/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:06:28,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:06:28,427 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 [2023-08-24 15:06:28,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:06:28,433 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:06:28,460 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:06:28,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:06:28,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:06:28,462 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:06:28,462 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:06:28,462 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:06:28,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:06:28,463 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:06:28,463 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:06:28,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:06:28,464 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:06:28,464 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:06:28,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:06:28,465 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:06:28,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:06:28,467 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:06:28,468 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:06:28,468 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:06:28,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:06:28,469 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:06:28,469 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:06:28,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:06:28,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:06:28,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:06:28,470 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:06:28,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:06:28,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:06:28,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:06:28,471 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:06:28,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:06:28,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:06:28,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:06:28,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:06:28,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:06:28,808 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:06:28,809 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:06:28,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-24 15:06:30,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:06:30,312 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:06:30,313 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-08-24 15:06:30,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b62a6a2b4/0b57ed7a8b4343bfba73b79d361f8524/FLAGf15e22312 [2023-08-24 15:06:30,338 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b62a6a2b4/0b57ed7a8b4343bfba73b79d361f8524 [2023-08-24 15:06:30,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:06:30,342 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:06:30,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:06:30,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:06:30,345 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:06:30,346 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5534e032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30, skipping insertion in model container [2023-08-24 15:06:30,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,372 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:06:30,523 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2023-08-24 15:06:30,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:06:30,537 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:06:30,565 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2023-08-24 15:06:30,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:06:30,579 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:06:30,579 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:06:30,586 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:06:30,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30 WrapperNode [2023-08-24 15:06:30,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:06:30,588 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:06:30,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:06:30,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:06:30,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,601 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,630 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 202 [2023-08-24 15:06:30,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:06:30,631 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:06:30,631 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:06:30,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:06:30,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,652 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,653 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:06:30,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:06:30,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:06:30,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:06:30,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (1/1) ... [2023-08-24 15:06:30,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:06:30,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:30,686 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) [2023-08-24 15:06:30,704 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 [2023-08-24 15:06:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:06:30,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:06:30,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:06:30,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 15:06:30,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:06:30,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:06:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:06:30,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:06:30,727 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 15:06:30,811 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:06:30,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:06:31,063 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:06:31,195 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:06:31,195 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 15:06:31,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:06:31 BoogieIcfgContainer [2023-08-24 15:06:31,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:06:31,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:06:31,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:06:31,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:06:31,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:06:30" (1/3) ... [2023-08-24 15:06:31,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfdb08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:06:31, skipping insertion in model container [2023-08-24 15:06:31,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:06:30" (2/3) ... [2023-08-24 15:06:31,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfdb08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:06:31, skipping insertion in model container [2023-08-24 15:06:31,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:06:31" (3/3) ... [2023-08-24 15:06:31,219 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-08-24 15:06:31,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:06:31,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:06:31,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:06:31,285 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 15:06:31,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 159 transitions, 334 flow [2023-08-24 15:06:31,394 INFO L124 PetriNetUnfolderBase]: 13/157 cut-off events. [2023-08-24 15:06:31,394 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:06:31,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 13/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-24 15:06:31,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 159 transitions, 334 flow [2023-08-24 15:06:31,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 149 transitions, 310 flow [2023-08-24 15:06:31,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:06:31,422 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 149 transitions, 310 flow [2023-08-24 15:06:31,425 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 149 transitions, 310 flow [2023-08-24 15:06:31,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 149 transitions, 310 flow [2023-08-24 15:06:31,451 INFO L124 PetriNetUnfolderBase]: 13/149 cut-off events. [2023-08-24 15:06:31,452 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:06:31,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 13/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 90 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 123. Up to 2 conditions per place. [2023-08-24 15:06:31,453 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 15:06:36,083 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-08-24 15:06:36,083 INFO L136 LiptonReduction]: Total number of compositions: 149 [2023-08-24 15:06:36,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:06:36,102 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;@6f01d2c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:06:36,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 15:06:36,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:06:36,108 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2023-08-24 15:06:36,108 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:06:36,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:36,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:36,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:36,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1609564256, now seen corresponding path program 1 times [2023-08-24 15:06:36,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:36,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734214768] [2023-08-24 15:06:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734214768] [2023-08-24 15:06:36,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734214768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:36,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:36,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 15:06:36,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634009042] [2023-08-24 15:06:36,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:36,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:06:36,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:06:36,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:06:36,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 308 [2023-08-24 15:06:36,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:36,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:36,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 308 [2023-08-24 15:06:36,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:36,639 INFO L124 PetriNetUnfolderBase]: 67/118 cut-off events. [2023-08-24 15:06:36,639 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 15:06:36,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-24 15:06:36,643 INFO L140 encePairwiseOnDemand]: 304/308 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-08-24 15:06:36,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-08-24 15:06:36,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:06:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:06:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-24 15:06:36,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2023-08-24 15:06:36,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-24 15:06:36,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-24 15:06:36,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:36,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-24 15:06:36,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:36,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:36,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:36,683 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 451 transitions. [2023-08-24 15:06:36,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-08-24 15:06:36,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 15:06:36,688 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-08-24 15:06:36,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-08-24 15:06:36,692 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-08-24 15:06:36,693 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-08-24 15:06:36,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:36,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:36,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:36,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:06:36,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:36,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1078240598, now seen corresponding path program 1 times [2023-08-24 15:06:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:36,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825982845] [2023-08-24 15:06:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:36,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:36,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:36,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825982845] [2023-08-24 15:06:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825982845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:36,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:36,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:36,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050268943] [2023-08-24 15:06:36,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:36,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:36,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:36,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:36,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:36,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:36,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:36,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:37,013 INFO L124 PetriNetUnfolderBase]: 95/175 cut-off events. [2023-08-24 15:06:37,013 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-24 15:06:37,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 175 events. 95/175 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 536 event pairs, 26 based on Foata normal form. 4/177 useless extension candidates. Maximal degree in co-relation 136. Up to 88 conditions per place. [2023-08-24 15:06:37,016 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 34 selfloop transitions, 4 changer transitions 7/45 dead transitions. [2023-08-24 15:06:37,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 45 transitions, 218 flow [2023-08-24 15:06:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 687 transitions. [2023-08-24 15:06:37,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461038961038961 [2023-08-24 15:06:37,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 687 transitions. [2023-08-24 15:06:37,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 687 transitions. [2023-08-24 15:06:37,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:37,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 687 transitions. [2023-08-24 15:06:37,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,026 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 687 transitions. [2023-08-24 15:06:37,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 45 transitions, 218 flow [2023-08-24 15:06:37,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 45 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:06:37,028 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 87 flow [2023-08-24 15:06:37,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 15:06:37,029 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-08-24 15:06:37,029 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 87 flow [2023-08-24 15:06:37,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:37,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:37,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 15:06:37,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:37,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2138165292, now seen corresponding path program 2 times [2023-08-24 15:06:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:37,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874327571] [2023-08-24 15:06:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:37,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874327571] [2023-08-24 15:06:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874327571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060206370] [2023-08-24 15:06:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:06:37,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:37,149 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) [2023-08-24 15:06:37,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 15:06:37,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:06:37,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:37,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 15:06:37,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:37,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:37,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060206370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:37,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:37,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 15:06:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081229966] [2023-08-24 15:06:37,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:37,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 15:06:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 15:06:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 15:06:37,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:37,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 87 flow. Second operand has 8 states, 8 states have (on average 131.75) internal successors, (1054), 8 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:37,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:37,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:37,508 INFO L124 PetriNetUnfolderBase]: 110/204 cut-off events. [2023-08-24 15:06:37,508 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-24 15:06:37,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 204 events. 110/204 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 614 event pairs, 25 based on Foata normal form. 4/206 useless extension candidates. Maximal degree in co-relation 277. Up to 82 conditions per place. [2023-08-24 15:06:37,514 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 45 selfloop transitions, 10 changer transitions 1/56 dead transitions. [2023-08-24 15:06:37,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 56 transitions, 338 flow [2023-08-24 15:06:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:06:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:06:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2023-08-24 15:06:37,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-24 15:06:37,517 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2023-08-24 15:06:37,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2023-08-24 15:06:37,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:37,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2023-08-24 15:06:37,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,525 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 308.0) internal successors, (2464), 8 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,526 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 87 flow. Second operand 7 states and 952 transitions. [2023-08-24 15:06:37,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 56 transitions, 338 flow [2023-08-24 15:06:37,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 56 transitions, 308 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:37,530 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 152 flow [2023-08-24 15:06:37,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-24 15:06:37,531 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-08-24 15:06:37,532 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 152 flow [2023-08-24 15:06:37,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 131.75) internal successors, (1054), 8 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:37,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:37,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:37,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 15:06:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:37,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:37,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1147044196, now seen corresponding path program 1 times [2023-08-24 15:06:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:37,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110328609] [2023-08-24 15:06:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:37,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:37,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110328609] [2023-08-24 15:06:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110328609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353140246] [2023-08-24 15:06:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:37,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:37,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:37,818 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) [2023-08-24 15:06:37,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 15:06:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:37,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:06:37,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:06:37,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 15:06:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353140246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:37,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 15:06:37,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-08-24 15:06:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170188197] [2023-08-24 15:06:37,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:37,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:06:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:37,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:06:37,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:06:37,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 308 [2023-08-24 15:06:37,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 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) [2023-08-24 15:06:37,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:37,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 308 [2023-08-24 15:06:37,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:38,034 INFO L124 PetriNetUnfolderBase]: 98/205 cut-off events. [2023-08-24 15:06:38,034 INFO L125 PetriNetUnfolderBase]: For 469/483 co-relation queries the response was YES. [2023-08-24 15:06:38,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 205 events. 98/205 cut-off events. For 469/483 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 770 event pairs, 60 based on Foata normal form. 24/216 useless extension candidates. Maximal degree in co-relation 400. Up to 161 conditions per place. [2023-08-24 15:06:38,036 INFO L140 encePairwiseOnDemand]: 301/308 looper letters, 25 selfloop transitions, 2 changer transitions 14/45 dead transitions. [2023-08-24 15:06:38,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 279 flow [2023-08-24 15:06:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2023-08-24 15:06:38,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922077922077922 [2023-08-24 15:06:38,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2023-08-24 15:06:38,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2023-08-24 15:06:38,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:38,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2023-08-24 15:06:38,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,044 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,044 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 152 flow. Second operand 5 states and 604 transitions. [2023-08-24 15:06:38,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 279 flow [2023-08-24 15:06:38,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 270 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 15:06:38,047 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 164 flow [2023-08-24 15:06:38,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-24 15:06:38,048 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-08-24 15:06:38,048 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 164 flow [2023-08-24 15:06:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 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) [2023-08-24 15:06:38,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:38,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:38,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:38,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-24 15:06:38,255 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:38,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789985, now seen corresponding path program 1 times [2023-08-24 15:06:38,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:38,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195342975] [2023-08-24 15:06:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:38,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195342975] [2023-08-24 15:06:38,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195342975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:38,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735339577] [2023-08-24 15:06:38,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:38,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:38,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:38,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:38,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:38,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:38,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:38,449 INFO L124 PetriNetUnfolderBase]: 118/219 cut-off events. [2023-08-24 15:06:38,449 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2023-08-24 15:06:38,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 219 events. 118/219 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 27 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 757. Up to 98 conditions per place. [2023-08-24 15:06:38,451 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 46 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2023-08-24 15:06:38,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 377 flow [2023-08-24 15:06:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2023-08-24 15:06:38,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474025974025974 [2023-08-24 15:06:38,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2023-08-24 15:06:38,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2023-08-24 15:06:38,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:38,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2023-08-24 15:06:38,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,459 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 164 flow. Second operand 5 states and 689 transitions. [2023-08-24 15:06:38,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 377 flow [2023-08-24 15:06:38,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 363 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-24 15:06:38,463 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 198 flow [2023-08-24 15:06:38,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-24 15:06:38,464 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2023-08-24 15:06:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 198 flow [2023-08-24 15:06:38,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:38,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:38,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 15:06:38,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:38,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash -462385135, now seen corresponding path program 1 times [2023-08-24 15:06:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:38,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123883415] [2023-08-24 15:06:38,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:38,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:38,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123883415] [2023-08-24 15:06:38,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123883415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:38,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:38,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:38,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082492113] [2023-08-24 15:06:38,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:38,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:38,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:38,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:38,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:38,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:38,630 INFO L124 PetriNetUnfolderBase]: 128/235 cut-off events. [2023-08-24 15:06:38,631 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2023-08-24 15:06:38,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 235 events. 128/235 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 744 event pairs, 43 based on Foata normal form. 4/237 useless extension candidates. Maximal degree in co-relation 883. Up to 191 conditions per place. [2023-08-24 15:06:38,633 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 35 selfloop transitions, 10 changer transitions 5/50 dead transitions. [2023-08-24 15:06:38,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 390 flow [2023-08-24 15:06:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-08-24 15:06:38,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-24 15:06:38,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-08-24 15:06:38,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-08-24 15:06:38,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:38,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-08-24 15:06:38,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,640 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,640 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 198 flow. Second operand 5 states and 682 transitions. [2023-08-24 15:06:38,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 390 flow [2023-08-24 15:06:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 368 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:38,644 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 248 flow [2023-08-24 15:06:38,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2023-08-24 15:06:38,644 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2023-08-24 15:06:38,645 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 248 flow [2023-08-24 15:06:38,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:38,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:38,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 15:06:38,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:38,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1862998627, now seen corresponding path program 2 times [2023-08-24 15:06:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:38,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843117929] [2023-08-24 15:06:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:38,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843117929] [2023-08-24 15:06:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843117929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:38,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:38,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:38,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170172080] [2023-08-24 15:06:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:38,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:38,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:38,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:38,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:38,783 INFO L124 PetriNetUnfolderBase]: 124/229 cut-off events. [2023-08-24 15:06:38,783 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2023-08-24 15:06:38,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 229 events. 124/229 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 731 event pairs, 41 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 953. Up to 189 conditions per place. [2023-08-24 15:06:38,785 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 33 selfloop transitions, 14 changer transitions 3/50 dead transitions. [2023-08-24 15:06:38,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 432 flow [2023-08-24 15:06:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 680 transitions. [2023-08-24 15:06:38,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-24 15:06:38,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 680 transitions. [2023-08-24 15:06:38,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 680 transitions. [2023-08-24 15:06:38,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:38,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 680 transitions. [2023-08-24 15:06:38,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,793 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,793 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 248 flow. Second operand 5 states and 680 transitions. [2023-08-24 15:06:38,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 432 flow [2023-08-24 15:06:38,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 404 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:38,797 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 312 flow [2023-08-24 15:06:38,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-08-24 15:06:38,797 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 27 predicate places. [2023-08-24 15:06:38,797 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 312 flow [2023-08-24 15:06:38,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:38,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:38,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 15:06:38,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:38,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash 54138243, now seen corresponding path program 3 times [2023-08-24 15:06:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:38,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553437342] [2023-08-24 15:06:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:38,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553437342] [2023-08-24 15:06:38,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553437342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:38,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:38,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:38,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977501445] [2023-08-24 15:06:38,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:38,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:38,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:38,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:38,943 INFO L124 PetriNetUnfolderBase]: 122/227 cut-off events. [2023-08-24 15:06:38,943 INFO L125 PetriNetUnfolderBase]: For 765/765 co-relation queries the response was YES. [2023-08-24 15:06:38,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 227 events. 122/227 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 715 event pairs, 36 based on Foata normal form. 2/227 useless extension candidates. Maximal degree in co-relation 993. Up to 149 conditions per place. [2023-08-24 15:06:38,945 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 44 selfloop transitions, 10 changer transitions 4/58 dead transitions. [2023-08-24 15:06:38,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 525 flow [2023-08-24 15:06:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 683 transitions. [2023-08-24 15:06:38,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435064935064935 [2023-08-24 15:06:38,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 683 transitions. [2023-08-24 15:06:38,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 683 transitions. [2023-08-24 15:06:38,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:38,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 683 transitions. [2023-08-24 15:06:38,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,953 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 312 flow. Second operand 5 states and 683 transitions. [2023-08-24 15:06:38,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 525 flow [2023-08-24 15:06:38,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 481 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:38,957 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 304 flow [2023-08-24 15:06:38,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-24 15:06:38,958 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-08-24 15:06:38,958 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 304 flow [2023-08-24 15:06:38,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:38,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:38,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 15:06:38,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:38,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash -30557945, now seen corresponding path program 2 times [2023-08-24 15:06:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:38,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934648562] [2023-08-24 15:06:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:39,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:39,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934648562] [2023-08-24 15:06:39,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934648562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:39,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:39,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:39,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296960655] [2023-08-24 15:06:39,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:39,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:39,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:39,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:39,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:39,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:39,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:39,117 INFO L124 PetriNetUnfolderBase]: 125/232 cut-off events. [2023-08-24 15:06:39,117 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2023-08-24 15:06:39,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1053 conditions, 232 events. 125/232 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 738 event pairs, 49 based on Foata normal form. 4/234 useless extension candidates. Maximal degree in co-relation 1021. Up to 191 conditions per place. [2023-08-24 15:06:39,119 INFO L140 encePairwiseOnDemand]: 303/308 looper letters, 36 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2023-08-24 15:06:39,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 452 flow [2023-08-24 15:06:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-24 15:06:39,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422077922077922 [2023-08-24 15:06:39,122 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-24 15:06:39,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-24 15:06:39,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:39,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-24 15:06:39,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,127 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,127 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 304 flow. Second operand 5 states and 681 transitions. [2023-08-24 15:06:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 452 flow [2023-08-24 15:06:39,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 430 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 15:06:39,131 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 323 flow [2023-08-24 15:06:39,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-24 15:06:39,132 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 30 predicate places. [2023-08-24 15:06:39,132 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 323 flow [2023-08-24 15:06:39,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:39,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:39,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 15:06:39,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:39,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:39,133 INFO L85 PathProgramCache]: Analyzing trace with hash 177958731, now seen corresponding path program 4 times [2023-08-24 15:06:39,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:39,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884636964] [2023-08-24 15:06:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:39,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:39,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884636964] [2023-08-24 15:06:39,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884636964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:39,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372028268] [2023-08-24 15:06:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:06:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:39,198 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) [2023-08-24 15:06:39,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 15:06:39,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:06:39,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:39,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 15:06:39,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:39,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:39,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372028268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:39,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:39,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 15:06:39,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166866669] [2023-08-24 15:06:39,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 15:06:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 15:06:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 15:06:39,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:39,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 323 flow. Second operand has 10 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:39,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:39,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:39,480 INFO L124 PetriNetUnfolderBase]: 141/260 cut-off events. [2023-08-24 15:06:39,480 INFO L125 PetriNetUnfolderBase]: For 861/861 co-relation queries the response was YES. [2023-08-24 15:06:39,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 260 events. 141/260 cut-off events. For 861/861 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 872 event pairs, 29 based on Foata normal form. 6/264 useless extension candidates. Maximal degree in co-relation 1143. Up to 143 conditions per place. [2023-08-24 15:06:39,482 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 50 selfloop transitions, 26 changer transitions 0/76 dead transitions. [2023-08-24 15:06:39,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 645 flow [2023-08-24 15:06:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:06:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:06:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1349 transitions. [2023-08-24 15:06:39,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437987012987013 [2023-08-24 15:06:39,486 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1349 transitions. [2023-08-24 15:06:39,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1349 transitions. [2023-08-24 15:06:39,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:39,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1349 transitions. [2023-08-24 15:06:39,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 134.9) internal successors, (1349), 10 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,494 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,494 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 323 flow. Second operand 10 states and 1349 transitions. [2023-08-24 15:06:39,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 645 flow [2023-08-24 15:06:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 611 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 15:06:39,498 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 453 flow [2023-08-24 15:06:39,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=453, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-08-24 15:06:39,499 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2023-08-24 15:06:39,499 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 453 flow [2023-08-24 15:06:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:39,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:39,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:39,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:39,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1643180945, now seen corresponding path program 3 times [2023-08-24 15:06:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587091058] [2023-08-24 15:06:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:39,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:39,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587091058] [2023-08-24 15:06:39,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587091058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:39,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:39,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330864536] [2023-08-24 15:06:39,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:39,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:39,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:39,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:39,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:39,858 INFO L124 PetriNetUnfolderBase]: 137/256 cut-off events. [2023-08-24 15:06:39,858 INFO L125 PetriNetUnfolderBase]: For 1177/1177 co-relation queries the response was YES. [2023-08-24 15:06:39,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 256 events. 137/256 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 875 event pairs, 38 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 1235. Up to 210 conditions per place. [2023-08-24 15:06:39,860 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 43 selfloop transitions, 14 changer transitions 5/62 dead transitions. [2023-08-24 15:06:39,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 620 flow [2023-08-24 15:06:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-24 15:06:39,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422077922077922 [2023-08-24 15:06:39,863 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-24 15:06:39,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-24 15:06:39,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:39,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-24 15:06:39,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,867 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,867 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 453 flow. Second operand 5 states and 681 transitions. [2023-08-24 15:06:39,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 620 flow [2023-08-24 15:06:39,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 585 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:39,873 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 442 flow [2023-08-24 15:06:39,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=442, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-24 15:06:39,873 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 43 predicate places. [2023-08-24 15:06:39,873 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 442 flow [2023-08-24 15:06:39,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:39,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 15:06:39,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:39,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1177190389, now seen corresponding path program 5 times [2023-08-24 15:06:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:39,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213468760] [2023-08-24 15:06:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:39,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:39,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213468760] [2023-08-24 15:06:39,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213468760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:39,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:39,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115475110] [2023-08-24 15:06:39,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:39,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:39,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:39,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:39,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:39,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:40,035 INFO L124 PetriNetUnfolderBase]: 130/245 cut-off events. [2023-08-24 15:06:40,035 INFO L125 PetriNetUnfolderBase]: For 1180/1180 co-relation queries the response was YES. [2023-08-24 15:06:40,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 245 events. 130/245 cut-off events. For 1180/1180 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 807 event pairs, 38 based on Foata normal form. 2/245 useless extension candidates. Maximal degree in co-relation 1183. Up to 192 conditions per place. [2023-08-24 15:06:40,038 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 39 selfloop transitions, 17 changer transitions 3/59 dead transitions. [2023-08-24 15:06:40,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 602 flow [2023-08-24 15:06:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-08-24 15:06:40,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2023-08-24 15:06:40,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-08-24 15:06:40,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-08-24 15:06:40,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:40,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-08-24 15:06:40,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,045 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,045 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 442 flow. Second operand 5 states and 679 transitions. [2023-08-24 15:06:40,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 602 flow [2023-08-24 15:06:40,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 568 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-24 15:06:40,052 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 441 flow [2023-08-24 15:06:40,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-24 15:06:40,053 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 43 predicate places. [2023-08-24 15:06:40,053 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 441 flow [2023-08-24 15:06:40,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:40,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:40,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 15:06:40,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:40,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 395300103, now seen corresponding path program 4 times [2023-08-24 15:06:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645787032] [2023-08-24 15:06:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:40,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645787032] [2023-08-24 15:06:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645787032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:40,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:40,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186480330] [2023-08-24 15:06:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:40,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:40,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:40,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 441 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:40,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:40,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:40,199 INFO L124 PetriNetUnfolderBase]: 118/216 cut-off events. [2023-08-24 15:06:40,199 INFO L125 PetriNetUnfolderBase]: For 1153/1153 co-relation queries the response was YES. [2023-08-24 15:06:40,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 216 events. 118/216 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 644 event pairs, 29 based on Foata normal form. 4/218 useless extension candidates. Maximal degree in co-relation 1066. Up to 158 conditions per place. [2023-08-24 15:06:40,201 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 40 selfloop transitions, 18 changer transitions 1/59 dead transitions. [2023-08-24 15:06:40,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 597 flow [2023-08-24 15:06:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 680 transitions. [2023-08-24 15:06:40,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2023-08-24 15:06:40,203 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 680 transitions. [2023-08-24 15:06:40,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 680 transitions. [2023-08-24 15:06:40,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:40,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 680 transitions. [2023-08-24 15:06:40,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,208 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,208 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 441 flow. Second operand 5 states and 680 transitions. [2023-08-24 15:06:40,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 597 flow [2023-08-24 15:06:40,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 557 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-24 15:06:40,214 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 423 flow [2023-08-24 15:06:40,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-24 15:06:40,215 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 42 predicate places. [2023-08-24 15:06:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 423 flow [2023-08-24 15:06:40,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 15:06:40,216 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:40,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1397649263, now seen corresponding path program 6 times [2023-08-24 15:06:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570823253] [2023-08-24 15:06:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:40,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570823253] [2023-08-24 15:06:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570823253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:40,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:40,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:06:40,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559561058] [2023-08-24 15:06:40,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:40,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:06:40,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:06:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:06:40,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:40,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:40,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:40,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:40,366 INFO L124 PetriNetUnfolderBase]: 107/191 cut-off events. [2023-08-24 15:06:40,366 INFO L125 PetriNetUnfolderBase]: For 983/983 co-relation queries the response was YES. [2023-08-24 15:06:40,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 191 events. 107/191 cut-off events. For 983/983 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 534 event pairs, 26 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 921. Up to 141 conditions per place. [2023-08-24 15:06:40,368 INFO L140 encePairwiseOnDemand]: 303/308 looper letters, 42 selfloop transitions, 16 changer transitions 1/59 dead transitions. [2023-08-24 15:06:40,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 580 flow [2023-08-24 15:06:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:06:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:06:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-08-24 15:06:40,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-24 15:06:40,371 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-08-24 15:06:40,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-08-24 15:06:40,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:40,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-08-24 15:06:40,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,376 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 308.0) internal successors, (1848), 6 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,376 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 423 flow. Second operand 5 states and 682 transitions. [2023-08-24 15:06:40,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 580 flow [2023-08-24 15:06:40,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 534 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-24 15:06:40,384 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 394 flow [2023-08-24 15:06:40,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-08-24 15:06:40,385 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 39 predicate places. [2023-08-24 15:06:40,385 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 394 flow [2023-08-24 15:06:40,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:40,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:40,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 15:06:40,386 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:40,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash 169907987, now seen corresponding path program 1 times [2023-08-24 15:06:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:40,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488334564] [2023-08-24 15:06:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:40,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:06:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488334564] [2023-08-24 15:06:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488334564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:06:40,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:06:40,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 15:06:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643972296] [2023-08-24 15:06:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:06:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 15:06:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 15:06:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 15:06:40,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 308 [2023-08-24 15:06:40,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:40,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 308 [2023-08-24 15:06:40,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:40,573 INFO L124 PetriNetUnfolderBase]: 94/178 cut-off events. [2023-08-24 15:06:40,573 INFO L125 PetriNetUnfolderBase]: For 919/927 co-relation queries the response was YES. [2023-08-24 15:06:40,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 178 events. 94/178 cut-off events. For 919/927 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 26 based on Foata normal form. 11/176 useless extension candidates. Maximal degree in co-relation 832. Up to 160 conditions per place. [2023-08-24 15:06:40,575 INFO L140 encePairwiseOnDemand]: 303/308 looper letters, 39 selfloop transitions, 2 changer transitions 5/54 dead transitions. [2023-08-24 15:06:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 500 flow [2023-08-24 15:06:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 15:06:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 15:06:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-24 15:06:40,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969155844155844 [2023-08-24 15:06:40,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-24 15:06:40,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-24 15:06:40,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:40,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-24 15:06:40,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,581 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 308.0) internal successors, (1540), 5 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,581 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 394 flow. Second operand 4 states and 489 transitions. [2023-08-24 15:06:40,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 500 flow [2023-08-24 15:06:40,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 449 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-24 15:06:40,585 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 367 flow [2023-08-24 15:06:40,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-24 15:06:40,586 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-08-24 15:06:40,586 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 367 flow [2023-08-24 15:06:40,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:40,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:40,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:40,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 15:06:40,587 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:40,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash 394242139, now seen corresponding path program 1 times [2023-08-24 15:06:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:40,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175774436] [2023-08-24 15:06:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:40,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175774436] [2023-08-24 15:06:40,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175774436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427255584] [2023-08-24 15:06:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:40,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:40,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:40,929 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) [2023-08-24 15:06:40,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 15:06:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:41,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 15:06:41,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:41,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-24 15:06:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:41,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:41,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-24 15:06:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:41,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427255584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:41,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:41,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-24 15:06:41,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530977070] [2023-08-24 15:06:41,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:41,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:06:41,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:06:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:06:41,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 308 [2023-08-24 15:06:41,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 367 flow. Second operand has 11 states, 11 states have (on average 108.36363636363636) internal successors, (1192), 11 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:41,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:41,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 308 [2023-08-24 15:06:41,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:41,521 INFO L124 PetriNetUnfolderBase]: 373/672 cut-off events. [2023-08-24 15:06:41,522 INFO L125 PetriNetUnfolderBase]: For 1859/1879 co-relation queries the response was YES. [2023-08-24 15:06:41,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 672 events. 373/672 cut-off events. For 1859/1879 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3066 event pairs, 31 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 1935. Up to 256 conditions per place. [2023-08-24 15:06:41,527 INFO L140 encePairwiseOnDemand]: 299/308 looper letters, 94 selfloop transitions, 50 changer transitions 21/173 dead transitions. [2023-08-24 15:06:41,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 173 transitions, 1471 flow [2023-08-24 15:06:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:06:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:06:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1365 transitions. [2023-08-24 15:06:41,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2023-08-24 15:06:41,530 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1365 transitions. [2023-08-24 15:06:41,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1365 transitions. [2023-08-24 15:06:41,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:41,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1365 transitions. [2023-08-24 15:06:41,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 113.75) internal successors, (1365), 12 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:41,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 308.0) internal successors, (4004), 13 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:41,539 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 308.0) internal successors, (4004), 13 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:41,539 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 367 flow. Second operand 12 states and 1365 transitions. [2023-08-24 15:06:41,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 173 transitions, 1471 flow [2023-08-24 15:06:41,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 173 transitions, 1427 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:41,546 INFO L231 Difference]: Finished difference. Result has 75 places, 98 transitions, 1026 flow [2023-08-24 15:06:41,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1026, PETRI_PLACES=75, PETRI_TRANSITIONS=98} [2023-08-24 15:06:41,547 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2023-08-24 15:06:41,547 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 98 transitions, 1026 flow [2023-08-24 15:06:41,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.36363636363636) internal successors, (1192), 11 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:41,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:41,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:41,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:41,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 15:06:41,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:41,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:41,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1826288127, now seen corresponding path program 2 times [2023-08-24 15:06:41,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:41,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103635678] [2023-08-24 15:06:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:41,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:06:41,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103635678] [2023-08-24 15:06:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103635678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312290344] [2023-08-24 15:06:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:06:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:41,952 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) [2023-08-24 15:06:41,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 15:06:42,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:06:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:42,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 15:06:42,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:42,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-24 15:06:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:06:42,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:42,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-08-24 15:06:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:06:42,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312290344] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:42,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:42,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-08-24 15:06:42,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439808963] [2023-08-24 15:06:42,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:42,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:06:42,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:06:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:06:42,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 308 [2023-08-24 15:06:42,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 1026 flow. Second operand has 11 states, 11 states have (on average 108.45454545454545) internal successors, (1193), 11 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:42,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:42,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 308 [2023-08-24 15:06:42,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:42,454 INFO L124 PetriNetUnfolderBase]: 626/1146 cut-off events. [2023-08-24 15:06:42,454 INFO L125 PetriNetUnfolderBase]: For 4842/4871 co-relation queries the response was YES. [2023-08-24 15:06:42,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5566 conditions, 1146 events. 626/1146 cut-off events. For 4842/4871 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6070 event pairs, 84 based on Foata normal form. 22/1139 useless extension candidates. Maximal degree in co-relation 4662. Up to 446 conditions per place. [2023-08-24 15:06:42,464 INFO L140 encePairwiseOnDemand]: 301/308 looper letters, 98 selfloop transitions, 58 changer transitions 24/188 dead transitions. [2023-08-24 15:06:42,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 188 transitions, 2151 flow [2023-08-24 15:06:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:06:42,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:06:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 909 transitions. [2023-08-24 15:06:42,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36891233766233766 [2023-08-24 15:06:42,467 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 909 transitions. [2023-08-24 15:06:42,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 909 transitions. [2023-08-24 15:06:42,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:42,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 909 transitions. [2023-08-24 15:06:42,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.625) internal successors, (909), 8 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:42,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:42,473 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 308.0) internal successors, (2772), 9 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:42,473 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 1026 flow. Second operand 8 states and 909 transitions. [2023-08-24 15:06:42,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 188 transitions, 2151 flow [2023-08-24 15:06:42,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 188 transitions, 2083 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-08-24 15:06:42,487 INFO L231 Difference]: Finished difference. Result has 86 places, 127 transitions, 1593 flow [2023-08-24 15:06:42,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1593, PETRI_PLACES=86, PETRI_TRANSITIONS=127} [2023-08-24 15:06:42,487 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 64 predicate places. [2023-08-24 15:06:42,487 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 127 transitions, 1593 flow [2023-08-24 15:06:42,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 108.45454545454545) internal successors, (1193), 11 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:42,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:42,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:42,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:42,696 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,SelfDestructingSolverStorable16 [2023-08-24 15:06:42,697 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:42,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -545466844, now seen corresponding path program 3 times [2023-08-24 15:06:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740981186] [2023-08-24 15:06:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:06:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740981186] [2023-08-24 15:06:43,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740981186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925791136] [2023-08-24 15:06:43,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:06:43,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:43,155 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) [2023-08-24 15:06:43,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 15:06:43,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:06:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:43,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 15:06:43,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:43,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 15:06:43,388 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:06:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:06:43,509 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 15:06:43,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2023-08-24 15:06:43,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 15:06:43,603 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 15:06:43,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-24 15:06:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:06:43,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:43,912 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:06:43,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 84 [2023-08-24 15:06:43,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:06:43,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 277 [2023-08-24 15:06:44,017 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:06:44,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 215 [2023-08-24 15:06:44,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2023-08-24 15:06:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:06:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925791136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:50,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:50,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 15:06:50,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276468983] [2023-08-24 15:06:50,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:50,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:06:50,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:50,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:06:50,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:06:50,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 308 [2023-08-24 15:06:50,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 127 transitions, 1593 flow. Second operand has 21 states, 21 states have (on average 94.14285714285714) internal successors, (1977), 21 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:50,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:50,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 308 [2023-08-24 15:06:50,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:51,188 INFO L124 PetriNetUnfolderBase]: 688/1258 cut-off events. [2023-08-24 15:06:51,188 INFO L125 PetriNetUnfolderBase]: For 6780/6812 co-relation queries the response was YES. [2023-08-24 15:06:51,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6518 conditions, 1258 events. 688/1258 cut-off events. For 6780/6812 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6871 event pairs, 93 based on Foata normal form. 24/1262 useless extension candidates. Maximal degree in co-relation 6443. Up to 642 conditions per place. [2023-08-24 15:06:51,199 INFO L140 encePairwiseOnDemand]: 300/308 looper letters, 91 selfloop transitions, 54 changer transitions 41/194 dead transitions. [2023-08-24 15:06:51,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 194 transitions, 2447 flow [2023-08-24 15:06:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:06:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:06:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 986 transitions. [2023-08-24 15:06:51,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32012987012987015 [2023-08-24 15:06:51,202 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 986 transitions. [2023-08-24 15:06:51,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 986 transitions. [2023-08-24 15:06:51,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:51,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 986 transitions. [2023-08-24 15:06:51,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.6) internal successors, (986), 10 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:51,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:51,209 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 308.0) internal successors, (3388), 11 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:51,209 INFO L175 Difference]: Start difference. First operand has 86 places, 127 transitions, 1593 flow. Second operand 10 states and 986 transitions. [2023-08-24 15:06:51,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 194 transitions, 2447 flow [2023-08-24 15:06:51,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 194 transitions, 2375 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-08-24 15:06:51,233 INFO L231 Difference]: Finished difference. Result has 93 places, 130 transitions, 1695 flow [2023-08-24 15:06:51,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1695, PETRI_PLACES=93, PETRI_TRANSITIONS=130} [2023-08-24 15:06:51,234 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2023-08-24 15:06:51,234 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 130 transitions, 1695 flow [2023-08-24 15:06:51,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.14285714285714) internal successors, (1977), 21 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:51,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:51,235 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:51,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:51,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 15:06:51,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:51,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1675522190, now seen corresponding path program 4 times [2023-08-24 15:06:51,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:51,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975063246] [2023-08-24 15:06:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:51,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:51,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975063246] [2023-08-24 15:06:51,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975063246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:51,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959435543] [2023-08-24 15:06:51,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:06:51,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:51,535 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) [2023-08-24 15:06:51,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 15:06:51,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:06:51,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:51,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:06:51,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:51,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959435543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:51,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:51,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 15:06:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121040457] [2023-08-24 15:06:51,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:51,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:06:51,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:51,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:06:51,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:06:51,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:51,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 130 transitions, 1695 flow. Second operand has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:51,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:51,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:51,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:52,090 INFO L124 PetriNetUnfolderBase]: 831/1458 cut-off events. [2023-08-24 15:06:52,090 INFO L125 PetriNetUnfolderBase]: For 8049/8049 co-relation queries the response was YES. [2023-08-24 15:06:52,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7474 conditions, 1458 events. 831/1458 cut-off events. For 8049/8049 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7537 event pairs, 175 based on Foata normal form. 88/1544 useless extension candidates. Maximal degree in co-relation 7391. Up to 1030 conditions per place. [2023-08-24 15:06:52,104 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 133 selfloop transitions, 90 changer transitions 3/226 dead transitions. [2023-08-24 15:06:52,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 226 transitions, 3093 flow [2023-08-24 15:06:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:06:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:06:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1482 transitions. [2023-08-24 15:06:52,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4374262101534829 [2023-08-24 15:06:52,107 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1482 transitions. [2023-08-24 15:06:52,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1482 transitions. [2023-08-24 15:06:52,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:52,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1482 transitions. [2023-08-24 15:06:52,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 134.72727272727272) internal successors, (1482), 11 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:52,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:52,114 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 308.0) internal successors, (3696), 12 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:52,114 INFO L175 Difference]: Start difference. First operand has 93 places, 130 transitions, 1695 flow. Second operand 11 states and 1482 transitions. [2023-08-24 15:06:52,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 226 transitions, 3093 flow [2023-08-24 15:06:52,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 226 transitions, 2844 flow, removed 112 selfloop flow, removed 4 redundant places. [2023-08-24 15:06:52,139 INFO L231 Difference]: Finished difference. Result has 102 places, 182 transitions, 2407 flow [2023-08-24 15:06:52,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2407, PETRI_PLACES=102, PETRI_TRANSITIONS=182} [2023-08-24 15:06:52,140 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 80 predicate places. [2023-08-24 15:06:52,140 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 182 transitions, 2407 flow [2023-08-24 15:06:52,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.53846153846155) internal successors, (1710), 13 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:52,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:52,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:52,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:52,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:52,346 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:52,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash -850743530, now seen corresponding path program 5 times [2023-08-24 15:06:52,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:52,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999789523] [2023-08-24 15:06:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:52,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:52,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:52,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999789523] [2023-08-24 15:06:52,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999789523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:52,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276787533] [2023-08-24 15:06:52,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:06:52,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:52,472 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) [2023-08-24 15:06:52,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 15:06:52,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:06:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:52,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:06:52,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:52,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 15:06:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276787533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:52,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:52,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 15:06:52,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907918554] [2023-08-24 15:06:52,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:52,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:06:52,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:06:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:06:52,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:52,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 182 transitions, 2407 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:52,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:52,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:52,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:53,062 INFO L124 PetriNetUnfolderBase]: 776/1383 cut-off events. [2023-08-24 15:06:53,062 INFO L125 PetriNetUnfolderBase]: For 7625/7625 co-relation queries the response was YES. [2023-08-24 15:06:53,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7953 conditions, 1383 events. 776/1383 cut-off events. For 7625/7625 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7261 event pairs, 204 based on Foata normal form. 62/1443 useless extension candidates. Maximal degree in co-relation 6732. Up to 1015 conditions per place. [2023-08-24 15:06:53,077 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 131 selfloop transitions, 101 changer transitions 8/240 dead transitions. [2023-08-24 15:06:53,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 240 transitions, 3474 flow [2023-08-24 15:06:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:06:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:06:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2007 transitions. [2023-08-24 15:06:53,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344155844155844 [2023-08-24 15:06:53,080 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2007 transitions. [2023-08-24 15:06:53,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2007 transitions. [2023-08-24 15:06:53,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:53,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2007 transitions. [2023-08-24 15:06:53,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 133.8) internal successors, (2007), 15 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:53,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:53,089 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:53,089 INFO L175 Difference]: Start difference. First operand has 102 places, 182 transitions, 2407 flow. Second operand 15 states and 2007 transitions. [2023-08-24 15:06:53,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 240 transitions, 3474 flow [2023-08-24 15:06:53,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 240 transitions, 3172 flow, removed 148 selfloop flow, removed 1 redundant places. [2023-08-24 15:06:53,126 INFO L231 Difference]: Finished difference. Result has 118 places, 194 transitions, 2599 flow [2023-08-24 15:06:53,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2599, PETRI_PLACES=118, PETRI_TRANSITIONS=194} [2023-08-24 15:06:53,127 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 96 predicate places. [2023-08-24 15:06:53,127 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 194 transitions, 2599 flow [2023-08-24 15:06:53,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:53,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:53,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:53,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:53,333 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:53,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1466891166, now seen corresponding path program 6 times [2023-08-24 15:06:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922885851] [2023-08-24 15:06:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:06:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922885851] [2023-08-24 15:06:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922885851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146034203] [2023-08-24 15:06:54,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:06:54,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:54,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:54,029 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) [2023-08-24 15:06:54,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 15:06:54,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:06:54,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:54,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 15:06:54,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:06:54,292 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 15:06:54,292 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2023-08-24 15:06:54,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-08-24 15:06:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:54,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:54,353 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_547 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_547) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2023-08-24 15:06:54,366 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:06:54,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2023-08-24 15:06:54,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-24 15:06:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 15:06:54,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146034203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:54,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:54,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2023-08-24 15:06:54,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947387593] [2023-08-24 15:06:54,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:54,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:06:54,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:06:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=254, Unknown=1, NotChecked=32, Total=342 [2023-08-24 15:06:54,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 308 [2023-08-24 15:06:54,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 194 transitions, 2599 flow. Second operand has 19 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:54,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:54,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 308 [2023-08-24 15:06:54,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:57,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 15:06:57,273 INFO L124 PetriNetUnfolderBase]: 899/1628 cut-off events. [2023-08-24 15:06:57,274 INFO L125 PetriNetUnfolderBase]: For 11493/11535 co-relation queries the response was YES. [2023-08-24 15:06:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9832 conditions, 1628 events. 899/1628 cut-off events. For 11493/11535 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9184 event pairs, 58 based on Foata normal form. 38/1643 useless extension candidates. Maximal degree in co-relation 9429. Up to 1060 conditions per place. [2023-08-24 15:06:57,292 INFO L140 encePairwiseOnDemand]: 295/308 looper letters, 187 selfloop transitions, 101 changer transitions 4/300 dead transitions. [2023-08-24 15:06:57,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 300 transitions, 4186 flow [2023-08-24 15:06:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 15:06:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 15:06:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1698 transitions. [2023-08-24 15:06:57,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242933537051184 [2023-08-24 15:06:57,295 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1698 transitions. [2023-08-24 15:06:57,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1698 transitions. [2023-08-24 15:06:57,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:57,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1698 transitions. [2023-08-24 15:06:57,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.88235294117646) internal successors, (1698), 17 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:57,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:57,303 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:57,303 INFO L175 Difference]: Start difference. First operand has 118 places, 194 transitions, 2599 flow. Second operand 17 states and 1698 transitions. [2023-08-24 15:06:57,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 300 transitions, 4186 flow [2023-08-24 15:06:57,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 300 transitions, 3949 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-08-24 15:06:57,351 INFO L231 Difference]: Finished difference. Result has 130 places, 251 transitions, 3416 flow [2023-08-24 15:06:57,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3416, PETRI_PLACES=130, PETRI_TRANSITIONS=251} [2023-08-24 15:06:57,352 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2023-08-24 15:06:57,352 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 251 transitions, 3416 flow [2023-08-24 15:06:57,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.89473684210526) internal successors, (1822), 19 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:57,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:57,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:57,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:57,558 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:57,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash -573920790, now seen corresponding path program 7 times [2023-08-24 15:06:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:57,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533030406] [2023-08-24 15:06:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:57,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:57,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533030406] [2023-08-24 15:06:57,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533030406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:57,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678161065] [2023-08-24 15:06:57,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:06:57,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:57,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:57,659 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) [2023-08-24 15:06:57,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 15:06:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:57,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:06:57,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:57,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678161065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:57,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:57,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 15:06:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752914741] [2023-08-24 15:06:57,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:57,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:06:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:06:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:06:57,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:57,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 251 transitions, 3416 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:57,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:57,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:57,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:58,449 INFO L124 PetriNetUnfolderBase]: 1128/1997 cut-off events. [2023-08-24 15:06:58,450 INFO L125 PetriNetUnfolderBase]: For 16754/16754 co-relation queries the response was YES. [2023-08-24 15:06:58,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13532 conditions, 1997 events. 1128/1997 cut-off events. For 16754/16754 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11154 event pairs, 120 based on Foata normal form. 88/2079 useless extension candidates. Maximal degree in co-relation 12685. Up to 884 conditions per place. [2023-08-24 15:06:58,476 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 251 selfloop transitions, 121 changer transitions 7/379 dead transitions. [2023-08-24 15:06:58,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 379 transitions, 5848 flow [2023-08-24 15:06:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:06:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:06:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1750 transitions. [2023-08-24 15:06:58,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370629370629371 [2023-08-24 15:06:58,480 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1750 transitions. [2023-08-24 15:06:58,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1750 transitions. [2023-08-24 15:06:58,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:58,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1750 transitions. [2023-08-24 15:06:58,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.6153846153846) internal successors, (1750), 13 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:58,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:58,487 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:58,487 INFO L175 Difference]: Start difference. First operand has 130 places, 251 transitions, 3416 flow. Second operand 13 states and 1750 transitions. [2023-08-24 15:06:58,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 379 transitions, 5848 flow [2023-08-24 15:06:58,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 379 transitions, 5495 flow, removed 171 selfloop flow, removed 3 redundant places. [2023-08-24 15:06:58,557 INFO L231 Difference]: Finished difference. Result has 146 places, 300 transitions, 4367 flow [2023-08-24 15:06:58,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4367, PETRI_PLACES=146, PETRI_TRANSITIONS=300} [2023-08-24 15:06:58,558 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2023-08-24 15:06:58,558 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 300 transitions, 4367 flow [2023-08-24 15:06:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:58,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:58,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:58,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 15:06:58,763 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,SelfDestructingSolverStorable21 [2023-08-24 15:06:58,764 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:06:58,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:06:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2057165143, now seen corresponding path program 8 times [2023-08-24 15:06:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:06:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732232099] [2023-08-24 15:06:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:06:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:06:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:06:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:58,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:06:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732232099] [2023-08-24 15:06:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732232099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:06:58,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086974250] [2023-08-24 15:06:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:06:58,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:06:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:06:58,861 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) [2023-08-24 15:06:58,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 15:06:58,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:06:58,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:06:58,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:06:58,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:06:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:59,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:06:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:06:59,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086974250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:06:59,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:06:59,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 15:06:59,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460952240] [2023-08-24 15:06:59,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:06:59,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:06:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:06:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:06:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:06:59,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:06:59,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 300 transitions, 4367 flow. Second operand has 12 states, 12 states have (on average 131.41666666666666) internal successors, (1577), 12 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:59,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:06:59,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:06:59,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:06:59,822 INFO L124 PetriNetUnfolderBase]: 1269/2230 cut-off events. [2023-08-24 15:06:59,822 INFO L125 PetriNetUnfolderBase]: For 22768/22768 co-relation queries the response was YES. [2023-08-24 15:06:59,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16277 conditions, 2230 events. 1269/2230 cut-off events. For 22768/22768 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12709 event pairs, 122 based on Foata normal form. 88/2312 useless extension candidates. Maximal degree in co-relation 15210. Up to 947 conditions per place. [2023-08-24 15:06:59,849 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 269 selfloop transitions, 164 changer transitions 15/448 dead transitions. [2023-08-24 15:06:59,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 448 transitions, 7234 flow [2023-08-24 15:06:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:06:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:06:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2150 transitions. [2023-08-24 15:06:59,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362824675324675 [2023-08-24 15:06:59,852 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2150 transitions. [2023-08-24 15:06:59,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2150 transitions. [2023-08-24 15:06:59,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:06:59,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2150 transitions. [2023-08-24 15:06:59,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 134.375) internal successors, (2150), 16 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:59,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 308.0) internal successors, (5236), 17 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:59,862 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 308.0) internal successors, (5236), 17 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:59,862 INFO L175 Difference]: Start difference. First operand has 146 places, 300 transitions, 4367 flow. Second operand 16 states and 2150 transitions. [2023-08-24 15:06:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 448 transitions, 7234 flow [2023-08-24 15:06:59,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 448 transitions, 6767 flow, removed 193 selfloop flow, removed 2 redundant places. [2023-08-24 15:06:59,972 INFO L231 Difference]: Finished difference. Result has 167 places, 367 transitions, 5522 flow [2023-08-24 15:06:59,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5522, PETRI_PLACES=167, PETRI_TRANSITIONS=367} [2023-08-24 15:06:59,972 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2023-08-24 15:06:59,973 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 367 transitions, 5522 flow [2023-08-24 15:06:59,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.41666666666666) internal successors, (1577), 12 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:06:59,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:06:59,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:06:59,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 15:07:00,178 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,SelfDestructingSolverStorable22 [2023-08-24 15:07:00,179 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:00,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2049943007, now seen corresponding path program 9 times [2023-08-24 15:07:00,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233517930] [2023-08-24 15:07:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233517930] [2023-08-24 15:07:00,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233517930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748624260] [2023-08-24 15:07:00,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:07:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:00,272 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) [2023-08-24 15:07:00,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 15:07:00,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:07:00,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:00,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:07:00,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:00,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:00,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748624260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:00,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:00,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 15:07:00,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566230820] [2023-08-24 15:07:00,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:00,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 15:07:00,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 15:07:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 15:07:00,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:07:00,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 367 transitions, 5522 flow. Second operand has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:00,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:00,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:07:00,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:07:01,206 INFO L124 PetriNetUnfolderBase]: 1213/2174 cut-off events. [2023-08-24 15:07:01,206 INFO L125 PetriNetUnfolderBase]: For 26260/26260 co-relation queries the response was YES. [2023-08-24 15:07:01,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16754 conditions, 2174 events. 1213/2174 cut-off events. For 26260/26260 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12711 event pairs, 142 based on Foata normal form. 28/2196 useless extension candidates. Maximal degree in co-relation 15638. Up to 1008 conditions per place. [2023-08-24 15:07:01,233 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 276 selfloop transitions, 145 changer transitions 3/424 dead transitions. [2023-08-24 15:07:01,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 424 transitions, 7098 flow [2023-08-24 15:07:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:07:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:07:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1744 transitions. [2023-08-24 15:07:01,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355644355644356 [2023-08-24 15:07:01,235 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1744 transitions. [2023-08-24 15:07:01,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1744 transitions. [2023-08-24 15:07:01,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:07:01,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1744 transitions. [2023-08-24 15:07:01,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.15384615384616) internal successors, (1744), 13 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) [2023-08-24 15:07:01,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:01,244 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 308.0) internal successors, (4312), 14 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:01,244 INFO L175 Difference]: Start difference. First operand has 167 places, 367 transitions, 5522 flow. Second operand 13 states and 1744 transitions. [2023-08-24 15:07:01,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 424 transitions, 7098 flow [2023-08-24 15:07:01,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 424 transitions, 6431 flow, removed 252 selfloop flow, removed 6 redundant places. [2023-08-24 15:07:01,378 INFO L231 Difference]: Finished difference. Result has 175 places, 364 transitions, 5143 flow [2023-08-24 15:07:01,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5143, PETRI_PLACES=175, PETRI_TRANSITIONS=364} [2023-08-24 15:07:01,379 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2023-08-24 15:07:01,379 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 364 transitions, 5143 flow [2023-08-24 15:07:01,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 131.33333333333334) internal successors, (1576), 12 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:01,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:01,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:01,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 15:07:01,579 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,SelfDestructingSolverStorable23 [2023-08-24 15:07:01,580 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:01,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1011079955, now seen corresponding path program 10 times [2023-08-24 15:07:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:01,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464447067] [2023-08-24 15:07:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:01,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:01,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464447067] [2023-08-24 15:07:01,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464447067] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189673255] [2023-08-24 15:07:01,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:07:01,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:01,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:01,673 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) [2023-08-24 15:07:01,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 15:07:01,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:07:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:01,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:07:01,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:01,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 15:07:01,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189673255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:01,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:01,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 15:07:01,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296016684] [2023-08-24 15:07:01,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:01,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:07:01,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:07:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:07:01,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:07:01,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 364 transitions, 5143 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:01,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:01,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:07:01,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:07:02,552 INFO L124 PetriNetUnfolderBase]: 1319/2332 cut-off events. [2023-08-24 15:07:02,552 INFO L125 PetriNetUnfolderBase]: For 27642/27642 co-relation queries the response was YES. [2023-08-24 15:07:02,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18105 conditions, 2332 events. 1319/2332 cut-off events. For 27642/27642 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13661 event pairs, 148 based on Foata normal form. 16/2342 useless extension candidates. Maximal degree in co-relation 17628. Up to 1056 conditions per place. [2023-08-24 15:07:02,573 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 261 selfloop transitions, 193 changer transitions 8/462 dead transitions. [2023-08-24 15:07:02,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 462 transitions, 7487 flow [2023-08-24 15:07:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:07:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:07:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1879 transitions. [2023-08-24 15:07:02,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435760667903525 [2023-08-24 15:07:02,576 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1879 transitions. [2023-08-24 15:07:02,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1879 transitions. [2023-08-24 15:07:02,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:07:02,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1879 transitions. [2023-08-24 15:07:02,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.21428571428572) internal successors, (1879), 14 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:02,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 308.0) internal successors, (4620), 15 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:02,583 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 308.0) internal successors, (4620), 15 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:02,583 INFO L175 Difference]: Start difference. First operand has 175 places, 364 transitions, 5143 flow. Second operand 14 states and 1879 transitions. [2023-08-24 15:07:02,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 462 transitions, 7487 flow [2023-08-24 15:07:02,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 462 transitions, 7220 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 15:07:02,722 INFO L231 Difference]: Finished difference. Result has 185 places, 396 transitions, 6122 flow [2023-08-24 15:07:02,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6122, PETRI_PLACES=185, PETRI_TRANSITIONS=396} [2023-08-24 15:07:02,723 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 163 predicate places. [2023-08-24 15:07:02,723 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 396 transitions, 6122 flow [2023-08-24 15:07:02,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:02,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:02,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:02,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 15:07:02,929 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,SelfDestructingSolverStorable24 [2023-08-24 15:07:02,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:02,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash 491336879, now seen corresponding path program 11 times [2023-08-24 15:07:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390767461] [2023-08-24 15:07:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:03,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390767461] [2023-08-24 15:07:03,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390767461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:03,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117079626] [2023-08-24 15:07:03,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:07:03,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:03,053 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) [2023-08-24 15:07:03,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 15:07:03,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:07:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:03,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:07:03,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:03,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117079626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:03,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:03,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 15:07:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820469630] [2023-08-24 15:07:03,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:03,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:07:03,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:07:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:07:03,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:07:03,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 396 transitions, 6122 flow. Second operand has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:03,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:03,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:07:03,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:07:03,923 INFO L124 PetriNetUnfolderBase]: 1326/2353 cut-off events. [2023-08-24 15:07:03,924 INFO L125 PetriNetUnfolderBase]: For 32494/32494 co-relation queries the response was YES. [2023-08-24 15:07:03,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19289 conditions, 2353 events. 1326/2353 cut-off events. For 32494/32494 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 13880 event pairs, 144 based on Foata normal form. 12/2359 useless extension candidates. Maximal degree in co-relation 18932. Up to 1056 conditions per place. [2023-08-24 15:07:03,953 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 268 selfloop transitions, 192 changer transitions 15/475 dead transitions. [2023-08-24 15:07:03,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 475 transitions, 8288 flow [2023-08-24 15:07:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 15:07:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 15:07:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2271 transitions. [2023-08-24 15:07:03,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337280366692131 [2023-08-24 15:07:03,956 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2271 transitions. [2023-08-24 15:07:03,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2271 transitions. [2023-08-24 15:07:03,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:07:03,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2271 transitions. [2023-08-24 15:07:03,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 133.58823529411765) internal successors, (2271), 17 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:03,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:03,965 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:03,965 INFO L175 Difference]: Start difference. First operand has 185 places, 396 transitions, 6122 flow. Second operand 17 states and 2271 transitions. [2023-08-24 15:07:03,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 475 transitions, 8288 flow [2023-08-24 15:07:04,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 475 transitions, 7884 flow, removed 151 selfloop flow, removed 5 redundant places. [2023-08-24 15:07:04,165 INFO L231 Difference]: Finished difference. Result has 201 places, 402 transitions, 6533 flow [2023-08-24 15:07:04,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6533, PETRI_PLACES=201, PETRI_TRANSITIONS=402} [2023-08-24 15:07:04,165 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 179 predicate places. [2023-08-24 15:07:04,165 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 402 transitions, 6533 flow [2023-08-24 15:07:04,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.0) internal successors, (1965), 15 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:04,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:04,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:04,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 15:07:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:04,372 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:04,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -800975087, now seen corresponding path program 12 times [2023-08-24 15:07:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706444252] [2023-08-24 15:07:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:04,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:04,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706444252] [2023-08-24 15:07:04,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706444252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:04,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130508040] [2023-08-24 15:07:04,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:07:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:04,475 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) [2023-08-24 15:07:04,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 15:07:04,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:07:04,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:04,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:07:04,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:04,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130508040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:04,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:04,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 15:07:04,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771759537] [2023-08-24 15:07:04,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:04,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:07:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:07:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:07:04,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:07:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 402 transitions, 6533 flow. Second operand has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:04,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:04,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:07:04,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:07:05,355 INFO L124 PetriNetUnfolderBase]: 1388/2475 cut-off events. [2023-08-24 15:07:05,355 INFO L125 PetriNetUnfolderBase]: For 35361/35361 co-relation queries the response was YES. [2023-08-24 15:07:05,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20660 conditions, 2475 events. 1388/2475 cut-off events. For 35361/35361 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14848 event pairs, 140 based on Foata normal form. 40/2509 useless extension candidates. Maximal degree in co-relation 20537. Up to 1086 conditions per place. [2023-08-24 15:07:05,382 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 242 selfloop transitions, 269 changer transitions 3/514 dead transitions. [2023-08-24 15:07:05,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 514 transitions, 9223 flow [2023-08-24 15:07:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 15:07:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 15:07:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2282 transitions. [2023-08-24 15:07:05,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358288770053476 [2023-08-24 15:07:05,386 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2282 transitions. [2023-08-24 15:07:05,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2282 transitions. [2023-08-24 15:07:05,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:07:05,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2282 transitions. [2023-08-24 15:07:05,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.23529411764707) internal successors, (2282), 17 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:05,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:05,393 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 308.0) internal successors, (5544), 18 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:05,393 INFO L175 Difference]: Start difference. First operand has 201 places, 402 transitions, 6533 flow. Second operand 17 states and 2282 transitions. [2023-08-24 15:07:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 514 transitions, 9223 flow [2023-08-24 15:07:05,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 514 transitions, 8945 flow, removed 45 selfloop flow, removed 9 redundant places. [2023-08-24 15:07:05,605 INFO L231 Difference]: Finished difference. Result has 208 places, 454 transitions, 7983 flow [2023-08-24 15:07:05,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=6241, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7983, PETRI_PLACES=208, PETRI_TRANSITIONS=454} [2023-08-24 15:07:05,606 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 186 predicate places. [2023-08-24 15:07:05,606 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 454 transitions, 7983 flow [2023-08-24 15:07:05,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.3846153846154) internal successors, (1708), 13 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:05,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:05,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:05,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 15:07:05,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 15:07:05,813 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:05,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1291641803, now seen corresponding path program 13 times [2023-08-24 15:07:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:05,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661148252] [2023-08-24 15:07:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:05,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661148252] [2023-08-24 15:07:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661148252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209984920] [2023-08-24 15:07:05,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:07:05,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:05,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:05,907 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) [2023-08-24 15:07:05,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 15:07:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:06,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:07:06,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:06,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 15:07:06,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209984920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:06,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:06,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 15:07:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421723132] [2023-08-24 15:07:06,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:06,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:07:06,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:07:06,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:07:06,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:07:06,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 454 transitions, 7983 flow. Second operand has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:06,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:06,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:07:06,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:07:06,801 INFO L124 PetriNetUnfolderBase]: 1451/2590 cut-off events. [2023-08-24 15:07:06,801 INFO L125 PetriNetUnfolderBase]: For 43606/43606 co-relation queries the response was YES. [2023-08-24 15:07:06,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 2590 events. 1451/2590 cut-off events. For 43606/43606 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15676 event pairs, 347 based on Foata normal form. 60/2644 useless extension candidates. Maximal degree in co-relation 22189. Up to 2185 conditions per place. [2023-08-24 15:07:06,828 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 437 selfloop transitions, 100 changer transitions 3/540 dead transitions. [2023-08-24 15:07:06,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 540 transitions, 10526 flow [2023-08-24 15:07:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:07:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:07:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2015 transitions. [2023-08-24 15:07:06,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43614718614718617 [2023-08-24 15:07:06,831 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2015 transitions. [2023-08-24 15:07:06,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2015 transitions. [2023-08-24 15:07:06,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:07:06,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2015 transitions. [2023-08-24 15:07:06,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 134.33333333333334) internal successors, (2015), 15 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:06,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:06,838 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 308.0) internal successors, (4928), 16 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:06,838 INFO L175 Difference]: Start difference. First operand has 208 places, 454 transitions, 7983 flow. Second operand 15 states and 2015 transitions. [2023-08-24 15:07:06,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 540 transitions, 10526 flow [2023-08-24 15:07:07,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 540 transitions, 9840 flow, removed 162 selfloop flow, removed 10 redundant places. [2023-08-24 15:07:07,081 INFO L231 Difference]: Finished difference. Result has 217 places, 496 transitions, 8514 flow [2023-08-24 15:07:07,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=7291, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8514, PETRI_PLACES=217, PETRI_TRANSITIONS=496} [2023-08-24 15:07:07,082 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 195 predicate places. [2023-08-24 15:07:07,082 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 496 transitions, 8514 flow [2023-08-24 15:07:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 131.23076923076923) internal successors, (1706), 13 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:07,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:07,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:07,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-24 15:07:07,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 15:07:07,288 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:07,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1611689269, now seen corresponding path program 14 times [2023-08-24 15:07:07,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:07,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601673542] [2023-08-24 15:07:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601673542] [2023-08-24 15:07:07,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601673542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305572260] [2023-08-24 15:07:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:07:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:07,381 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) [2023-08-24 15:07:07,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 15:07:07,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:07:07,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:07,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:07:07,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:07,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:07,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305572260] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:07:07,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:07:07,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 15:07:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802335729] [2023-08-24 15:07:07,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:07:07,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:07:07,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:07:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:07:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:07:07,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 308 [2023-08-24 15:07:07,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 496 transitions, 8514 flow. Second operand has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:07,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:07:07,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 308 [2023-08-24 15:07:07,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:07:08,480 INFO L124 PetriNetUnfolderBase]: 1722/3019 cut-off events. [2023-08-24 15:07:08,481 INFO L125 PetriNetUnfolderBase]: For 50107/50107 co-relation queries the response was YES. [2023-08-24 15:07:08,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 3019 events. 1722/3019 cut-off events. For 50107/50107 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18493 event pairs, 123 based on Foata normal form. 106/3119 useless extension candidates. Maximal degree in co-relation 25501. Up to 1443 conditions per place. [2023-08-24 15:07:08,511 INFO L140 encePairwiseOnDemand]: 302/308 looper letters, 448 selfloop transitions, 220 changer transitions 0/668 dead transitions. [2023-08-24 15:07:08,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 668 transitions, 12355 flow [2023-08-24 15:07:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 15:07:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 15:07:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3073 transitions. [2023-08-24 15:07:08,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43379446640316205 [2023-08-24 15:07:08,516 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3073 transitions. [2023-08-24 15:07:08,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3073 transitions. [2023-08-24 15:07:08,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:07:08,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3073 transitions. [2023-08-24 15:07:08,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 133.6086956521739) internal successors, (3073), 23 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:08,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 308.0) internal successors, (7392), 24 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:08,526 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 308.0) internal successors, (7392), 24 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:08,526 INFO L175 Difference]: Start difference. First operand has 217 places, 496 transitions, 8514 flow. Second operand 23 states and 3073 transitions. [2023-08-24 15:07:08,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 668 transitions, 12355 flow [2023-08-24 15:07:08,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 668 transitions, 11772 flow, removed 264 selfloop flow, removed 3 redundant places. [2023-08-24 15:07:08,788 INFO L231 Difference]: Finished difference. Result has 249 places, 623 transitions, 10691 flow [2023-08-24 15:07:08,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=308, PETRI_DIFFERENCE_MINUEND_FLOW=7931, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10691, PETRI_PLACES=249, PETRI_TRANSITIONS=623} [2023-08-24 15:07:08,789 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 227 predicate places. [2023-08-24 15:07:08,789 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 623 transitions, 10691 flow [2023-08-24 15:07:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.13333333333333) internal successors, (1967), 15 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:07:08,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:07:08,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:07:08,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 15:07:08,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 15:07:08,993 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:07:08,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:07:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1464889495, now seen corresponding path program 15 times [2023-08-24 15:07:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:07:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443196149] [2023-08-24 15:07:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:07:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:07:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:07:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 15:07:09,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:07:09,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443196149] [2023-08-24 15:07:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443196149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:07:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263283470] [2023-08-24 15:07:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:07:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:07:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:07:09,077 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) [2023-08-24 15:07:09,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 15:07:09,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:07:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:07:09,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 15:07:09,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:07:09,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:07:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:07:09,254 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-24 15:07:09,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-24 15:07:09,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 15:07:09,340 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:07:09,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 15:07:09,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:07:09,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:07:09,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:07:09,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:07:09,509 INFO L322 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2023-08-24 15:07:09,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2023-08-24 15:07:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:07:09,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:07:09,723 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_934 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_214 Int) (~f_inv~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934))) (let ((.cse1 (select .cse2 c_~f~0.base)) (.cse0 (select (select .cse2 ~f_inv~0.base) (+ (* c_~counter~0 4) ~f_inv~0.offset)))) (or (<= c_~n~0 .cse0) (< .cse0 0) (< v_~counter~0_214 0) (= (select .cse1 (+ c_~f~0.offset (* v_~counter~0_214 4))) 0) (<= c_~n~0 v_~counter~0_214) (not (= c_~counter~0 (select .cse1 (+ c_~f~0.offset (* .cse0 4))))))))) is different from false [2023-08-24 15:07:09,764 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_934 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_214 Int) (~f_inv~0.offset Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934))) (let ((.cse0 (select (select .cse2 ~f_inv~0.base) (+ (* c_~counter~0 4) ~f_inv~0.offset))) (.cse1 (select .cse2 c_~f~0.base))) (or (< .cse0 0) (not (= c_~counter~0 (select .cse1 (+ c_~f~0.offset (* .cse0 4))))) (<= c_~n~0 .cse0) (< v_~counter~0_214 0) (= (select .cse1 (+ c_~f~0.offset (* v_~counter~0_214 4))) 0) (<= c_~n~0 v_~counter~0_214))))) is different from false [2023-08-24 15:07:09,788 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_932 (Array Int Int)) (v_ArrVal_934 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_214 Int) (~f_inv~0.offset Int)) (let ((.cse2 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_932) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_934))) (let ((.cse0 (select .cse2 c_~f~0.base)) (.cse1 (select (select .cse2 ~f_inv~0.base) (+ (* c_~counter~0 4) ~f_inv~0.offset)))) (or (not (= (select .cse0 (+ (* .cse1 4) c_~f~0.offset)) c_~counter~0)) (<= c_~n~0 .cse1) (< v_~counter~0_214 0) (= (select .cse0 (+ c_~f~0.offset (* v_~counter~0_214 4))) 0) (< .cse1 0) (<= c_~n~0 v_~counter~0_214))))) is different from false [2023-08-24 15:07:09,898 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:07:09,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 111 [2023-08-24 15:07:10,061 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:07:10,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 57310 treesize of output 51995 [2023-08-24 15:07:10,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:07:10,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1936 treesize of output 1999 [2023-08-24 15:07:10,717 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:07:10,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2010 treesize of output 1641 [2023-08-24 15:07:11,055 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:07:11,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1426 treesize of output 1379 [2023-08-24 15:07:11,249 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. Received shutdown request... [2023-08-24 15:20:22,042 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 15:20:22,043 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 15:20:22,045 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:20:22,046 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:20:22,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 15:20:22,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:20:22,244 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 27ms.. [2023-08-24 15:20:22,246 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 15:20:22,246 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 15:20:22,246 INFO L445 BasicCegarLoop]: Path program histogram: [15, 6, 4, 2, 1, 1, 1] [2023-08-24 15:20:22,249 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:20:22,249 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:20:22,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:20:22 BasicIcfg [2023-08-24 15:20:22,251 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:20:22,251 INFO L158 Benchmark]: Toolchain (without parser) took 831909.23ms. Allocated memory was 413.1MB in the beginning and 2.2GB in the end (delta: 1.7GB). Free memory was 390.1MB in the beginning and 1.0GB in the end (delta: -658.0MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-24 15:20:22,251 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 413.1MB. Free memory was 390.4MB in the beginning and 390.3MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:20:22,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.71ms. Allocated memory is still 413.1MB. Free memory was 389.7MB in the beginning and 378.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 15:20:22,252 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.80ms. Allocated memory is still 413.1MB. Free memory was 378.1MB in the beginning and 376.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:20:22,252 INFO L158 Benchmark]: Boogie Preprocessor took 24.97ms. Allocated memory is still 413.1MB. Free memory was 376.0MB in the beginning and 374.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:20:22,252 INFO L158 Benchmark]: RCFGBuilder took 541.27ms. Allocated memory is still 413.1MB. Free memory was 374.2MB in the beginning and 339.1MB in the end (delta: 35.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-24 15:20:22,252 INFO L158 Benchmark]: TraceAbstraction took 831036.71ms. Allocated memory was 413.1MB in the beginning and 2.2GB in the end (delta: 1.7GB). Free memory was 390.7MB in the beginning and 1.0GB in the end (delta: -657.3MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. [2023-08-24 15:20:22,254 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 413.1MB. Free memory was 390.4MB in the beginning and 390.3MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 243.71ms. Allocated memory is still 413.1MB. Free memory was 389.7MB in the beginning and 378.1MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 41.80ms. Allocated memory is still 413.1MB. Free memory was 378.1MB in the beginning and 376.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.97ms. Allocated memory is still 413.1MB. Free memory was 376.0MB in the beginning and 374.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 541.27ms. Allocated memory is still 413.1MB. Free memory was 374.2MB in the beginning and 339.1MB in the end (delta: 35.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 831036.71ms. Allocated memory was 413.1MB in the beginning and 2.2GB in the end (delta: 1.7GB). Free memory was 390.7MB in the beginning and 1.0GB in the end (delta: -657.3MB). Peak memory consumption was 1.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 143 PlacesBefore, 22 PlacesAfterwards, 149 TransitionsBefore, 19 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 99 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 149 TotalNumberOfCompositions, 617 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 577, independent: 566, independent conditional: 0, independent unconditional: 566, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 298, independent: 293, independent conditional: 0, independent unconditional: 293, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 577, independent: 273, independent conditional: 0, independent unconditional: 273, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 298, unknown conditional: 0, unknown unconditional: 298] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 27ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 27ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 27ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 169 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: 830.9s, OverallIterations: 30, TraceHistogramMax: 2, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 13.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 885 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 885 mSDsluCounter, 167 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 94 IncrementalHoareTripleChecker+Unchecked, 94 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4771 IncrementalHoareTripleChecker+Invalid, 5015 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 73 mSDtfsCounter, 4771 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 910 GetRequests, 563 SyntacticMatches, 40 SemanticMatches, 307 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10691occurred in iteration=29, InterpolantAutomatonStates: 280, 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: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 878 NumberOfCodeBlocks, 859 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1138 ConstructedInterpolants, 16 QuantifiedInterpolants, 4263 SizeOfPredicates, 71 NumberOfNonLiveVariables, 3644 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 62 InterpolantComputations, 13 PerfectInterpolantSequences, 230/339 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown