/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:41:48,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:41:48,269 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-VariableLbe.epf [2023-08-23 22:41:48,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:41:48,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:41:48,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:41:48,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:41:48,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:41:48,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:41:48,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:41:48,307 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:41:48,307 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:41:48,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:41:48,309 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:41:48,309 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:41:48,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:41:48,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:41:48,309 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:41:48,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:41:48,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:41:48,310 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:41:48,310 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:41:48,311 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:41:48,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:41:48,311 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:41:48,312 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:41:48,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:41:48,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:48,312 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:41:48,312 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:41:48,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:41:48,314 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:41:48,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:41:48,314 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:41:48,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:41:48,314 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:41:48,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:41:48,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:41:48,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:41:48,674 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:41:48,674 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:41:48,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-23 22:41:49,762 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:41:50,041 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:41:50,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-23 22:41:50,068 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ce9513d/fe4377b4d2b1459bb008124acdfec257/FLAG24e20e922 [2023-08-23 22:41:50,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ce9513d/fe4377b4d2b1459bb008124acdfec257 [2023-08-23 22:41:50,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:41:50,084 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:41:50,085 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:50,085 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:41:50,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:41:50,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,089 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d41367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50, skipping insertion in model container [2023-08-23 22:41:50,089 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,132 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:41:50,372 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2023-08-23 22:41:50,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:50,383 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:41:50,414 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-23 22:41:50,415 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-23 22:41:50,438 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2023-08-23 22:41:50,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:50,473 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:41:50,473 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:41:50,480 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:41:50,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50 WrapperNode [2023-08-23 22:41:50,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:50,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:50,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:41:50,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:41:50,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,523 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-23 22:41:50,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:50,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:41:50,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:41:50,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:41:50,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,565 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:41:50,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:41:50,568 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:41:50,568 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:41:50,569 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (1/1) ... [2023-08-23 22:41:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:50,602 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) [2023-08-23 22:41:50,628 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 [2023-08-23 22:41:50,644 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-23 22:41:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-23 22:41:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-23 22:41:50,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-23 22:41:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:41:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:41:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:41:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:41:50,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:41:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:41:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:41:50,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:41:50,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:41:50,649 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:41:50,784 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:41:50,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:41:50,896 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:41:50,902 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:41:50,902 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-23 22:41:50,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:50 BoogieIcfgContainer [2023-08-23 22:41:50,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:41:50,907 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:41:50,907 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:41:50,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:41:50,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:41:50" (1/3) ... [2023-08-23 22:41:50,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e95bed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:50, skipping insertion in model container [2023-08-23 22:41:50,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:50" (2/3) ... [2023-08-23 22:41:50,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e95bed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:50, skipping insertion in model container [2023-08-23 22:41:50,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:50" (3/3) ... [2023-08-23 22:41:50,913 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-08-23 22:41:50,930 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:41:50,931 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:41:50,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:41:51,021 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:41:51,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 146 flow [2023-08-23 22:41:51,116 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-23 22:41:51,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:51,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-23 22:41:51,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 68 transitions, 146 flow [2023-08-23 22:41:51,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:51,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:41:51,176 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:51,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:51,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:51,209 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-23 22:41:51,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:51,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-23 22:41:51,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 1200 [2023-08-23 22:41:53,068 INFO L134 LiptonReduction]: Checked pairs total: 1095 [2023-08-23 22:41:53,069 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-23 22:41:53,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:41:53,086 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=LoopsAndPotentialCycles, 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;@413e5e7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:41:53,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:41:53,090 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:41:53,090 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-23 22:41:53,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:53,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:53,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:41:53,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:53,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:53,096 INFO L85 PathProgramCache]: Analyzing trace with hash -541533417, now seen corresponding path program 1 times [2023-08-23 22:41:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:53,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119811954] [2023-08-23 22:41:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:53,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119811954] [2023-08-23 22:41:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119811954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:41:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092887242] [2023-08-23 22:41:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:53,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:41:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:41:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:41:53,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:53,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:53,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:53,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:53,621 INFO L124 PetriNetUnfolderBase]: 94/152 cut-off events. [2023-08-23 22:41:53,621 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:41:53,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-08-23 22:41:53,623 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-08-23 22:41:53,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-08-23 22:41:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 22:41:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 22:41:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-23 22:41:53,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470703125 [2023-08-23 22:41:53,636 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-23 22:41:53,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-23 22:41:53,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:53,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-23 22:41:53,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,648 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 241 transitions. [2023-08-23 22:41:53,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-08-23 22:41:53,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:41:53,652 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-08-23 22:41:53,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-23 22:41:53,656 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-23 22:41:53,657 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-08-23 22:41:53,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:53,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:53,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:41:53,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:53,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash -722991115, now seen corresponding path program 1 times [2023-08-23 22:41:53,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:53,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945490946] [2023-08-23 22:41:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:53,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945490946] [2023-08-23 22:41:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945490946] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:53,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:53,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:41:53,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37775046] [2023-08-23 22:41:53,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:53,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:41:53,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:53,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:41:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:41:53,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:53,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:53,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:53,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:53,902 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-23 22:41:53,902 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-23 22:41:53,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-08-23 22:41:53,904 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-23 22:41:53,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-08-23 22:41:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:41:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:41:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-08-23 22:41:53,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-23 22:41:53,907 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-08-23 22:41:53,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-08-23 22:41:53,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:53,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-08-23 22:41:53,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,912 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,912 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-08-23 22:41:53,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-08-23 22:41:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:41:53,914 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-08-23 22:41:53,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-23 22:41:53,915 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-08-23 22:41:53,915 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-08-23 22:41:53,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:53,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:53,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:41:53,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:53,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -722976235, now seen corresponding path program 2 times [2023-08-23 22:41:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:53,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921559387] [2023-08-23 22:41:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:54,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:54,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921559387] [2023-08-23 22:41:54,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921559387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:54,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:54,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:41:54,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056709442] [2023-08-23 22:41:54,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:54,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:41:54,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:41:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:41:54,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:54,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:54,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:54,143 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-23 22:41:54,143 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-23 22:41:54,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-08-23 22:41:54,148 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-08-23 22:41:54,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-08-23 22:41:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:41:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:41:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-08-23 22:41:54,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609375 [2023-08-23 22:41:54,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-08-23 22:41:54,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-08-23 22:41:54,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:54,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-08-23 22:41:54,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 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) [2023-08-23 22:41:54,158 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 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) [2023-08-23 22:41:54,158 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 413 transitions. [2023-08-23 22:41:54,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-08-23 22:41:54,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-23 22:41:54,163 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-08-23 22:41:54,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-23 22:41:54,165 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-08-23 22:41:54,167 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-08-23 22:41:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:54,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:41:54,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:54,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1288779972, now seen corresponding path program 1 times [2023-08-23 22:41:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97870590] [2023-08-23 22:41:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:54,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:54,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97870590] [2023-08-23 22:41:54,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97870590] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:54,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:54,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:41:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944153199] [2023-08-23 22:41:54,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:54,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:41:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:41:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:41:54,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:54,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:54,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:54,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:54,425 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-23 22:41:54,425 INFO L125 PetriNetUnfolderBase]: For 777/777 co-relation queries the response was YES. [2023-08-23 22:41:54,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 942 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-08-23 22:41:54,427 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-08-23 22:41:54,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-08-23 22:41:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-23 22:41:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-23 22:41:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-23 22:41:54,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458984375 [2023-08-23 22:41:54,429 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-23 22:41:54,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-23 22:41:54,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:54,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-23 22:41:54,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,433 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,433 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 470 transitions. [2023-08-23 22:41:54,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-08-23 22:41:54,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-23 22:41:54,439 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-08-23 22:41:54,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-23 22:41:54,440 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-08-23 22:41:54,440 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-08-23 22:41:54,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:54,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:54,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:41:54,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:54,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1319181672, now seen corresponding path program 2 times [2023-08-23 22:41:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:54,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150577193] [2023-08-23 22:41:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:54,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150577193] [2023-08-23 22:41:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150577193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:54,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:41:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890790898] [2023-08-23 22:41:54,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:41:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:41:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:41:54,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:54,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:54,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:54,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:54,654 INFO L124 PetriNetUnfolderBase]: 154/271 cut-off events. [2023-08-23 22:41:54,655 INFO L125 PetriNetUnfolderBase]: For 1323/1323 co-relation queries the response was YES. [2023-08-23 22:41:54,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 923 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-08-23 22:41:54,657 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-08-23 22:41:54,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-08-23 22:41:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:41:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:41:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 411 transitions. [2023-08-23 22:41:54,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2023-08-23 22:41:54,660 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 411 transitions. [2023-08-23 22:41:54,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 411 transitions. [2023-08-23 22:41:54,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:54,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 411 transitions. [2023-08-23 22:41:54,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 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) [2023-08-23 22:41:54,663 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 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) [2023-08-23 22:41:54,663 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 411 transitions. [2023-08-23 22:41:54,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-08-23 22:41:54,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-23 22:41:54,672 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-08-23 22:41:54,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-23 22:41:54,674 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-08-23 22:41:54,674 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-08-23 22:41:54,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:54,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:54,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:41:54,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:54,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2055022021, now seen corresponding path program 3 times [2023-08-23 22:41:54,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:54,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896673057] [2023-08-23 22:41:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:54,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:54,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896673057] [2023-08-23 22:41:54,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896673057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:54,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645987164] [2023-08-23 22:41:54,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:41:54,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:54,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:54,801 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) [2023-08-23 22:41:54,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 22:41:54,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-23 22:41:54,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:54,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-23 22:41:54,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:54,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:55,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645987164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:55,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:55,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-23 22:41:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924422771] [2023-08-23 22:41:55,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:55,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 22:41:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 22:41:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-08-23 22:41:55,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:55,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 13 states, 13 states have (on average 54.84615384615385) internal successors, (713), 13 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:55,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:55,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:55,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:55,287 INFO L124 PetriNetUnfolderBase]: 202/351 cut-off events. [2023-08-23 22:41:55,287 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2023-08-23 22:41:55,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1199 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-08-23 22:41:55,290 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2023-08-23 22:41:55,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2023-08-23 22:41:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-23 22:41:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-23 22:41:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 816 transitions. [2023-08-23 22:41:55,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2023-08-23 22:41:55,294 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 816 transitions. [2023-08-23 22:41:55,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 816 transitions. [2023-08-23 22:41:55,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:55,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 816 transitions. [2023-08-23 22:41:55,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.285714285714285) internal successors, (816), 14 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:55,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:55,301 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:55,301 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 816 transitions. [2023-08-23 22:41:55,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2023-08-23 22:41:55,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-23 22:41:55,308 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2023-08-23 22:41:55,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-23 22:41:55,309 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2023-08-23 22:41:55,309 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2023-08-23 22:41:55,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.84615384615385) internal successors, (713), 13 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:55,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:55,310 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:55,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:55,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-23 22:41:55,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:55,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -728579416, now seen corresponding path program 4 times [2023-08-23 22:41:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811934487] [2023-08-23 22:41:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:55,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811934487] [2023-08-23 22:41:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811934487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546622992] [2023-08-23 22:41:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:41:55,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:55,652 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) [2023-08-23 22:41:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 22:41:55,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:41:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:55,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:41:55,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:55,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:55,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546622992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:55,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:55,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-23 22:41:55,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895282840] [2023-08-23 22:41:55,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:55,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:41:55,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:41:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:41:55,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:55,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:55,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:55,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:55,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:56,197 INFO L124 PetriNetUnfolderBase]: 258/463 cut-off events. [2023-08-23 22:41:56,197 INFO L125 PetriNetUnfolderBase]: For 4313/4313 co-relation queries the response was YES. [2023-08-23 22:41:56,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1653 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2023-08-23 22:41:56,201 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-08-23 22:41:56,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2023-08-23 22:41:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-23 22:41:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-23 22:41:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-08-23 22:41:56,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45458984375 [2023-08-23 22:41:56,205 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-08-23 22:41:56,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-08-23 22:41:56,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:56,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-08-23 22:41:56,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:56,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:56,211 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:56,211 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 931 transitions. [2023-08-23 22:41:56,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2023-08-23 22:41:56,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-23 22:41:56,226 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2023-08-23 22:41:56,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-08-23 22:41:56,227 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-08-23 22:41:56,227 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2023-08-23 22:41:56,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:56,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:56,228 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:56,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:56,436 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,SelfDestructingSolverStorable6 [2023-08-23 22:41:56,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:56,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash 71425160, now seen corresponding path program 5 times [2023-08-23 22:41:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:56,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038548950] [2023-08-23 22:41:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:56,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:56,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038548950] [2023-08-23 22:41:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038548950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314833835] [2023-08-23 22:41:56,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:41:56,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:56,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:56,604 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) [2023-08-23 22:41:56,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 22:41:56,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-23 22:41:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:56,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:41:56,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:56,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:56,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314833835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:56,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:56,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-23 22:41:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920766990] [2023-08-23 22:41:56,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-23 22:41:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-23 22:41:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-23 22:41:56,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:56,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:56,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:56,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:56,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:57,347 INFO L124 PetriNetUnfolderBase]: 412/755 cut-off events. [2023-08-23 22:41:57,347 INFO L125 PetriNetUnfolderBase]: For 12133/12133 co-relation queries the response was YES. [2023-08-23 22:41:57,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12133/12133 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3352 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2023-08-23 22:41:57,353 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-08-23 22:41:57,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2023-08-23 22:41:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-23 22:41:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-23 22:41:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-08-23 22:41:57,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-23 22:41:57,357 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-08-23 22:41:57,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-08-23 22:41:57,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:57,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-08-23 22:41:57,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.18181818181818) internal successors, (1280), 22 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:57,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:57,366 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:57,366 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1280 transitions. [2023-08-23 22:41:57,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2023-08-23 22:41:57,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-23 22:41:57,424 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2023-08-23 22:41:57,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-08-23 22:41:57,425 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-08-23 22:41:57,425 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2023-08-23 22:41:57,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:57,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:57,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:57,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:57,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:57,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:57,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash 527212936, now seen corresponding path program 6 times [2023-08-23 22:41:57,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:57,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915870408] [2023-08-23 22:41:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915870408] [2023-08-23 22:41:57,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915870408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:57,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304578381] [2023-08-23 22:41:57,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:41:57,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:57,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:57,740 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) [2023-08-23 22:41:57,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-23 22:41:57,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-23 22:41:57,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:57,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-23 22:41:57,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:57,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:57,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304578381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:57,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:57,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-23 22:41:57,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499071431] [2023-08-23 22:41:57,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:57,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:41:57,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:41:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:41:57,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:57,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:57,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:57,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:57,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:58,488 INFO L124 PetriNetUnfolderBase]: 612/1111 cut-off events. [2023-08-23 22:41:58,488 INFO L125 PetriNetUnfolderBase]: For 38007/38007 co-relation queries the response was YES. [2023-08-23 22:41:58,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 38007/38007 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5400 event pairs, 35 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2023-08-23 22:41:58,500 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-08-23 22:41:58,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2023-08-23 22:41:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-23 22:41:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-23 22:41:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1571 transitions. [2023-08-23 22:41:58,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45457175925925924 [2023-08-23 22:41:58,505 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1571 transitions. [2023-08-23 22:41:58,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1571 transitions. [2023-08-23 22:41:58,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:58,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1571 transitions. [2023-08-23 22:41:58,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.18518518518518) internal successors, (1571), 27 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:58,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:58,515 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:58,515 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1571 transitions. [2023-08-23 22:41:58,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2023-08-23 22:41:58,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2023-08-23 22:41:58,595 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2023-08-23 22:41:58,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-08-23 22:41:58,596 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-08-23 22:41:58,596 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2023-08-23 22:41:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:58,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:58,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:58,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:58,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:58,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1394490875, now seen corresponding path program 7 times [2023-08-23 22:41:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:58,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278498478] [2023-08-23 22:41:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:58,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:58,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278498478] [2023-08-23 22:41:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278498478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953902019] [2023-08-23 22:41:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-23 22:41:58,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:58,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:58,928 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) [2023-08-23 22:41:58,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-23 22:41:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:59,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-23 22:41:59,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:59,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:59,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953902019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:59,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:59,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-23 22:41:59,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680820432] [2023-08-23 22:41:59,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:59,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-23 22:41:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-23 22:41:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-23 22:41:59,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:59,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:59,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:59,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:59,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:59,968 INFO L124 PetriNetUnfolderBase]: 756/1375 cut-off events. [2023-08-23 22:41:59,968 INFO L125 PetriNetUnfolderBase]: For 83402/83402 co-relation queries the response was YES. [2023-08-23 22:41:59,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 83402/83402 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6896 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2023-08-23 22:41:59,985 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2023-08-23 22:41:59,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2023-08-23 22:41:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-23 22:41:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-23 22:41:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1744 transitions. [2023-08-23 22:41:59,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2023-08-23 22:41:59,989 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1744 transitions. [2023-08-23 22:41:59,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1744 transitions. [2023-08-23 22:41:59,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:59,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1744 transitions. [2023-08-23 22:41:59,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.13333333333333) internal successors, (1744), 30 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:59,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 128.0) internal successors, (3968), 31 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:59,999 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 128.0) internal successors, (3968), 31 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:59,999 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 1744 transitions. [2023-08-23 22:41:59,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2023-08-23 22:42:00,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2023-08-23 22:42:00,209 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2023-08-23 22:42:00,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2023-08-23 22:42:00,210 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2023-08-23 22:42:00,210 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2023-08-23 22:42:00,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:00,210 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:00,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:00,416 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,SelfDestructingSolverStorable9 [2023-08-23 22:42:00,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:00,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1391431136, now seen corresponding path program 8 times [2023-08-23 22:42:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:00,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123704496] [2023-08-23 22:42:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123704496] [2023-08-23 22:42:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123704496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682545040] [2023-08-23 22:42:00,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:42:00,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:00,625 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) [2023-08-23 22:42:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-23 22:42:00,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:42:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:00,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-23 22:42:00,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:00,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682545040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:00,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:00,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-08-23 22:42:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13763780] [2023-08-23 22:42:00,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-23 22:42:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-23 22:42:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2023-08-23 22:42:00,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:00,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 30 states, 30 states have (on average 54.36666666666667) internal successors, (1631), 30 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:00,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:00,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:00,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:02,323 INFO L124 PetriNetUnfolderBase]: 916/1643 cut-off events. [2023-08-23 22:42:02,323 INFO L125 PetriNetUnfolderBase]: For 111678/111678 co-relation queries the response was YES. [2023-08-23 22:42:02,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15915 conditions, 1643 events. 916/1643 cut-off events. For 111678/111678 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7887 event pairs, 18 based on Foata normal form. 44/1687 useless extension candidates. Maximal degree in co-relation 15830. Up to 558 conditions per place. [2023-08-23 22:42:02,346 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 86 selfloop transitions, 216 changer transitions 90/392 dead transitions. [2023-08-23 22:42:02,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 392 transitions, 8350 flow [2023-08-23 22:42:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-23 22:42:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-23 22:42:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2782 transitions. [2023-08-23 22:42:02,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527994791666667 [2023-08-23 22:42:02,351 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2782 transitions. [2023-08-23 22:42:02,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2782 transitions. [2023-08-23 22:42:02,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:02,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2782 transitions. [2023-08-23 22:42:02,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.958333333333336) internal successors, (2782), 48 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 128.0) internal successors, (6272), 49 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,365 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 128.0) internal successors, (6272), 49 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,365 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 48 states and 2782 transitions. [2023-08-23 22:42:02,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 392 transitions, 8350 flow [2023-08-23 22:42:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 392 transitions, 7489 flow, removed 402 selfloop flow, removed 8 redundant places. [2023-08-23 22:42:02,592 INFO L231 Difference]: Finished difference. Result has 247 places, 242 transitions, 4892 flow [2023-08-23 22:42:02,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4892, PETRI_PLACES=247, PETRI_TRANSITIONS=242} [2023-08-23 22:42:02,593 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 229 predicate places. [2023-08-23 22:42:02,593 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 242 transitions, 4892 flow [2023-08-23 22:42:02,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 54.36666666666667) internal successors, (1631), 30 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:02,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:02,594 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:02,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-23 22:42:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:02,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:02,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash 440369608, now seen corresponding path program 9 times [2023-08-23 22:42:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:02,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953488649] [2023-08-23 22:42:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:03,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:03,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953488649] [2023-08-23 22:42:03,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953488649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:03,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221120284] [2023-08-23 22:42:03,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:42:03,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:03,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:03,270 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) [2023-08-23 22:42:03,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-23 22:42:03,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-23 22:42:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:03,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:03,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:03,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221120284] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:03,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:03,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113761359] [2023-08-23 22:42:03,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:03,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:03,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:03,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 242 transitions, 4892 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:03,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:03,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:03,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:04,591 INFO L124 PetriNetUnfolderBase]: 996/1803 cut-off events. [2023-08-23 22:42:04,591 INFO L125 PetriNetUnfolderBase]: For 180876/180876 co-relation queries the response was YES. [2023-08-23 22:42:04,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21146 conditions, 1803 events. 996/1803 cut-off events. For 180876/180876 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8870 event pairs, 302 based on Foata normal form. 8/1811 useless extension candidates. Maximal degree in co-relation 21039. Up to 1201 conditions per place. [2023-08-23 22:42:04,630 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 220 selfloop transitions, 72 changer transitions 47/339 dead transitions. [2023-08-23 22:42:04,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 339 transitions, 8260 flow [2023-08-23 22:42:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-23 22:42:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-23 22:42:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1495 transitions. [2023-08-23 22:42:04,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2023-08-23 22:42:04,633 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1495 transitions. [2023-08-23 22:42:04,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1495 transitions. [2023-08-23 22:42:04,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:04,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1495 transitions. [2023-08-23 22:42:04,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.5) internal successors, (1495), 26 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 128.0) internal successors, (3456), 27 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,642 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 128.0) internal successors, (3456), 27 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:04,642 INFO L175 Difference]: Start difference. First operand has 247 places, 242 transitions, 4892 flow. Second operand 26 states and 1495 transitions. [2023-08-23 22:42:04,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 339 transitions, 8260 flow [2023-08-23 22:42:05,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 339 transitions, 6421 flow, removed 847 selfloop flow, removed 16 redundant places. [2023-08-23 22:42:05,126 INFO L231 Difference]: Finished difference. Result has 268 places, 262 transitions, 4311 flow [2023-08-23 22:42:05,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4311, PETRI_PLACES=268, PETRI_TRANSITIONS=262} [2023-08-23 22:42:05,127 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 250 predicate places. [2023-08-23 22:42:05,127 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 262 transitions, 4311 flow [2023-08-23 22:42:05,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:05,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:05,128 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:05,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:05,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:05,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:05,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:05,329 INFO L85 PathProgramCache]: Analyzing trace with hash -16617380, now seen corresponding path program 10 times [2023-08-23 22:42:05,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:05,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645893567] [2023-08-23 22:42:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:05,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645893567] [2023-08-23 22:42:05,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645893567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595657617] [2023-08-23 22:42:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:42:05,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:05,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:05,757 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) [2023-08-23 22:42:05,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-23 22:42:05,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:42:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:05,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:05,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:05,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:06,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595657617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:06,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842149052] [2023-08-23 22:42:06,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:06,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:06,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:06,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:06,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:06,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 262 transitions, 4311 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:06,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:06,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:06,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:07,276 INFO L124 PetriNetUnfolderBase]: 1124/2059 cut-off events. [2023-08-23 22:42:07,276 INFO L125 PetriNetUnfolderBase]: For 231196/231196 co-relation queries the response was YES. [2023-08-23 22:42:07,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23304 conditions, 2059 events. 1124/2059 cut-off events. For 231196/231196 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10449 event pairs, 106 based on Foata normal form. 8/2067 useless extension candidates. Maximal degree in co-relation 23184. Up to 766 conditions per place. [2023-08-23 22:42:07,308 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 130 selfloop transitions, 202 changer transitions 61/393 dead transitions. [2023-08-23 22:42:07,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 393 transitions, 7835 flow [2023-08-23 22:42:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-23 22:42:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-23 22:42:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1903 transitions. [2023-08-23 22:42:07,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2023-08-23 22:42:07,311 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1903 transitions. [2023-08-23 22:42:07,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1903 transitions. [2023-08-23 22:42:07,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:07,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1903 transitions. [2023-08-23 22:42:07,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.666666666666664) internal successors, (1903), 33 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 128.0) internal successors, (4352), 34 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,320 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 128.0) internal successors, (4352), 34 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,320 INFO L175 Difference]: Start difference. First operand has 268 places, 262 transitions, 4311 flow. Second operand 33 states and 1903 transitions. [2023-08-23 22:42:07,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 393 transitions, 7835 flow [2023-08-23 22:42:07,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 393 transitions, 7646 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-08-23 22:42:07,947 INFO L231 Difference]: Finished difference. Result has 309 places, 295 transitions, 5449 flow [2023-08-23 22:42:07,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5449, PETRI_PLACES=309, PETRI_TRANSITIONS=295} [2023-08-23 22:42:07,948 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 291 predicate places. [2023-08-23 22:42:07,948 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 295 transitions, 5449 flow [2023-08-23 22:42:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:07,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:07,949 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:07,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:08,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-23 22:42:08,155 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:08,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1670387920, now seen corresponding path program 11 times [2023-08-23 22:42:08,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:08,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691129989] [2023-08-23 22:42:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:08,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691129989] [2023-08-23 22:42:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691129989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:08,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322053442] [2023-08-23 22:42:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:42:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:08,558 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) [2023-08-23 22:42:08,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-23 22:42:08,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-23 22:42:08,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:08,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:08,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:08,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:08,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322053442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:08,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:08,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:08,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189356004] [2023-08-23 22:42:08,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:08,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:08,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:08,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:08,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 295 transitions, 5449 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:08,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:08,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:08,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:09,989 INFO L124 PetriNetUnfolderBase]: 1236/2283 cut-off events. [2023-08-23 22:42:09,990 INFO L125 PetriNetUnfolderBase]: For 290058/290058 co-relation queries the response was YES. [2023-08-23 22:42:10,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27579 conditions, 2283 events. 1236/2283 cut-off events. For 290058/290058 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11917 event pairs, 108 based on Foata normal form. 8/2291 useless extension candidates. Maximal degree in co-relation 27443. Up to 878 conditions per place. [2023-08-23 22:42:10,029 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 124 selfloop transitions, 234 changer transitions 59/417 dead transitions. [2023-08-23 22:42:10,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 417 transitions, 9151 flow [2023-08-23 22:42:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-23 22:42:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-23 22:42:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1842 transitions. [2023-08-23 22:42:10,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44970703125 [2023-08-23 22:42:10,033 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1842 transitions. [2023-08-23 22:42:10,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1842 transitions. [2023-08-23 22:42:10,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:10,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1842 transitions. [2023-08-23 22:42:10,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.5625) internal successors, (1842), 32 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:10,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 128.0) internal successors, (4224), 33 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:10,042 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 128.0) internal successors, (4224), 33 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:10,042 INFO L175 Difference]: Start difference. First operand has 309 places, 295 transitions, 5449 flow. Second operand 32 states and 1842 transitions. [2023-08-23 22:42:10,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 417 transitions, 9151 flow [2023-08-23 22:42:10,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 417 transitions, 8642 flow, removed 160 selfloop flow, removed 15 redundant places. [2023-08-23 22:42:10,890 INFO L231 Difference]: Finished difference. Result has 339 places, 324 transitions, 6358 flow [2023-08-23 22:42:10,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6358, PETRI_PLACES=339, PETRI_TRANSITIONS=324} [2023-08-23 22:42:10,891 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 321 predicate places. [2023-08-23 22:42:10,891 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 324 transitions, 6358 flow [2023-08-23 22:42:10,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:10,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:10,892 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:10,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:11,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-23 22:42:11,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:11,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash 421364436, now seen corresponding path program 12 times [2023-08-23 22:42:11,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:11,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251854614] [2023-08-23 22:42:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:11,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:11,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:11,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251854614] [2023-08-23 22:42:11,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251854614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:11,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687964821] [2023-08-23 22:42:11,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:42:11,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:11,480 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) [2023-08-23 22:42:11,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-23 22:42:11,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-23 22:42:11,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:11,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:11,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:11,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:11,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687964821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:11,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:11,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:11,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953570153] [2023-08-23 22:42:11,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:11,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:11,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:11,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:11,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:11,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:11,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 324 transitions, 6358 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:11,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:11,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:11,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:13,130 INFO L124 PetriNetUnfolderBase]: 1340/2491 cut-off events. [2023-08-23 22:42:13,130 INFO L125 PetriNetUnfolderBase]: For 341680/341680 co-relation queries the response was YES. [2023-08-23 22:42:13,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31070 conditions, 2491 events. 1340/2491 cut-off events. For 341680/341680 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13339 event pairs, 88 based on Foata normal form. 8/2499 useless extension candidates. Maximal degree in co-relation 30919. Up to 966 conditions per place. [2023-08-23 22:42:13,168 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 122 selfloop transitions, 268 changer transitions 65/455 dead transitions. [2023-08-23 22:42:13,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 455 transitions, 10283 flow [2023-08-23 22:42:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-23 22:42:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-23 22:42:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2019 transitions. [2023-08-23 22:42:13,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45066964285714284 [2023-08-23 22:42:13,172 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2019 transitions. [2023-08-23 22:42:13,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2019 transitions. [2023-08-23 22:42:13,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:13,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2019 transitions. [2023-08-23 22:42:13,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.68571428571428) internal successors, (2019), 35 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:13,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 128.0) internal successors, (4608), 36 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:13,180 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 128.0) internal successors, (4608), 36 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:13,180 INFO L175 Difference]: Start difference. First operand has 339 places, 324 transitions, 6358 flow. Second operand 35 states and 2019 transitions. [2023-08-23 22:42:13,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 455 transitions, 10283 flow [2023-08-23 22:42:14,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 455 transitions, 9611 flow, removed 199 selfloop flow, removed 16 redundant places. [2023-08-23 22:42:14,410 INFO L231 Difference]: Finished difference. Result has 370 places, 351 transitions, 7231 flow [2023-08-23 22:42:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7231, PETRI_PLACES=370, PETRI_TRANSITIONS=351} [2023-08-23 22:42:14,411 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 352 predicate places. [2023-08-23 22:42:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 351 transitions, 7231 flow [2023-08-23 22:42:14,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:14,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:14,411 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:14,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:14,612 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,SelfDestructingSolverStorable14 [2023-08-23 22:42:14,612 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:14,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash 526462888, now seen corresponding path program 13 times [2023-08-23 22:42:14,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:14,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504163425] [2023-08-23 22:42:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:14,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504163425] [2023-08-23 22:42:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504163425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662436808] [2023-08-23 22:42:14,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-23 22:42:14,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:14,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:14,949 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) [2023-08-23 22:42:14,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-23 22:42:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:15,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:15,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:15,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662436808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:15,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:15,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775361699] [2023-08-23 22:42:15,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:15,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:15,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:15,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 351 transitions, 7231 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:15,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:15,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:15,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:16,634 INFO L124 PetriNetUnfolderBase]: 1428/2667 cut-off events. [2023-08-23 22:42:16,634 INFO L125 PetriNetUnfolderBase]: For 377917/377917 co-relation queries the response was YES. [2023-08-23 22:42:16,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34016 conditions, 2667 events. 1428/2667 cut-off events. For 377917/377917 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14589 event pairs, 86 based on Foata normal form. 8/2675 useless extension candidates. Maximal degree in co-relation 33851. Up to 1046 conditions per place. [2023-08-23 22:42:16,675 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 113 selfloop transitions, 297 changer transitions 63/473 dead transitions. [2023-08-23 22:42:16,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 473 transitions, 11197 flow [2023-08-23 22:42:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-23 22:42:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-23 22:42:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1958 transitions. [2023-08-23 22:42:16,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4499080882352941 [2023-08-23 22:42:16,679 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1958 transitions. [2023-08-23 22:42:16,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1958 transitions. [2023-08-23 22:42:16,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:16,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1958 transitions. [2023-08-23 22:42:16,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.588235294117645) internal successors, (1958), 34 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:16,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 128.0) internal successors, (4480), 35 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:16,688 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 128.0) internal successors, (4480), 35 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:16,688 INFO L175 Difference]: Start difference. First operand has 370 places, 351 transitions, 7231 flow. Second operand 34 states and 1958 transitions. [2023-08-23 22:42:16,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 473 transitions, 11197 flow [2023-08-23 22:42:18,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 473 transitions, 10511 flow, removed 188 selfloop flow, removed 20 redundant places. [2023-08-23 22:42:18,027 INFO L231 Difference]: Finished difference. Result has 395 places, 375 transitions, 8075 flow [2023-08-23 22:42:18,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=6637, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8075, PETRI_PLACES=395, PETRI_TRANSITIONS=375} [2023-08-23 22:42:18,028 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 377 predicate places. [2023-08-23 22:42:18,029 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 375 transitions, 8075 flow [2023-08-23 22:42:18,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:18,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:18,029 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:18,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:18,234 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,SelfDestructingSolverStorable15 [2023-08-23 22:42:18,234 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:18,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2125609052, now seen corresponding path program 14 times [2023-08-23 22:42:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384854981] [2023-08-23 22:42:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:18,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384854981] [2023-08-23 22:42:18,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384854981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:18,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969948092] [2023-08-23 22:42:18,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:42:18,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:18,585 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) [2023-08-23 22:42:18,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-23 22:42:18,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:42:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:18,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:18,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:18,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:19,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969948092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:19,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547542145] [2023-08-23 22:42:19,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:19,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:19,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 375 transitions, 8075 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:19,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:20,401 INFO L124 PetriNetUnfolderBase]: 1508/2827 cut-off events. [2023-08-23 22:42:20,402 INFO L125 PetriNetUnfolderBase]: For 416378/416378 co-relation queries the response was YES. [2023-08-23 22:42:20,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36901 conditions, 2827 events. 1508/2827 cut-off events. For 416378/416378 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 15679 event pairs, 64 based on Foata normal form. 8/2835 useless extension candidates. Maximal degree in co-relation 36723. Up to 1118 conditions per place. [2023-08-23 22:42:20,447 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 105 selfloop transitions, 328 changer transitions 67/500 dead transitions. [2023-08-23 22:42:20,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 500 transitions, 12257 flow [2023-08-23 22:42:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-23 22:42:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-23 22:42:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2074 transitions. [2023-08-23 22:42:20,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500868055555556 [2023-08-23 22:42:20,457 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2074 transitions. [2023-08-23 22:42:20,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2074 transitions. [2023-08-23 22:42:20,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:20,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2074 transitions. [2023-08-23 22:42:20,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.611111111111114) internal successors, (2074), 36 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:20,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 128.0) internal successors, (4736), 37 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:20,470 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 128.0) internal successors, (4736), 37 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:20,470 INFO L175 Difference]: Start difference. First operand has 395 places, 375 transitions, 8075 flow. Second operand 36 states and 2074 transitions. [2023-08-23 22:42:20,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 500 transitions, 12257 flow [2023-08-23 22:42:21,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 500 transitions, 11544 flow, removed 186 selfloop flow, removed 20 redundant places. [2023-08-23 22:42:21,974 INFO L231 Difference]: Finished difference. Result has 420 places, 396 transitions, 8911 flow [2023-08-23 22:42:21,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=7470, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8911, PETRI_PLACES=420, PETRI_TRANSITIONS=396} [2023-08-23 22:42:21,975 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 402 predicate places. [2023-08-23 22:42:21,975 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 396 transitions, 8911 flow [2023-08-23 22:42:21,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:21,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:21,976 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:21,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-23 22:42:22,181 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,SelfDestructingSolverStorable16 [2023-08-23 22:42:22,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:22,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1962810940, now seen corresponding path program 15 times [2023-08-23 22:42:22,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:22,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096603416] [2023-08-23 22:42:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096603416] [2023-08-23 22:42:22,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096603416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:22,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439862405] [2023-08-23 22:42:22,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:42:22,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:22,521 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) [2023-08-23 22:42:22,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-23 22:42:22,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-23 22:42:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:22,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:22,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:22,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:22,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439862405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:22,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:22,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:22,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655064325] [2023-08-23 22:42:22,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:22,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:22,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 396 transitions, 8911 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:22,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:22,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:22,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:24,678 INFO L124 PetriNetUnfolderBase]: 1592/2991 cut-off events. [2023-08-23 22:42:24,678 INFO L125 PetriNetUnfolderBase]: For 447397/447397 co-relation queries the response was YES. [2023-08-23 22:42:24,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39762 conditions, 2991 events. 1592/2991 cut-off events. For 447397/447397 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 16874 event pairs, 50 based on Foata normal form. 8/2999 useless extension candidates. Maximal degree in co-relation 39573. Up to 1194 conditions per place. [2023-08-23 22:42:24,725 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 104 selfloop transitions, 356 changer transitions 73/533 dead transitions. [2023-08-23 22:42:24,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 533 transitions, 13280 flow [2023-08-23 22:42:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-23 22:42:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-23 22:42:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2251 transitions. [2023-08-23 22:42:24,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45092147435897434 [2023-08-23 22:42:24,729 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2251 transitions. [2023-08-23 22:42:24,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2251 transitions. [2023-08-23 22:42:24,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:24,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2251 transitions. [2023-08-23 22:42:24,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 57.717948717948715) internal successors, (2251), 39 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:24,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 128.0) internal successors, (5120), 40 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:24,740 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 128.0) internal successors, (5120), 40 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:24,740 INFO L175 Difference]: Start difference. First operand has 420 places, 396 transitions, 8911 flow. Second operand 39 states and 2251 transitions. [2023-08-23 22:42:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 533 transitions, 13280 flow [2023-08-23 22:42:26,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 533 transitions, 12489 flow, removed 188 selfloop flow, removed 24 redundant places. [2023-08-23 22:42:26,339 INFO L231 Difference]: Finished difference. Result has 443 places, 418 transitions, 9700 flow [2023-08-23 22:42:26,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=8218, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9700, PETRI_PLACES=443, PETRI_TRANSITIONS=418} [2023-08-23 22:42:26,340 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 425 predicate places. [2023-08-23 22:42:26,340 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 418 transitions, 9700 flow [2023-08-23 22:42:26,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:26,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:26,340 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:26,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:26,540 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,SelfDestructingSolverStorable17 [2023-08-23 22:42:26,541 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:26,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:26,541 INFO L85 PathProgramCache]: Analyzing trace with hash -725181256, now seen corresponding path program 16 times [2023-08-23 22:42:26,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:26,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979844846] [2023-08-23 22:42:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:26,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:26,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:26,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979844846] [2023-08-23 22:42:26,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979844846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:26,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926440520] [2023-08-23 22:42:26,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:42:26,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:26,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:26,905 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) [2023-08-23 22:42:26,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-23 22:42:26,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:42:26,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:26,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:26,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:27,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:27,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926440520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:27,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:27,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:27,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965263031] [2023-08-23 22:42:27,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:27,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:27,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:27,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 418 transitions, 9700 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:27,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:27,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:27,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:29,035 INFO L124 PetriNetUnfolderBase]: 1672/3143 cut-off events. [2023-08-23 22:42:29,035 INFO L125 PetriNetUnfolderBase]: For 488865/488865 co-relation queries the response was YES. [2023-08-23 22:42:29,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42524 conditions, 3143 events. 1672/3143 cut-off events. For 488865/488865 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 17986 event pairs, 46 based on Foata normal form. 8/3151 useless extension candidates. Maximal degree in co-relation 42325. Up to 1258 conditions per place. [2023-08-23 22:42:29,079 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 101 selfloop transitions, 382 changer transitions 77/560 dead transitions. [2023-08-23 22:42:29,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 560 transitions, 14305 flow [2023-08-23 22:42:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-23 22:42:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-23 22:42:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2367 transitions. [2023-08-23 22:42:29,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45102896341463417 [2023-08-23 22:42:29,082 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2367 transitions. [2023-08-23 22:42:29,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2367 transitions. [2023-08-23 22:42:29,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:29,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2367 transitions. [2023-08-23 22:42:29,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.73170731707317) internal successors, (2367), 41 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:29,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:29,091 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:29,091 INFO L175 Difference]: Start difference. First operand has 443 places, 418 transitions, 9700 flow. Second operand 41 states and 2367 transitions. [2023-08-23 22:42:29,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 560 transitions, 14305 flow [2023-08-23 22:42:30,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 560 transitions, 13510 flow, removed 188 selfloop flow, removed 26 redundant places. [2023-08-23 22:42:30,629 INFO L231 Difference]: Finished difference. Result has 466 places, 439 transitions, 10493 flow [2023-08-23 22:42:30,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10493, PETRI_PLACES=466, PETRI_TRANSITIONS=439} [2023-08-23 22:42:30,630 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 448 predicate places. [2023-08-23 22:42:30,630 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 439 transitions, 10493 flow [2023-08-23 22:42:30,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:30,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:30,630 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:30,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:30,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:30,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:30,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash -798917360, now seen corresponding path program 17 times [2023-08-23 22:42:30,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164425576] [2023-08-23 22:42:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:30,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164425576] [2023-08-23 22:42:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164425576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756013984] [2023-08-23 22:42:31,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:42:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:31,181 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) [2023-08-23 22:42:31,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-23 22:42:31,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-23 22:42:31,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:31,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:31,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:31,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:31,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756013984] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:31,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:31,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948846625] [2023-08-23 22:42:31,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:31,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:31,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:31,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:31,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:31,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 439 transitions, 10493 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:31,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:31,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:31,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:33,269 INFO L124 PetriNetUnfolderBase]: 1732/3259 cut-off events. [2023-08-23 22:42:33,270 INFO L125 PetriNetUnfolderBase]: For 532752/532752 co-relation queries the response was YES. [2023-08-23 22:42:33,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44984 conditions, 3259 events. 1732/3259 cut-off events. For 532752/532752 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18849 event pairs, 50 based on Foata normal form. 8/3267 useless extension candidates. Maximal degree in co-relation 44775. Up to 1306 conditions per place. [2023-08-23 22:42:33,405 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 98 selfloop transitions, 398 changer transitions 75/571 dead transitions. [2023-08-23 22:42:33,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 571 transitions, 15164 flow [2023-08-23 22:42:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-23 22:42:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-23 22:42:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2306 transitions. [2023-08-23 22:42:33,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450390625 [2023-08-23 22:42:33,415 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2306 transitions. [2023-08-23 22:42:33,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2306 transitions. [2023-08-23 22:42:33,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:33,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2306 transitions. [2023-08-23 22:42:33,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.65) internal successors, (2306), 40 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:33,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 128.0) internal successors, (5248), 41 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:33,422 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 128.0) internal successors, (5248), 41 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:33,422 INFO L175 Difference]: Start difference. First operand has 466 places, 439 transitions, 10493 flow. Second operand 40 states and 2306 transitions. [2023-08-23 22:42:33,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 571 transitions, 15164 flow [2023-08-23 22:42:35,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 571 transitions, 14345 flow, removed 178 selfloop flow, removed 28 redundant places. [2023-08-23 22:42:35,185 INFO L231 Difference]: Finished difference. Result has 484 places, 455 transitions, 11210 flow [2023-08-23 22:42:35,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=9752, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=11210, PETRI_PLACES=484, PETRI_TRANSITIONS=455} [2023-08-23 22:42:35,186 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 466 predicate places. [2023-08-23 22:42:35,186 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 455 transitions, 11210 flow [2023-08-23 22:42:35,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:35,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:35,187 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:35,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:35,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:35,391 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:35,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash 4929716, now seen corresponding path program 18 times [2023-08-23 22:42:35,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:35,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214335519] [2023-08-23 22:42:35,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:35,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:35,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214335519] [2023-08-23 22:42:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214335519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068910248] [2023-08-23 22:42:35,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:42:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:35,719 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) [2023-08-23 22:42:35,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-23 22:42:35,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-23 22:42:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:35,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-23 22:42:35,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:35,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068910248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:35,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:35,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063764362] [2023-08-23 22:42:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:35,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 455 transitions, 11210 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:35,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:35,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:35,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:37,963 INFO L124 PetriNetUnfolderBase]: 1784/3359 cut-off events. [2023-08-23 22:42:37,964 INFO L125 PetriNetUnfolderBase]: For 562232/562232 co-relation queries the response was YES. [2023-08-23 22:42:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47050 conditions, 3359 events. 1784/3359 cut-off events. For 562232/562232 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 19522 event pairs, 44 based on Foata normal form. 8/3367 useless extension candidates. Maximal degree in co-relation 46833. Up to 1346 conditions per place. [2023-08-23 22:42:38,012 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 97 selfloop transitions, 414 changer transitions 77/588 dead transitions. [2023-08-23 22:42:38,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 588 transitions, 16031 flow [2023-08-23 22:42:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-23 22:42:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-23 22:42:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2364 transitions. [2023-08-23 22:42:38,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504573170731707 [2023-08-23 22:42:38,016 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2364 transitions. [2023-08-23 22:42:38,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2364 transitions. [2023-08-23 22:42:38,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:38,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2364 transitions. [2023-08-23 22:42:38,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.65853658536585) internal successors, (2364), 41 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:38,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:38,024 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:38,024 INFO L175 Difference]: Start difference. First operand has 484 places, 455 transitions, 11210 flow. Second operand 41 states and 2364 transitions. [2023-08-23 22:42:38,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 588 transitions, 16031 flow [2023-08-23 22:42:39,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 588 transitions, 15107 flow, removed 180 selfloop flow, removed 31 redundant places. [2023-08-23 22:42:39,989 INFO L231 Difference]: Finished difference. Result has 499 places, 469 transitions, 11838 flow [2023-08-23 22:42:39,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11838, PETRI_PLACES=499, PETRI_TRANSITIONS=469} [2023-08-23 22:42:39,990 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 481 predicate places. [2023-08-23 22:42:39,990 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 469 transitions, 11838 flow [2023-08-23 22:42:39,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:39,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:39,991 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:39,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:40,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:40,191 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:40,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 559042316, now seen corresponding path program 19 times [2023-08-23 22:42:40,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534434646] [2023-08-23 22:42:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:40,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534434646] [2023-08-23 22:42:40,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534434646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:40,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233131163] [2023-08-23 22:42:40,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-23 22:42:40,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:40,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:40,489 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) [2023-08-23 22:42:40,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-23 22:42:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:40,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:40,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:40,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233131163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:40,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:40,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:40,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537914904] [2023-08-23 22:42:40,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:40,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:40,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:40,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:40,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 469 transitions, 11838 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:40,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:40,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:40,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:42,588 INFO L124 PetriNetUnfolderBase]: 1828/3443 cut-off events. [2023-08-23 22:42:42,588 INFO L125 PetriNetUnfolderBase]: For 590492/590492 co-relation queries the response was YES. [2023-08-23 22:42:42,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48788 conditions, 3443 events. 1828/3443 cut-off events. For 590492/590492 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 20179 event pairs, 37 based on Foata normal form. 8/3451 useless extension candidates. Maximal degree in co-relation 48565. Up to 1378 conditions per place. [2023-08-23 22:42:42,639 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 96 selfloop transitions, 428 changer transitions 79/603 dead transitions. [2023-08-23 22:42:42,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 603 transitions, 16771 flow [2023-08-23 22:42:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-23 22:42:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-23 22:42:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2422 transitions. [2023-08-23 22:42:42,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2023-08-23 22:42:42,642 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2422 transitions. [2023-08-23 22:42:42,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2422 transitions. [2023-08-23 22:42:42,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:42,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2422 transitions. [2023-08-23 22:42:42,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.666666666666664) internal successors, (2422), 42 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:42,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 128.0) internal successors, (5504), 43 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:42,649 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 128.0) internal successors, (5504), 43 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:42,649 INFO L175 Difference]: Start difference. First operand has 499 places, 469 transitions, 11838 flow. Second operand 42 states and 2422 transitions. [2023-08-23 22:42:42,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 603 transitions, 16771 flow [2023-08-23 22:42:44,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 603 transitions, 15816 flow, removed 179 selfloop flow, removed 33 redundant places. [2023-08-23 22:42:44,689 INFO L231 Difference]: Finished difference. Result has 512 places, 481 transitions, 12377 flow [2023-08-23 22:42:44,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=12377, PETRI_PLACES=512, PETRI_TRANSITIONS=481} [2023-08-23 22:42:44,689 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 494 predicate places. [2023-08-23 22:42:44,690 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 481 transitions, 12377 flow [2023-08-23 22:42:44,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:44,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:44,690 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:44,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:44,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:44,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:44,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 573341996, now seen corresponding path program 20 times [2023-08-23 22:42:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361024642] [2023-08-23 22:42:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:45,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361024642] [2023-08-23 22:42:45,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361024642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:45,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125688332] [2023-08-23 22:42:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:42:45,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:45,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:45,196 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) [2023-08-23 22:42:45,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-23 22:42:45,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:42:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:45,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:45,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:45,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:45,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125688332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:45,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:45,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173951823] [2023-08-23 22:42:45,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:45,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:45,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:45,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 481 transitions, 12377 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:45,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:45,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:45,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:47,580 INFO L124 PetriNetUnfolderBase]: 1864/3511 cut-off events. [2023-08-23 22:42:47,581 INFO L125 PetriNetUnfolderBase]: For 617476/617476 co-relation queries the response was YES. [2023-08-23 22:42:47,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50391 conditions, 3511 events. 1864/3511 cut-off events. For 617476/617476 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20636 event pairs, 21 based on Foata normal form. 8/3519 useless extension candidates. Maximal degree in co-relation 50163. Up to 1402 conditions per place. [2023-08-23 22:42:47,633 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 99 selfloop transitions, 442 changer transitions 83/624 dead transitions. [2023-08-23 22:42:47,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 624 transitions, 17484 flow [2023-08-23 22:42:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-23 22:42:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-23 22:42:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2599 transitions. [2023-08-23 22:42:47,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121527777777776 [2023-08-23 22:42:47,635 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2599 transitions. [2023-08-23 22:42:47,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2599 transitions. [2023-08-23 22:42:47,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:47,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2599 transitions. [2023-08-23 22:42:47,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.75555555555555) internal successors, (2599), 45 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:47,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:47,641 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:47,641 INFO L175 Difference]: Start difference. First operand has 512 places, 481 transitions, 12377 flow. Second operand 45 states and 2599 transitions. [2023-08-23 22:42:47,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 624 transitions, 17484 flow [2023-08-23 22:42:49,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 624 transitions, 16467 flow, removed 185 selfloop flow, removed 35 redundant places. [2023-08-23 22:42:49,660 INFO L231 Difference]: Finished difference. Result has 525 places, 491 transitions, 12842 flow [2023-08-23 22:42:49,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=12842, PETRI_PLACES=525, PETRI_TRANSITIONS=491} [2023-08-23 22:42:49,661 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 507 predicate places. [2023-08-23 22:42:49,661 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 491 transitions, 12842 flow [2023-08-23 22:42:49,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:49,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:49,662 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:49,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-23 22:42:49,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:49,867 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:49,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:49,867 INFO L85 PathProgramCache]: Analyzing trace with hash 627162112, now seen corresponding path program 21 times [2023-08-23 22:42:49,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457659213] [2023-08-23 22:42:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:49,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457659213] [2023-08-23 22:42:50,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457659213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770937230] [2023-08-23 22:42:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:42:50,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:50,156 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) [2023-08-23 22:42:50,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-23 22:42:50,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-23 22:42:50,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:50,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-23 22:42:50,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:50,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:50,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770937230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:50,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:50,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-23 22:42:50,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759401491] [2023-08-23 22:42:50,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:50,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-23 22:42:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-23 22:42:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-08-23 22:42:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:50,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 491 transitions, 12842 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:50,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:50,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:50,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:52,447 INFO L124 PetriNetUnfolderBase]: 1908/3591 cut-off events. [2023-08-23 22:42:52,448 INFO L125 PetriNetUnfolderBase]: For 649382/649382 co-relation queries the response was YES. [2023-08-23 22:42:52,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52545 conditions, 3591 events. 1908/3591 cut-off events. For 649382/649382 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 21160 event pairs, 23 based on Foata normal form. 8/3599 useless extension candidates. Maximal degree in co-relation 52313. Up to 1430 conditions per place. [2023-08-23 22:42:52,507 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 103 selfloop transitions, 450 changer transitions 75/628 dead transitions. [2023-08-23 22:42:52,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 628 transitions, 18286 flow [2023-08-23 22:42:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-23 22:42:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-23 22:42:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2539 transitions. [2023-08-23 22:42:52,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45081676136363635 [2023-08-23 22:42:52,511 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2539 transitions. [2023-08-23 22:42:52,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2539 transitions. [2023-08-23 22:42:52,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:52,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2539 transitions. [2023-08-23 22:42:52,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.70454545454545) internal successors, (2539), 44 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:52,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 128.0) internal successors, (5760), 45 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:52,520 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 128.0) internal successors, (5760), 45 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:52,520 INFO L175 Difference]: Start difference. First operand has 525 places, 491 transitions, 12842 flow. Second operand 44 states and 2539 transitions. [2023-08-23 22:42:52,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 628 transitions, 18286 flow [2023-08-23 22:42:55,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 628 transitions, 17227 flow, removed 177 selfloop flow, removed 39 redundant places. [2023-08-23 22:42:55,082 INFO L231 Difference]: Finished difference. Result has 533 places, 499 transitions, 13397 flow [2023-08-23 22:42:55,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=11861, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13397, PETRI_PLACES=533, PETRI_TRANSITIONS=499} [2023-08-23 22:42:55,083 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 515 predicate places. [2023-08-23 22:42:55,084 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 499 transitions, 13397 flow [2023-08-23 22:42:55,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:55,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:42:55,084 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:42:55,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-23 22:42:55,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:55,289 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:42:55,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:42:55,290 INFO L85 PathProgramCache]: Analyzing trace with hash 573933476, now seen corresponding path program 22 times [2023-08-23 22:42:55,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:42:55,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78148360] [2023-08-23 22:42:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:42:55,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:42:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:42:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:55,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:42:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78148360] [2023-08-23 22:42:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78148360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:42:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436586781] [2023-08-23 22:42:55,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:42:55,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:42:55,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:42:55,592 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) [2023-08-23 22:42:55,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-23 22:42:55,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:42:55,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:42:55,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-23 22:42:55,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:42:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:55,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:42:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:42:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436586781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:42:55,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:42:55,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-23 22:42:55,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105112554] [2023-08-23 22:42:55,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:42:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:42:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:42:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:42:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:42:55,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:42:55,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 499 transitions, 13397 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:55,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:42:55,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:42:55,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:42:57,996 INFO L124 PetriNetUnfolderBase]: 1900/3579 cut-off events. [2023-08-23 22:42:57,996 INFO L125 PetriNetUnfolderBase]: For 693255/693255 co-relation queries the response was YES. [2023-08-23 22:42:58,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53277 conditions, 3579 events. 1900/3579 cut-off events. For 693255/693255 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21149 event pairs, 21 based on Foata normal form. 8/3587 useless extension candidates. Maximal degree in co-relation 53041. Up to 1418 conditions per place. [2023-08-23 22:42:58,055 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 98 selfloop transitions, 453 changer transitions 84/635 dead transitions. [2023-08-23 22:42:58,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 635 transitions, 18495 flow [2023-08-23 22:42:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-23 22:42:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-23 22:42:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2600 transitions. [2023-08-23 22:42:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-08-23 22:42:58,059 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2600 transitions. [2023-08-23 22:42:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2600 transitions. [2023-08-23 22:42:58,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:42:58,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2600 transitions. [2023-08-23 22:42:58,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.77777777777778) internal successors, (2600), 45 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:58,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:58,067 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:42:58,067 INFO L175 Difference]: Start difference. First operand has 533 places, 499 transitions, 13397 flow. Second operand 45 states and 2600 transitions. [2023-08-23 22:42:58,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 635 transitions, 18495 flow [2023-08-23 22:43:00,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 635 transitions, 17225 flow, removed 240 selfloop flow, removed 40 redundant places. [2023-08-23 22:43:00,647 INFO L231 Difference]: Finished difference. Result has 539 places, 501 transitions, 13307 flow [2023-08-23 22:43:00,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=12169, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13307, PETRI_PLACES=539, PETRI_TRANSITIONS=501} [2023-08-23 22:43:00,648 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 521 predicate places. [2023-08-23 22:43:00,648 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 501 transitions, 13307 flow [2023-08-23 22:43:00,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:00,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:43:00,649 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:43:00,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-23 22:43:00,849 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,SelfDestructingSolverStorable24 [2023-08-23 22:43:00,849 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:43:00,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:43:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2032330621, now seen corresponding path program 23 times [2023-08-23 22:43:00,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:43:00,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998769489] [2023-08-23 22:43:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:43:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:43:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:43:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:43:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998769489] [2023-08-23 22:43:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998769489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:43:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101538173] [2023-08-23 22:43:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:43:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:43:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:43:00,977 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) [2023-08-23 22:43:00,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-23 22:43:01,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-08-23 22:43:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:43:01,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-23 22:43:01,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:43:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:43:01,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-23 22:43:01,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101538173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:43:01,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-23 22:43:01,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2023-08-23 22:43:01,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217997776] [2023-08-23 22:43:01,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:43:01,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-23 22:43:01,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:43:01,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-23 22:43:01,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-23 22:43:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 128 [2023-08-23 22:43:01,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 501 transitions, 13307 flow. Second operand has 13 states, 13 states have (on average 58.23076923076923) internal successors, (757), 13 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:01,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:43:01,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 128 [2023-08-23 22:43:01,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:43:05,311 INFO L124 PetriNetUnfolderBase]: 7702/12394 cut-off events. [2023-08-23 22:43:05,311 INFO L125 PetriNetUnfolderBase]: For 2345141/2345141 co-relation queries the response was YES. [2023-08-23 22:43:05,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160948 conditions, 12394 events. 7702/12394 cut-off events. For 2345141/2345141 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 78159 event pairs, 146 based on Foata normal form. 777/13171 useless extension candidates. Maximal degree in co-relation 160711. Up to 4801 conditions per place. [2023-08-23 22:43:05,504 INFO L140 encePairwiseOnDemand]: 125/128 looper letters, 0 selfloop transitions, 0 changer transitions 2567/2567 dead transitions. [2023-08-23 22:43:05,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 2567 transitions, 63155 flow [2023-08-23 22:43:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-23 22:43:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-23 22:43:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 825 transitions. [2023-08-23 22:43:05,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957932692307692 [2023-08-23 22:43:05,505 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 825 transitions. [2023-08-23 22:43:05,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 825 transitions. [2023-08-23 22:43:05,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:43:05,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 825 transitions. [2023-08-23 22:43:05,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.46153846153846) internal successors, (825), 13 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 128.0) internal successors, (1792), 14 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,508 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 128.0) internal successors, (1792), 14 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:05,508 INFO L175 Difference]: Start difference. First operand has 539 places, 501 transitions, 13307 flow. Second operand 13 states and 825 transitions. [2023-08-23 22:43:05,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 2567 transitions, 63155 flow [2023-08-23 22:43:10,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 2567 transitions, 56482 flow, removed 229 selfloop flow, removed 73 redundant places. [2023-08-23 22:43:10,209 INFO L231 Difference]: Finished difference. Result has 477 places, 0 transitions, 0 flow [2023-08-23 22:43:10,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=10533, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=477, PETRI_TRANSITIONS=0} [2023-08-23 22:43:10,209 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 459 predicate places. [2023-08-23 22:43:10,209 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 0 transitions, 0 flow [2023-08-23 22:43:10,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.23076923076923) internal successors, (757), 13 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:43:10,211 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-23 22:43:10,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-23 22:43:10,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-23 22:43:10,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-23 22:43:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-23 22:43:10,413 INFO L445 BasicCegarLoop]: Path program histogram: [23, 2, 1] [2023-08-23 22:43:10,415 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:43:10,416 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:43:10,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:43:10 BasicIcfg [2023-08-23 22:43:10,417 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:43:10,418 INFO L158 Benchmark]: Toolchain (without parser) took 80333.92ms. Allocated memory was 396.4MB in the beginning and 7.6GB in the end (delta: 7.2GB). Free memory was 371.4MB in the beginning and 5.6GB in the end (delta: -5.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-08-23 22:43:10,418 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 396.4MB. Free memory is still 372.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:43:10,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.90ms. Allocated memory is still 396.4MB. Free memory was 371.4MB in the beginning and 351.6MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-23 22:43:10,418 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.54ms. Allocated memory is still 396.4MB. Free memory was 351.6MB in the beginning and 349.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:10,418 INFO L158 Benchmark]: Boogie Preprocessor took 42.30ms. Allocated memory is still 396.4MB. Free memory was 349.9MB in the beginning and 348.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:43:10,418 INFO L158 Benchmark]: RCFGBuilder took 337.11ms. Allocated memory is still 396.4MB. Free memory was 348.3MB in the beginning and 335.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-23 22:43:10,418 INFO L158 Benchmark]: TraceAbstraction took 79510.41ms. Allocated memory was 396.4MB in the beginning and 7.6GB in the end (delta: 7.2GB). Free memory was 334.8MB in the beginning and 5.6GB in the end (delta: -5.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-08-23 22:43:10,420 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 396.4MB. Free memory is still 372.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 395.90ms. Allocated memory is still 396.4MB. Free memory was 371.4MB in the beginning and 351.6MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.54ms. Allocated memory is still 396.4MB. Free memory was 351.6MB in the beginning and 349.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.30ms. Allocated memory is still 396.4MB. Free memory was 349.9MB in the beginning and 348.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 337.11ms. Allocated memory is still 396.4MB. Free memory was 348.3MB in the beginning and 335.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 79510.41ms. Allocated memory was 396.4MB in the beginning and 7.6GB in the end (delta: 7.2GB). Free memory was 334.8MB in the beginning and 5.6GB in the end (delta: -5.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 68 PlacesBefore, 18 PlacesAfterwards, 66 TransitionsBefore, 14 TransitionsAfterwards, 1200 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 60 TotalNumberOfCompositions, 1095 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 977, independent: 951, independent conditional: 0, independent unconditional: 951, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 646, independent: 636, independent conditional: 0, independent unconditional: 636, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 977, independent: 315, independent conditional: 0, independent unconditional: 315, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 646, unknown conditional: 0, unknown unconditional: 646] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 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: 79.4s, OverallIterations: 26, TraceHistogramMax: 11, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 59.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8110 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8110 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 859 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5685 IncrementalHoareTripleChecker+Invalid, 6544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 859 mSolverCounterUnsat, 0 mSDtfsCounter, 5685 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1941 GetRequests, 618 SyntacticMatches, 274 SemanticMatches, 1049 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16965 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13397occurred in iteration=24, InterpolantAutomatonStates: 735, 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.4s InterpolantComputationTime, 1060 NumberOfCodeBlocks, 1060 NumberOfCodeBlocksAsserted, 134 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 6273 SizeOfPredicates, 316 NumberOfNonLiveVariables, 4015 ConjunctsInSsa, 455 ConjunctsInUnsatCore, 67 InterpolantComputations, 6 PerfectInterpolantSequences, 202/4163 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-23 22:43:10,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...