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:09,097 INFO L175 Difference]: Start difference. First operand has 403 places, 1217 transitions, 28541 flow. Second operand 17 states and 137 transitions. [2023-11-17 12:16:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1334 transitions, 34317 flow [2023-11-17 12:16:10,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1334 transitions, 33565 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-11-17 12:16:10,856 INFO L231 Difference]: Finished difference. Result has 412 places, 1297 transitions, 31735 flow [2023-11-17 12:16:10,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=27733, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=31735, PETRI_PLACES=412, PETRI_TRANSITIONS=1297} [2023-11-17 12:16:10,857 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 390 predicate places. [2023-11-17 12:16:10,857 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1297 transitions, 31735 flow [2023-11-17 12:16:10,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:16:10,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:10,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:10,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:11,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 12:16:11,063 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:11,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash 426080947, now seen corresponding path program 35 times [2023-11-17 12:16:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203228022] [2023-11-17 12:16:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:11,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:11,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:11,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203228022] [2023-11-17 12:16:11,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203228022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896938339] [2023-11-17 12:16:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:16:11,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:11,233 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:11,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 12:16:11,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:16:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:11,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:16:11,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:11,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896938339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:11,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:11,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:16:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777528961] [2023-11-17 12:16:11,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:16:11,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:16:11,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:16:11,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:16:11,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1297 transitions, 31735 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 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 12:16:11,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:11,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:16:11,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:14,242 INFO L124 PetriNetUnfolderBase]: 3455/5997 cut-off events. [2023-11-17 12:16:14,242 INFO L125 PetriNetUnfolderBase]: For 251298/251298 co-relation queries the response was YES. [2023-11-17 12:16:14,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73460 conditions, 5997 events. 3455/5997 cut-off events. For 251298/251298 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41311 event pairs, 285 based on Foata normal form. 36/6030 useless extension candidates. Maximal degree in co-relation 73030. Up to 3079 conditions per place. [2023-11-17 12:16:14,328 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 916 selfloop transitions, 431 changer transitions 20/1367 dead transitions. [2023-11-17 12:16:14,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1367 transitions, 36455 flow [2023-11-17 12:16:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:16:14,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:16:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2023-11-17 12:16:14,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2578125 [2023-11-17 12:16:14,329 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 132 transitions. [2023-11-17 12:16:14,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 132 transitions. [2023-11-17 12:16:14,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:14,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 132 transitions. [2023-11-17 12:16:14,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.25) internal successors, (132), 16 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,330 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 32.0) internal successors, (544), 17 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:14,330 INFO L175 Difference]: Start difference. First operand has 412 places, 1297 transitions, 31735 flow. Second operand 16 states and 132 transitions. [2023-11-17 12:16:14,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1367 transitions, 36455 flow [2023-11-17 12:16:16,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1367 transitions, 34840 flow, removed 662 selfloop flow, removed 7 redundant places. [2023-11-17 12:16:16,484 INFO L231 Difference]: Finished difference. Result has 424 places, 1309 transitions, 32166 flow [2023-11-17 12:16:16,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=30620, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=32166, PETRI_PLACES=424, PETRI_TRANSITIONS=1309} [2023-11-17 12:16:16,486 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 402 predicate places. [2023-11-17 12:16:16,486 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1309 transitions, 32166 flow [2023-11-17 12:16:16,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 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 12:16:16,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:16,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:16,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 12:16:16,692 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:16,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1988788177, now seen corresponding path program 36 times [2023-11-17 12:16:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:16,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501561538] [2023-11-17 12:16:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:16:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:17,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501561538] [2023-11-17 12:16:17,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501561538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916230095] [2023-11-17 12:16:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:16:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:17,646 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:17,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 12:16:17,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:16:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:17,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:16:17,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:18,039 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-11-17 12:16:18,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 23 [2023-11-17 12:16:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:16:18,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:18,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:16:18,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 73 [2023-11-17 12:16:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:16:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916230095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:18,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:18,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-11-17 12:16:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095546826] [2023-11-17 12:16:18,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:16:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:18,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:16:18,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:16:18,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:16:18,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1309 transitions, 32166 flow. Second operand has 21 states, 21 states have (on average 7.428571428571429) internal successors, (156), 21 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:18,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:16:18,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:21,358 INFO L124 PetriNetUnfolderBase]: 3461/5996 cut-off events. [2023-11-17 12:16:21,358 INFO L125 PetriNetUnfolderBase]: For 251516/251516 co-relation queries the response was YES. [2023-11-17 12:16:21,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73133 conditions, 5996 events. 3461/5996 cut-off events. For 251516/251516 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 41117 event pairs, 140 based on Foata normal form. 2/5995 useless extension candidates. Maximal degree in co-relation 72703. Up to 3465 conditions per place. [2023-11-17 12:16:21,436 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 858 selfloop transitions, 109 changer transitions 627/1594 dead transitions. [2023-11-17 12:16:21,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1594 transitions, 42820 flow [2023-11-17 12:16:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:16:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:16:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2023-11-17 12:16:21,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2023-11-17 12:16:21,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 143 transitions. [2023-11-17 12:16:21,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 143 transitions. [2023-11-17 12:16:21,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:21,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 143 transitions. [2023-11-17 12:16:21,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:21,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:21,438 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:21,438 INFO L175 Difference]: Start difference. First operand has 424 places, 1309 transitions, 32166 flow. Second operand 12 states and 143 transitions. [2023-11-17 12:16:21,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1594 transitions, 42820 flow [2023-11-17 12:16:23,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 1594 transitions, 42125 flow, removed 118 selfloop flow, removed 6 redundant places. [2023-11-17 12:16:23,494 INFO L231 Difference]: Finished difference. Result has 428 places, 955 transitions, 23226 flow [2023-11-17 12:16:23,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=31670, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23226, PETRI_PLACES=428, PETRI_TRANSITIONS=955} [2023-11-17 12:16:23,495 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 406 predicate places. [2023-11-17 12:16:23,495 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 955 transitions, 23226 flow [2023-11-17 12:16:23,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.428571428571429) internal successors, (156), 21 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:23,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:23,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:23,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-17 12:16:23,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-11-17 12:16:23,695 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:23,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1066338169, now seen corresponding path program 37 times [2023-11-17 12:16:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46897612] [2023-11-17 12:16:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:16:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:24,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46897612] [2023-11-17 12:16:24,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46897612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:24,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295286564] [2023-11-17 12:16:24,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:16:24,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:24,188 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:24,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 12:16:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:24,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 12:16:24,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:24,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:24,932 INFO L349 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2023-11-17 12:16:24,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 109 [2023-11-17 12:16:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:25,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295286564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:25,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:25,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-17 12:16:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556247093] [2023-11-17 12:16:25,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:16:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:16:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:16:25,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:16:25,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 955 transitions, 23226 flow. Second operand has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:25,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:25,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:16:25,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:27,930 INFO L124 PetriNetUnfolderBase]: 3204/5593 cut-off events. [2023-11-17 12:16:27,930 INFO L125 PetriNetUnfolderBase]: For 251232/251232 co-relation queries the response was YES. [2023-11-17 12:16:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68173 conditions, 5593 events. 3204/5593 cut-off events. For 251232/251232 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 38579 event pairs, 123 based on Foata normal form. 2/5595 useless extension candidates. Maximal degree in co-relation 68007. Up to 1846 conditions per place. [2023-11-17 12:16:28,004 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 565 selfloop transitions, 60 changer transitions 1158/1783 dead transitions. [2023-11-17 12:16:28,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1783 transitions, 47698 flow [2023-11-17 12:16:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:16:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:16:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 227 transitions. [2023-11-17 12:16:28,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546875 [2023-11-17 12:16:28,006 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 227 transitions. [2023-11-17 12:16:28,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 227 transitions. [2023-11-17 12:16:28,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:28,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 227 transitions. [2023-11-17 12:16:28,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.35) internal successors, (227), 20 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 32.0) internal successors, (672), 21 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,007 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 32.0) internal successors, (672), 21 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:28,008 INFO L175 Difference]: Start difference. First operand has 428 places, 955 transitions, 23226 flow. Second operand 20 states and 227 transitions. [2023-11-17 12:16:28,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1783 transitions, 47698 flow [2023-11-17 12:16:29,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1783 transitions, 46172 flow, removed 524 selfloop flow, removed 13 redundant places. [2023-11-17 12:16:29,951 INFO L231 Difference]: Finished difference. Result has 430 places, 621 transitions, 14474 flow [2023-11-17 12:16:29,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=22204, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=895, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14474, PETRI_PLACES=430, PETRI_TRANSITIONS=621} [2023-11-17 12:16:29,952 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 408 predicate places. [2023-11-17 12:16:29,952 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 621 transitions, 14474 flow [2023-11-17 12:16:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:29,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:29,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:29,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:30,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:30,159 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:30,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash -281716444, now seen corresponding path program 38 times [2023-11-17 12:16:30,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:30,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915874259] [2023-11-17 12:16:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:30,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915874259] [2023-11-17 12:16:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915874259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279060390] [2023-11-17 12:16:31,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:16:31,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:31,402 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:16:31,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 12:16:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:16:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:31,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 12:16:31,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:34,879 INFO L349 Elim1Store]: treesize reduction 49, result has 53.3 percent of original size [2023-11-17 12:16:34,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 93 [2023-11-17 12:16:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:16:34,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:36,278 INFO L349 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2023-11-17 12:16:36,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 105 [2023-11-17 12:16:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:16:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279060390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:36,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:36,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 19 [2023-11-17 12:16:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105956847] [2023-11-17 12:16:36,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:16:36,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:16:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:16:36,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:16:36,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 621 transitions, 14474 flow. Second operand has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:36,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:36,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:16:36,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:41,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:43,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:45,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:47,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:49,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:50,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:57,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:16:59,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:01,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:03,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:06,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:08,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:09,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:11,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:13,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:16,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:17,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:20,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:24,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:26,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:28,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:30,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:32,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:34,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:36,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:39,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:41,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:43,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:45,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:47,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:49,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:51,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:53,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:54,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:17:56,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:00,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:02,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:03,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:05,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:07,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:09,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:11,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:12,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:14,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:16,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:18,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:20,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:20,979 INFO L124 PetriNetUnfolderBase]: 2846/4756 cut-off events. [2023-11-17 12:18:20,980 INFO L125 PetriNetUnfolderBase]: For 171016/171016 co-relation queries the response was YES. [2023-11-17 12:18:21,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54481 conditions, 4756 events. 2846/4756 cut-off events. For 171016/171016 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29822 event pairs, 118 based on Foata normal form. 1/4757 useless extension candidates. Maximal degree in co-relation 54314. Up to 2174 conditions per place. [2023-11-17 12:18:21,052 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 914 selfloop transitions, 566 changer transitions 15/1495 dead transitions. [2023-11-17 12:18:21,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1495 transitions, 37563 flow [2023-11-17 12:18:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:18:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:18:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 257 transitions. [2023-11-17 12:18:21,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3650568181818182 [2023-11-17 12:18:21,064 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 257 transitions. [2023-11-17 12:18:21,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 257 transitions. [2023-11-17 12:18:21,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:21,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 257 transitions. [2023-11-17 12:18:21,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.681818181818182) internal successors, (257), 22 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:21,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 32.0) internal successors, (736), 23 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:21,065 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 32.0) internal successors, (736), 23 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:21,065 INFO L175 Difference]: Start difference. First operand has 430 places, 621 transitions, 14474 flow. Second operand 22 states and 257 transitions. [2023-11-17 12:18:21,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1495 transitions, 37563 flow [2023-11-17 12:18:22,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1495 transitions, 34612 flow, removed 1098 selfloop flow, removed 29 redundant places. [2023-11-17 12:18:22,245 INFO L231 Difference]: Finished difference. Result has 416 places, 1125 transitions, 25497 flow [2023-11-17 12:18:22,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=13093, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25497, PETRI_PLACES=416, PETRI_TRANSITIONS=1125} [2023-11-17 12:18:22,246 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 394 predicate places. [2023-11-17 12:18:22,246 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1125 transitions, 25497 flow [2023-11-17 12:18:22,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.142857142857143) internal successors, (150), 21 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:22,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:22,246 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:22,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 12:18:22,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:22,452 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:22,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1476603992, now seen corresponding path program 39 times [2023-11-17 12:18:22,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:22,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649180190] [2023-11-17 12:18:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:22,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:18:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649180190] [2023-11-17 12:18:23,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649180190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094202846] [2023-11-17 12:18:23,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:18:23,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:23,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:23,313 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:23,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 12:18:23,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:18:23,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:23,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 12:18:23,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 12:18:23,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:23,805 INFO L349 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2023-11-17 12:18:23,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 97 [2023-11-17 12:18:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 12:18:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094202846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:23,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:23,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 4] total 17 [2023-11-17 12:18:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048034086] [2023-11-17 12:18:23,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:18:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:18:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:18:23,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:18:23,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1125 transitions, 25497 flow. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:23,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:23,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:18:23,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:27,725 INFO L124 PetriNetUnfolderBase]: 5172/8698 cut-off events. [2023-11-17 12:18:27,726 INFO L125 PetriNetUnfolderBase]: For 283731/283731 co-relation queries the response was YES. [2023-11-17 12:18:27,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99021 conditions, 8698 events. 5172/8698 cut-off events. For 283731/283731 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 61207 event pairs, 202 based on Foata normal form. 5/8700 useless extension candidates. Maximal degree in co-relation 98866. Up to 3585 conditions per place. [2023-11-17 12:18:27,850 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 1148 selfloop transitions, 1027 changer transitions 46/2221 dead transitions. [2023-11-17 12:18:27,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 2221 transitions, 56021 flow [2023-11-17 12:18:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:18:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:18:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 255 transitions. [2023-11-17 12:18:27,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2023-11-17 12:18:27,851 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 255 transitions. [2023-11-17 12:18:27,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 255 transitions. [2023-11-17 12:18:27,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:27,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 255 transitions. [2023-11-17 12:18:27,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:27,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 32.0) internal successors, (672), 21 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:27,853 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 32.0) internal successors, (672), 21 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:27,853 INFO L175 Difference]: Start difference. First operand has 416 places, 1125 transitions, 25497 flow. Second operand 20 states and 255 transitions. [2023-11-17 12:18:27,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 2221 transitions, 56021 flow [2023-11-17 12:18:30,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 2221 transitions, 53935 flow, removed 1033 selfloop flow, removed 7 redundant places. [2023-11-17 12:18:30,375 INFO L231 Difference]: Finished difference. Result has 439 places, 1793 transitions, 43126 flow [2023-11-17 12:18:30,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=23875, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=43126, PETRI_PLACES=439, PETRI_TRANSITIONS=1793} [2023-11-17 12:18:30,376 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 417 predicate places. [2023-11-17 12:18:30,377 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1793 transitions, 43126 flow [2023-11-17 12:18:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:30,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:30,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:30,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-17 12:18:30,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-17 12:18:30,577 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:30,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash 136587684, now seen corresponding path program 40 times [2023-11-17 12:18:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792474642] [2023-11-17 12:18:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792474642] [2023-11-17 12:18:32,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792474642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:32,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511840592] [2023-11-17 12:18:32,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:18:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:32,131 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:18:32,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 12:18:32,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:18:32,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:18:32,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 12:18:32,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:37,530 INFO L349 Elim1Store]: treesize reduction 49, result has 53.3 percent of original size [2023-11-17 12:18:37,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 93 [2023-11-17 12:18:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 12:18:37,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:39,282 INFO L349 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2023-11-17 12:18:39,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 105 [2023-11-17 12:18:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:18:39,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511840592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:39,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:39,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 5] total 20 [2023-11-17 12:18:39,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847232020] [2023-11-17 12:18:39,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:39,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:18:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:18:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-17 12:18:39,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:18:39,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1793 transitions, 43126 flow. Second operand has 22 states, 22 states have (on average 7.090909090909091) internal successors, (156), 22 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:39,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:39,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:18:39,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:42,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:44,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:50,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:53,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:55,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:18:57,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:00,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:02,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:04,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:09,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:11,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:13,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:15,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:18,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:19,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:23,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:31,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:34,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-17 12:19:36,024 INFO L124 PetriNetUnfolderBase]: 6781/11346 cut-off events. [2023-11-17 12:19:36,024 INFO L125 PetriNetUnfolderBase]: For 386158/386158 co-relation queries the response was YES. [2023-11-17 12:19:36,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134419 conditions, 11346 events. 6781/11346 cut-off events. For 386158/386158 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 82774 event pairs, 373 based on Foata normal form. 3/11347 useless extension candidates. Maximal degree in co-relation 134252. Up to 7832 conditions per place. [2023-11-17 12:19:36,199 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 1811 selfloop transitions, 759 changer transitions 12/2582 dead transitions. [2023-11-17 12:19:36,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 2582 transitions, 68184 flow [2023-11-17 12:19:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:19:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:19:36,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 226 transitions. [2023-11-17 12:19:36,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2023-11-17 12:19:36,202 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 226 transitions. [2023-11-17 12:19:36,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 226 transitions. [2023-11-17 12:19:36,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:36,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 226 transitions. [2023-11-17 12:19:36,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 10.761904761904763) internal successors, (226), 21 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:36,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 32.0) internal successors, (704), 22 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:36,203 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 32.0) internal successors, (704), 22 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:36,203 INFO L175 Difference]: Start difference. First operand has 439 places, 1793 transitions, 43126 flow. Second operand 21 states and 226 transitions. [2023-11-17 12:19:36,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 2582 transitions, 68184 flow [2023-11-17 12:19:40,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2582 transitions, 65136 flow, removed 1516 selfloop flow, removed 3 redundant places. [2023-11-17 12:19:40,827 INFO L231 Difference]: Finished difference. Result has 465 places, 2275 transitions, 55835 flow [2023-11-17 12:19:40,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=40910, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=55835, PETRI_PLACES=465, PETRI_TRANSITIONS=2275} [2023-11-17 12:19:40,828 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 443 predicate places. [2023-11-17 12:19:40,828 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 2275 transitions, 55835 flow [2023-11-17 12:19:40,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.090909090909091) internal successors, (156), 22 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:40,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:40,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:40,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 12:19:41,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:41,035 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:19:41,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1219735158, now seen corresponding path program 41 times [2023-11-17 12:19:41,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:41,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275378055] [2023-11-17 12:19:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:41,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:42,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275378055] [2023-11-17 12:19:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275378055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316574936] [2023-11-17 12:19:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:19:42,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:42,460 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:19:42,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 12:19:42,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:19:42,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:42,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 12:19:42,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:42,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 12:19:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:42,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-17 12:19:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:19:42,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-17 12:19:42,714 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 12:19:42,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 12:19:42,886 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:19:42,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 72 [2023-11-17 12:19:42,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:42,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 45 [2023-11-17 12:19:43,190 INFO L349 Elim1Store]: treesize reduction 28, result has 73.3 percent of original size [2023-11-17 12:19:43,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 125 treesize of output 119 [2023-11-17 12:19:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:19:43,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:45,620 INFO L349 Elim1Store]: treesize reduction 53, result has 53.9 percent of original size [2023-11-17 12:19:45,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 207 treesize of output 156 [2023-11-17 12:19:45,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:19:45,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2023-11-17 12:19:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:19:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316574936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:45,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2023-11-17 12:19:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525606999] [2023-11-17 12:19:45,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:45,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 12:19:45,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 12:19:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=562, Unknown=5, NotChecked=0, Total=650 [2023-11-17 12:19:45,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:19:45,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 2275 transitions, 55835 flow. Second operand has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 26 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:45,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:45,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:19:45,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:58,125 INFO L124 PetriNetUnfolderBase]: 8106/13683 cut-off events. [2023-11-17 12:19:58,126 INFO L125 PetriNetUnfolderBase]: For 494651/494651 co-relation queries the response was YES. [2023-11-17 12:19:58,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163764 conditions, 13683 events. 8106/13683 cut-off events. For 494651/494651 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 103189 event pairs, 301 based on Foata normal form. 5/13688 useless extension candidates. Maximal degree in co-relation 163587. Up to 9896 conditions per place. [2023-11-17 12:19:58,366 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 2114 selfloop transitions, 748 changer transitions 15/2877 dead transitions. [2023-11-17 12:19:58,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 2877 transitions, 77953 flow [2023-11-17 12:19:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:19:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:19:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 317 transitions. [2023-11-17 12:19:58,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35379464285714285 [2023-11-17 12:19:58,367 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 317 transitions. [2023-11-17 12:19:58,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 317 transitions. [2023-11-17 12:19:58,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:58,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 317 transitions. [2023-11-17 12:19:58,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 11.321428571428571) internal successors, (317), 28 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:58,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 32.0) internal successors, (928), 29 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:58,369 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 32.0) internal successors, (928), 29 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:58,369 INFO L175 Difference]: Start difference. First operand has 465 places, 2275 transitions, 55835 flow. Second operand 28 states and 317 transitions. [2023-11-17 12:19:58,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 2877 transitions, 77953 flow [2023-11-17 12:20:04,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2877 transitions, 75036 flow, removed 1438 selfloop flow, removed 9 redundant places. [2023-11-17 12:20:04,769 INFO L231 Difference]: Finished difference. Result has 496 places, 2650 transitions, 67743 flow [2023-11-17 12:20:04,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=54039, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=67743, PETRI_PLACES=496, PETRI_TRANSITIONS=2650} [2023-11-17 12:20:04,771 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 474 predicate places. [2023-11-17 12:20:04,771 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2650 transitions, 67743 flow [2023-11-17 12:20:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 26 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:04,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:04,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:04,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-17 12:20:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-17 12:20:04,972 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:20:04,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1475680628, now seen corresponding path program 42 times [2023-11-17 12:20:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:04,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326333709] [2023-11-17 12:20:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:20:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:06,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326333709] [2023-11-17 12:20:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326333709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:06,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526977185] [2023-11-17 12:20:06,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:20:06,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:06,031 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:20:06,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 12:20:06,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:20:06,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:06,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:20:06,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:06,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:20:06,404 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-17 12:20:06,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2023-11-17 12:20:06,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-17 12:20:07,026 INFO L349 Elim1Store]: treesize reduction 80, result has 77.3 percent of original size [2023-11-17 12:20:07,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 323 [2023-11-17 12:20:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:20:29,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:29,545 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1866 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1866))) (let ((.cse3 (select .cse2 c_~f_inv~0.base))) (let ((.cse0 (select .cse3 (+ (* c_~counter~0 4) c_~f_inv~0.offset)))) (let ((.cse1 (select (select .cse2 c_~f~0.base) (+ c_~f~0.offset (* (select .cse3 (+ (* .cse0 4) c_~f_inv~0.offset)) 4))))) (or (not (= .cse0 .cse1)) (= .cse1 0))))))) is different from false [2023-11-17 12:20:29,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:20:29,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 400 treesize of output 310 [2023-11-17 12:20:29,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:20:29,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 373 treesize of output 285 [2023-11-17 12:20:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:32,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526977185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:32,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:32,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 26 [2023-11-17 12:20:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280710574] [2023-11-17 12:20:32,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:32,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:20:32,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:32,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:20:32,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=607, Unknown=1, NotChecked=50, Total=756 [2023-11-17 12:20:32,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2023-11-17 12:20:32,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2650 transitions, 67743 flow. Second operand has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 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 12:20:32,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:32,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2023-11-17 12:20:32,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:20:46,681 INFO L124 PetriNetUnfolderBase]: 9833/16694 cut-off events. [2023-11-17 12:20:46,681 INFO L125 PetriNetUnfolderBase]: For 621451/621451 co-relation queries the response was YES. [2023-11-17 12:20:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200403 conditions, 16694 events. 9833/16694 cut-off events. For 621451/621451 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 130592 event pairs, 299 based on Foata normal form. 3/16697 useless extension candidates. Maximal degree in co-relation 200212. Up to 8613 conditions per place. [2023-11-17 12:20:46,991 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 1813 selfloop transitions, 1601 changer transitions 26/3440 dead transitions. [2023-11-17 12:20:46,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 3440 transitions, 94687 flow [2023-11-17 12:20:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:20:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:20:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 248 transitions. [2023-11-17 12:20:46,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2023-11-17 12:20:46,993 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 248 transitions. [2023-11-17 12:20:46,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 248 transitions. [2023-11-17 12:20:46,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:20:46,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 248 transitions. [2023-11-17 12:20:46,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.80952380952381) internal successors, (248), 21 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:46,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 32.0) internal successors, (704), 22 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:46,994 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 32.0) internal successors, (704), 22 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:46,994 INFO L175 Difference]: Start difference. First operand has 496 places, 2650 transitions, 67743 flow. Second operand 21 states and 248 transitions. [2023-11-17 12:20:46,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 3440 transitions, 94687 flow [2023-11-17 12:20:56,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 3440 transitions, 92543 flow, removed 1062 selfloop flow, removed 7 redundant places. [2023-11-17 12:20:56,989 INFO L231 Difference]: Finished difference. Result has 517 places, 3136 transitions, 84907 flow [2023-11-17 12:20:56,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=65921, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=84907, PETRI_PLACES=517, PETRI_TRANSITIONS=3136} [2023-11-17 12:20:56,991 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 495 predicate places. [2023-11-17 12:20:56,991 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 3136 transitions, 84907 flow [2023-11-17 12:20:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 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 12:20:56,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:56,992 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:56,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-17 12:20:57,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:57,192 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:20:57,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:57,193 INFO L85 PathProgramCache]: Analyzing trace with hash -872083276, now seen corresponding path program 43 times [2023-11-17 12:20:57,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:57,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780517411] [2023-11-17 12:20:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:57,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:57,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780517411] [2023-11-17 12:20:57,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780517411] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:57,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276985904] [2023-11-17 12:20:57,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:20:57,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:57,301 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:20:57,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 12:20:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:57,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:20:57,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:57,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:20:57,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276985904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:57,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:57,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:20:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993914557] [2023-11-17 12:20:57,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:57,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:20:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:20:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:20:57,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:20:57,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 3136 transitions, 84907 flow. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 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 12:20:57,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:57,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:20:57,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:14,709 INFO L124 PetriNetUnfolderBase]: 11321/19307 cut-off events. [2023-11-17 12:21:14,710 INFO L125 PetriNetUnfolderBase]: For 790564/790564 co-relation queries the response was YES. [2023-11-17 12:21:15,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239742 conditions, 19307 events. 11321/19307 cut-off events. For 790564/790564 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 155906 event pairs, 2444 based on Foata normal form. 16/19323 useless extension candidates. Maximal degree in co-relation 239542. Up to 14452 conditions per place. [2023-11-17 12:21:15,374 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 2959 selfloop transitions, 682 changer transitions 32/3673 dead transitions. [2023-11-17 12:21:15,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 3673 transitions, 106565 flow [2023-11-17 12:21:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:21:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:21:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2023-11-17 12:21:15,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2023-11-17 12:21:15,375 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 91 transitions. [2023-11-17 12:21:15,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 91 transitions. [2023-11-17 12:21:15,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:15,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 91 transitions. [2023-11-17 12:21:15,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 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 12:21:15,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:15,376 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:15,376 INFO L175 Difference]: Start difference. First operand has 517 places, 3136 transitions, 84907 flow. Second operand 9 states and 91 transitions. [2023-11-17 12:21:15,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 3673 transitions, 106565 flow [2023-11-17 12:21:29,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 3673 transitions, 104407 flow, removed 1061 selfloop flow, removed 5 redundant places. [2023-11-17 12:21:29,900 INFO L231 Difference]: Finished difference. Result has 525 places, 3408 transitions, 92835 flow [2023-11-17 12:21:29,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=83127, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=92835, PETRI_PLACES=525, PETRI_TRANSITIONS=3408} [2023-11-17 12:21:29,902 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 503 predicate places. [2023-11-17 12:21:29,902 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 3408 transitions, 92835 flow [2023-11-17 12:21:29,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 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 12:21:29,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:21:29,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:21:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 12:21:30,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:21:30,103 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:21:30,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:21:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2075780770, now seen corresponding path program 44 times [2023-11-17 12:21:30,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:21:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109486197] [2023-11-17 12:21:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:21:30,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:21:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:21:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:21:30,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:21:30,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109486197] [2023-11-17 12:21:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109486197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:21:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954811501] [2023-11-17 12:21:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:21:30,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:21:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:21:30,229 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:21:30,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 12:21:30,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:21:30,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:21:30,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:21:30,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:21:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:21:30,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:21:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:21:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954811501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:21:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:21:30,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:21:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544853475] [2023-11-17 12:21:30,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:21:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:21:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:21:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:21:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:21:30,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:21:30,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 3408 transitions, 92835 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:30,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:21:30,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:21:30,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:49,264 INFO L124 PetriNetUnfolderBase]: 12074/20200 cut-off events. [2023-11-17 12:21:49,264 INFO L125 PetriNetUnfolderBase]: For 870676/870676 co-relation queries the response was YES. [2023-11-17 12:21:49,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258457 conditions, 20200 events. 12074/20200 cut-off events. For 870676/870676 co-relation queries the response was YES. Maximal size of possible extension queue 1435. Compared 160625 event pairs, 2363 based on Foata normal form. 150/20350 useless extension candidates. Maximal degree in co-relation 258251. Up to 15534 conditions per place. [2023-11-17 12:21:49,663 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 2436 selfloop transitions, 1571 changer transitions 2/4009 dead transitions. [2023-11-17 12:21:49,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 4009 transitions, 118706 flow [2023-11-17 12:21:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:21:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:21:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 209 transitions. [2023-11-17 12:21:49,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23325892857142858 [2023-11-17 12:21:49,664 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 209 transitions. [2023-11-17 12:21:49,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 209 transitions. [2023-11-17 12:21:49,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:49,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 209 transitions. [2023-11-17 12:21:49,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.464285714285714) internal successors, (209), 28 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:49,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 32.0) internal successors, (928), 29 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:49,666 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 32.0) internal successors, (928), 29 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:49,666 INFO L175 Difference]: Start difference. First operand has 525 places, 3408 transitions, 92835 flow. Second operand 28 states and 209 transitions. [2023-11-17 12:21:49,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 4009 transitions, 118706 flow [2023-11-17 12:22:03,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 4009 transitions, 117204 flow, removed 364 selfloop flow, removed 7 redundant places. [2023-11-17 12:22:03,762 INFO L231 Difference]: Finished difference. Result has 552 places, 3862 transitions, 111487 flow [2023-11-17 12:22:03,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=91222, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1986, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=111487, PETRI_PLACES=552, PETRI_TRANSITIONS=3862} [2023-11-17 12:22:03,765 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 530 predicate places. [2023-11-17 12:22:03,765 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 3862 transitions, 111487 flow [2023-11-17 12:22:03,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:03,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:03,765 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:03,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 12:22:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-17 12:22:03,967 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:22:03,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2109382561, now seen corresponding path program 45 times [2023-11-17 12:22:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:03,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623770234] [2023-11-17 12:22:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:22:04,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623770234] [2023-11-17 12:22:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623770234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:04,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567674074] [2023-11-17 12:22:04,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:22:04,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:04,081 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:22:04,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 12:22:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:22:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:04,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:22:04,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:22:04,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:22:04,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567674074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:04,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:04,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:22:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326667775] [2023-11-17 12:22:04,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:22:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:22:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:22:04,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:22:04,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 3862 transitions, 111487 flow. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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 12:22:04,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:04,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:22:04,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:22:28,346 INFO L124 PetriNetUnfolderBase]: 13453/22587 cut-off events. [2023-11-17 12:22:28,347 INFO L125 PetriNetUnfolderBase]: For 949934/949934 co-relation queries the response was YES. [2023-11-17 12:22:28,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294577 conditions, 22587 events. 13453/22587 cut-off events. For 949934/949934 co-relation queries the response was YES. Maximal size of possible extension queue 1582. Compared 182519 event pairs, 668 based on Foata normal form. 284/22871 useless extension candidates. Maximal degree in co-relation 294364. Up to 7828 conditions per place. [2023-11-17 12:22:28,824 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 3213 selfloop transitions, 1317 changer transitions 4/4534 dead transitions. [2023-11-17 12:22:28,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 4534 transitions, 138221 flow [2023-11-17 12:22:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:22:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:22:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 122 transitions. [2023-11-17 12:22:28,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2932692307692308 [2023-11-17 12:22:28,825 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 122 transitions. [2023-11-17 12:22:28,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 122 transitions. [2023-11-17 12:22:28,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:22:28,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 122 transitions. [2023-11-17 12:22:28,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.384615384615385) internal successors, (122), 13 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:28,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 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 12:22:28,827 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 32.0) internal successors, (448), 14 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 12:22:28,827 INFO L175 Difference]: Start difference. First operand has 552 places, 3862 transitions, 111487 flow. Second operand 13 states and 122 transitions. [2023-11-17 12:22:28,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 4534 transitions, 138221 flow [2023-11-17 12:22:49,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 4534 transitions, 130488 flow, removed 3436 selfloop flow, removed 9 redundant places. [2023-11-17 12:22:49,848 INFO L231 Difference]: Finished difference. Result has 561 places, 4229 transitions, 117834 flow [2023-11-17 12:22:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=103754, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=950, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=117834, PETRI_PLACES=561, PETRI_TRANSITIONS=4229} [2023-11-17 12:22:49,851 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 539 predicate places. [2023-11-17 12:22:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 4229 transitions, 117834 flow [2023-11-17 12:22:49,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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 12:22:49,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:49,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:49,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 12:22:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-17 12:22:50,058 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:22:50,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1331682845, now seen corresponding path program 46 times [2023-11-17 12:22:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657144174] [2023-11-17 12:22:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:22:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657144174] [2023-11-17 12:22:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657144174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111762638] [2023-11-17 12:22:50,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:22:50,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:50,167 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:22:50,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 12:22:50,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:22:50,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:50,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:22:50,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:22:50,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:22:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111762638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:50,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:50,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:22:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447410114] [2023-11-17 12:22:50,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:50,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:22:50,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:22:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:22:50,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 32 [2023-11-17 12:22:50,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 4229 transitions, 117834 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:50,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:50,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 32 [2023-11-17 12:22:50,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 12:23:09,379 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:23:09,379 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:23:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:23:09,737 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:23:09,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-17 12:23:09,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-17 12:23:09,938 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (15states, 3/32 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 227317 conditions, 17003 events (10340/17002 cut-off events. For 790019/790019 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 141926 event pairs, 778 based on Foata normal form. 292/18654 useless extension candidates. Maximal degree in co-relation 227097. Up to 5448 conditions per place.). [2023-11-17 12:23:09,940 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:23:09,940 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:23:09,940 INFO L445 BasicCegarLoop]: Path program histogram: [46, 6, 6, 1, 1, 1] [2023-11-17 12:23:09,943 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:23:09,943 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:23:09,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:23:09 BasicIcfg [2023-11-17 12:23:09,945 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:23:09,945 INFO L158 Benchmark]: Toolchain (without parser) took 522001.89ms. Allocated memory was 306.2MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 252.1MB in the beginning and 3.3GB in the end (delta: -3.1GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 12:23:09,945 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 143.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:23:09,945 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.59ms. Allocated memory is still 306.2MB. Free memory was 251.5MB in the beginning and 240.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:23:09,945 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.54ms. Allocated memory is still 306.2MB. Free memory was 240.0MB in the beginning and 237.4MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 12:23:09,946 INFO L158 Benchmark]: Boogie Preprocessor took 51.48ms. Allocated memory is still 306.2MB. Free memory was 237.4MB in the beginning and 235.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:23:09,946 INFO L158 Benchmark]: RCFGBuilder took 766.59ms. Allocated memory is still 306.2MB. Free memory was 235.8MB in the beginning and 175.0MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. [2023-11-17 12:23:09,946 INFO L158 Benchmark]: TraceAbstraction took 520816.49ms. Allocated memory was 306.2MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 174.5MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 12:23:09,947 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 194.0MB. Free memory is still 143.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 298.59ms. Allocated memory is still 306.2MB. Free memory was 251.5MB in the beginning and 240.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 61.54ms. Allocated memory is still 306.2MB. Free memory was 240.0MB in the beginning and 237.4MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 51.48ms. Allocated memory is still 306.2MB. Free memory was 237.4MB in the beginning and 235.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 766.59ms. Allocated memory is still 306.2MB. Free memory was 235.8MB in the beginning and 175.0MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. * TraceAbstraction took 520816.49ms. Allocated memory was 306.2MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 174.5MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.8s, 27 PlacesBefore, 22 PlacesAfterwards, 24 TransitionsBefore, 19 TransitionsAfterwards, 110 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 146 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 145, independent: 140, independent conditional: 0, independent unconditional: 140, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 75, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 75, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 5, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 49, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 145, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 75, unknown conditional: 0, unknown unconditional: 75] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (15states, 3/32 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 227317 conditions, 17003 events (10340/17002 cut-off events. For 790019/790019 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 141926 event pairs, 778 based on Foata normal form. 292/18654 useless extension candidates. Maximal degree in co-relation 227097. Up to 5448 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (15states, 3/32 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 227317 conditions, 17003 events (10340/17002 cut-off events. For 790019/790019 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 141926 event pairs, 778 based on Foata normal form. 292/18654 useless extension candidates. Maximal degree in co-relation 227097. Up to 5448 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (15states, 3/32 universal loopers) in iteration 61,while PetriNetUnfolder was constructing finite prefix that currently has 227317 conditions, 17003 events (10340/17002 cut-off events. For 790019/790019 co-relation queries the response was YES. Maximal size of possible extension queue 1751. Compared 141926 event pairs, 778 based on Foata normal form. 292/18654 useless extension candidates. Maximal degree in co-relation 227097. Up to 5448 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 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: 520.7s, OverallIterations: 61, TraceHistogramMax: 3, PathProgramHistogramMax: 46, EmptinessCheckTime: 0.0s, AutomataDifference: 437.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 51 mSolverCounterUnknown, 2870 SdHoareTripleChecker+Valid, 156.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2870 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 152.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 135 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 529 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17589 IncrementalHoareTripleChecker+Invalid, 18304 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 529 mSolverCounterUnsat, 0 mSDtfsCounter, 17589 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2843 GetRequests, 1768 SyntacticMatches, 132 SemanticMatches, 943 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5302 ImplicationChecksByTransitivity, 40.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117834occurred in iteration=60, InterpolantAutomatonStates: 778, 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: 0.9s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 61.6s InterpolantComputationTime, 2327 NumberOfCodeBlocks, 2268 NumberOfCodeBlocksAsserted, 155 NumberOfCheckSat, 3217 ConstructedInterpolants, 30 QuantifiedInterpolants, 16392 SizeOfPredicates, 176 NumberOfNonLiveVariables, 10970 ConjunctsInSsa, 483 ConjunctsInUnsatCore, 160 InterpolantComputations, 12 PerfectInterpolantSequences, 872/1388 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown