/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:48:07,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:48:07,558 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 09:48:07,561 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:48:07,561 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:48:07,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:48:07,588 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:48:07,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:48:07,589 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:48:07,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:48:07,592 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:48:07,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:48:07,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:48:07,594 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:48:07,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:48:07,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:48:07,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:48:07,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:48:07,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:48:07,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:48:07,595 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:48:07,596 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:48:07,596 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:48:07,596 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:48:07,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:48:07,597 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:48:07,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:48:07,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:48:07,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:48:07,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:48:07,598 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:48:07,598 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:48:07,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:48:07,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:48:07,598 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:48:07,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:48:07,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:48:07,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:48:07,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:48:07,847 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:48:07,847 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:48:07,848 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-24 09:48:08,737 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:48:08,947 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:48:08,948 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-equiv.wvr.c [2023-08-24 09:48:08,955 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9c99fd8/4b9c9cf344c4445fb633a45930432031/FLAG4c7d6d5d6 [2023-08-24 09:48:08,971 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d9c99fd8/4b9c9cf344c4445fb633a45930432031 [2023-08-24 09:48:08,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:48:08,977 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:48:08,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:48:08,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:48:08,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:48:08,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:48:08" (1/1) ... [2023-08-24 09:48:08,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229d3125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:08, skipping insertion in model container [2023-08-24 09:48:08,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:48:08" (1/1) ... [2023-08-24 09:48:09,002 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:48:09,150 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-mult-equiv.wvr.c[2591,2604] [2023-08-24 09:48:09,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:48:09,161 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:48:09,193 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-mult-equiv.wvr.c[2591,2604] [2023-08-24 09:48:09,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:48:09,198 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:48:09,198 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:48:09,203 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:48:09,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09 WrapperNode [2023-08-24 09:48:09,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:48:09,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:48:09,204 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:48:09,204 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:48:09,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,225 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,243 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-24 09:48:09,243 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:48:09,244 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:48:09,244 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:48:09,244 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:48:09,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,255 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,268 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,270 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:48:09,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:48:09,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:48:09,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:48:09,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (1/1) ... [2023-08-24 09:48:09,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:48:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:09,324 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 09:48:09,329 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 09:48:09,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:48:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:48:09,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:48:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:48:09,360 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:48:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 09:48:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 09:48:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:48:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:48:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:48:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:48:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:48:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:48:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:48:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:48:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:48:09,363 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 09:48:09,467 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:48:09,468 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:48:09,701 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:48:09,747 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:48:09,748 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 09:48:09,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:48:09 BoogieIcfgContainer [2023-08-24 09:48:09,750 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:48:09,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:48:09,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:48:09,754 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:48:09,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:48:08" (1/3) ... [2023-08-24 09:48:09,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108d9edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:48:09, skipping insertion in model container [2023-08-24 09:48:09,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:48:09" (2/3) ... [2023-08-24 09:48:09,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108d9edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:48:09, skipping insertion in model container [2023-08-24 09:48:09,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:48:09" (3/3) ... [2023-08-24 09:48:09,757 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-08-24 09:48:09,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:48:09,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:48:09,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:48:09,845 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 09:48:09,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 94 transitions, 212 flow [2023-08-24 09:48:09,917 INFO L124 PetriNetUnfolderBase]: 7/91 cut-off events. [2023-08-24 09:48:09,917 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:48:09,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 91 events. 7/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-24 09:48:09,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 94 transitions, 212 flow [2023-08-24 09:48:09,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 81 transitions, 180 flow [2023-08-24 09:48:09,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:48:09,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-24 09:48:09,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 81 transitions, 180 flow [2023-08-24 09:48:09,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 81 transitions, 180 flow [2023-08-24 09:48:10,004 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-08-24 09:48:10,004 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:48:10,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 7/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-24 09:48:10,006 INFO L119 LiptonReduction]: Number of co-enabled transitions 860 [2023-08-24 09:48:11,822 INFO L134 LiptonReduction]: Checked pairs total: 1280 [2023-08-24 09:48:11,822 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-24 09:48:11,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:48:11,836 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;@5d199d57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:48:11,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 09:48:11,839 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:48:11,840 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-24 09:48:11,840 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 09:48:11,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:11,840 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 09:48:11,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:11,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201439, now seen corresponding path program 1 times [2023-08-24 09:48:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:11,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255715196] [2023-08-24 09:48:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:11,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:12,302 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 09:48:12,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:12,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255715196] [2023-08-24 09:48:12,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255715196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:48:12,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:48:12,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 09:48:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781992091] [2023-08-24 09:48:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:12,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:48:12,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:48:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:48:12,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 158 [2023-08-24 09:48:12,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 09:48:12,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:12,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 158 [2023-08-24 09:48:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:12,426 INFO L124 PetriNetUnfolderBase]: 271/426 cut-off events. [2023-08-24 09:48:12,426 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-24 09:48:12,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 426 events. 271/426 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1528 event pairs, 37 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 671. Up to 309 conditions per place. [2023-08-24 09:48:12,432 INFO L140 encePairwiseOnDemand]: 153/158 looper letters, 30 selfloop transitions, 4 changer transitions 1/39 dead transitions. [2023-08-24 09:48:12,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 181 flow [2023-08-24 09:48:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:48:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:48:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-24 09:48:12,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632911392405063 [2023-08-24 09:48:12,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-24 09:48:12,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-24 09:48:12,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:12,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-24 09:48:12,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 09:48:12,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 09:48:12,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 09:48:12,456 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 267 transitions. [2023-08-24 09:48:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 181 flow [2023-08-24 09:48:12,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 09:48:12,459 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 78 flow [2023-08-24 09:48:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-08-24 09:48:12,464 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-24 09:48:12,464 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 78 flow [2023-08-24 09:48:12,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 09:48:12,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:12,464 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 09:48:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:48:12,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:12,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1511050058, now seen corresponding path program 1 times [2023-08-24 09:48:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632958849] [2023-08-24 09:48:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:12,712 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 09:48:12,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:12,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632958849] [2023-08-24 09:48:12,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632958849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:48:12,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:48:12,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:48:12,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584181393] [2023-08-24 09:48:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:12,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 09:48:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 09:48:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-24 09:48:12,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 158 [2023-08-24 09:48:12,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 78 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:48:12,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:12,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 158 [2023-08-24 09:48:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:12,909 INFO L124 PetriNetUnfolderBase]: 459/707 cut-off events. [2023-08-24 09:48:12,909 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-24 09:48:12,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 707 events. 459/707 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2552 event pairs, 40 based on Foata normal form. 40/747 useless extension candidates. Maximal degree in co-relation 353. Up to 277 conditions per place. [2023-08-24 09:48:12,913 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 72 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2023-08-24 09:48:12,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 84 transitions, 395 flow [2023-08-24 09:48:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:48:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:48:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 560 transitions. [2023-08-24 09:48:12,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063291139240507 [2023-08-24 09:48:12,916 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 560 transitions. [2023-08-24 09:48:12,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 560 transitions. [2023-08-24 09:48:12,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:12,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 560 transitions. [2023-08-24 09:48:12,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 09:48:12,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:12,921 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:12,921 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 78 flow. Second operand 7 states and 560 transitions. [2023-08-24 09:48:12,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 84 transitions, 395 flow [2023-08-24 09:48:12,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 84 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:48:12,924 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 154 flow [2023-08-24 09:48:12,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-08-24 09:48:12,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-08-24 09:48:12,925 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 154 flow [2023-08-24 09:48:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:48:12,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:12,928 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 09:48:12,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:48:12,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:12,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2072907592, now seen corresponding path program 2 times [2023-08-24 09:48:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935468937] [2023-08-24 09:48:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:13,109 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 09:48:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935468937] [2023-08-24 09:48:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935468937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:48:13,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:48:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:48:13,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256303626] [2023-08-24 09:48:13,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:48:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:48:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:48:13,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 158 [2023-08-24 09:48:13,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:48:13,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:13,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 158 [2023-08-24 09:48:13,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:13,347 INFO L124 PetriNetUnfolderBase]: 947/1447 cut-off events. [2023-08-24 09:48:13,347 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2023-08-24 09:48:13,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 1447 events. 947/1447 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6100 event pairs, 99 based on Foata normal form. 24/1471 useless extension candidates. Maximal degree in co-relation 2968. Up to 478 conditions per place. [2023-08-24 09:48:13,353 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 96 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2023-08-24 09:48:13,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 115 transitions, 646 flow [2023-08-24 09:48:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:48:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:48:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 578 transitions. [2023-08-24 09:48:13,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226039783001808 [2023-08-24 09:48:13,354 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 578 transitions. [2023-08-24 09:48:13,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 578 transitions. [2023-08-24 09:48:13,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:13,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 578 transitions. [2023-08-24 09:48:13,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.57142857142857) internal successors, (578), 7 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 09:48:13,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:13,357 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:13,358 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 154 flow. Second operand 7 states and 578 transitions. [2023-08-24 09:48:13,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 115 transitions, 646 flow [2023-08-24 09:48:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 115 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 09:48:13,364 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 308 flow [2023-08-24 09:48:13,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=308, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-24 09:48:13,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-08-24 09:48:13,368 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 308 flow [2023-08-24 09:48:13,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:48:13,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:13,368 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 09:48:13,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 09:48:13,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:13,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2012888634, now seen corresponding path program 3 times [2023-08-24 09:48:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:13,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384059695] [2023-08-24 09:48:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:13,480 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 09:48:13,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384059695] [2023-08-24 09:48:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384059695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7206684] [2023-08-24 09:48:13,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:48:13,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:13,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:13,483 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 09:48:13,527 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 09:48:13,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:48:13,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:13,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 09:48:13,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:13,628 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 09:48:13,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:13,700 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 09:48:13,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7206684] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:13,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:48:13,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-08-24 09:48:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587925266] [2023-08-24 09:48:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:13,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:48:13,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:48:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-24 09:48:13,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 158 [2023-08-24 09:48:13,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:48:13,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:13,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 158 [2023-08-24 09:48:13,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:13,959 INFO L124 PetriNetUnfolderBase]: 1079/1685 cut-off events. [2023-08-24 09:48:13,959 INFO L125 PetriNetUnfolderBase]: For 4174/4174 co-relation queries the response was YES. [2023-08-24 09:48:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6157 conditions, 1685 events. 1079/1685 cut-off events. For 4174/4174 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7517 event pairs, 185 based on Foata normal form. 30/1715 useless extension candidates. Maximal degree in co-relation 4517. Up to 695 conditions per place. [2023-08-24 09:48:13,967 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 70 selfloop transitions, 30 changer transitions 0/100 dead transitions. [2023-08-24 09:48:13,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 745 flow [2023-08-24 09:48:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:48:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:48:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 09:48:13,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027124773960217 [2023-08-24 09:48:13,969 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 09:48:13,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 09:48:13,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:13,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 09:48:13,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 09:48:13,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:13,972 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:13,972 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 308 flow. Second operand 7 states and 556 transitions. [2023-08-24 09:48:13,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 745 flow [2023-08-24 09:48:13,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 741 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 09:48:13,979 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 530 flow [2023-08-24 09:48:13,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-24 09:48:13,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2023-08-24 09:48:13,979 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 530 flow [2023-08-24 09:48:13,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 09:48:13,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:13,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:13,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 09:48:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:14,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:14,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1229482461, now seen corresponding path program 1 times [2023-08-24 09:48:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844387108] [2023-08-24 09:48:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:14,386 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 09:48:14,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844387108] [2023-08-24 09:48:14,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844387108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649259411] [2023-08-24 09:48:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:14,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:14,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:14,401 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 09:48:14,413 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 09:48:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:14,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:48:14,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:14,648 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 09:48:14,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:14,783 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 09:48:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649259411] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:14,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 09:48:14,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 11 [2023-08-24 09:48:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084574955] [2023-08-24 09:48:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:48:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:14,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:48:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:48:14,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-24 09:48:14,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 530 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 09:48:14,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:14,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-24 09:48:14,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:15,158 INFO L124 PetriNetUnfolderBase]: 1352/2108 cut-off events. [2023-08-24 09:48:15,158 INFO L125 PetriNetUnfolderBase]: For 8573/8573 co-relation queries the response was YES. [2023-08-24 09:48:15,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9334 conditions, 2108 events. 1352/2108 cut-off events. For 8573/8573 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9990 event pairs, 59 based on Foata normal form. 12/2120 useless extension candidates. Maximal degree in co-relation 7191. Up to 1155 conditions per place. [2023-08-24 09:48:15,171 INFO L140 encePairwiseOnDemand]: 147/158 looper letters, 108 selfloop transitions, 50 changer transitions 7/165 dead transitions. [2023-08-24 09:48:15,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 165 transitions, 1512 flow [2023-08-24 09:48:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:48:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:48:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 710 transitions. [2023-08-24 09:48:15,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49929676511954996 [2023-08-24 09:48:15,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 710 transitions. [2023-08-24 09:48:15,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 710 transitions. [2023-08-24 09:48:15,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:15,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 710 transitions. [2023-08-24 09:48:15,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.88888888888889) internal successors, (710), 9 states have internal predecessors, (710), 0 states have call successors, (0), 0 states 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 09:48:15,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 09:48:15,176 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 09:48:15,176 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 530 flow. Second operand 9 states and 710 transitions. [2023-08-24 09:48:15,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 165 transitions, 1512 flow [2023-08-24 09:48:15,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 165 transitions, 1472 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-08-24 09:48:15,194 INFO L231 Difference]: Finished difference. Result has 72 places, 95 transitions, 1085 flow [2023-08-24 09:48:15,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1085, PETRI_PLACES=72, PETRI_TRANSITIONS=95} [2023-08-24 09:48:15,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-08-24 09:48:15,195 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 95 transitions, 1085 flow [2023-08-24 09:48:15,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 09:48:15,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:15,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:15,200 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 09:48:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:15,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:15,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1535702041, now seen corresponding path program 1 times [2023-08-24 09:48:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:15,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655455289] [2023-08-24 09:48:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:15,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:15,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655455289] [2023-08-24 09:48:15,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655455289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:48:15,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:48:15,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:48:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033752299] [2023-08-24 09:48:15,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:15,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:48:15,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:15,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:48:15,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:48:15,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2023-08-24 09:48:15,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 95 transitions, 1085 flow. Second operand has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 09:48:15,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:15,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2023-08-24 09:48:15,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:15,939 INFO L124 PetriNetUnfolderBase]: 1750/2767 cut-off events. [2023-08-24 09:48:15,940 INFO L125 PetriNetUnfolderBase]: For 21102/21102 co-relation queries the response was YES. [2023-08-24 09:48:15,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14773 conditions, 2767 events. 1750/2767 cut-off events. For 21102/21102 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14158 event pairs, 330 based on Foata normal form. 36/2803 useless extension candidates. Maximal degree in co-relation 13563. Up to 1246 conditions per place. [2023-08-24 09:48:15,960 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 150 selfloop transitions, 70 changer transitions 10/230 dead transitions. [2023-08-24 09:48:15,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 230 transitions, 2913 flow [2023-08-24 09:48:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:48:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:48:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2023-08-24 09:48:15,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221518987341772 [2023-08-24 09:48:15,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2023-08-24 09:48:15,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2023-08-24 09:48:15,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:15,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2023-08-24 09:48:15,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states 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 09:48:15,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 09:48:15,964 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 09:48:15,964 INFO L175 Difference]: Start difference. First operand has 72 places, 95 transitions, 1085 flow. Second operand 6 states and 495 transitions. [2023-08-24 09:48:15,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 230 transitions, 2913 flow [2023-08-24 09:48:15,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 230 transitions, 2830 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-08-24 09:48:15,995 INFO L231 Difference]: Finished difference. Result has 80 places, 152 transitions, 2083 flow [2023-08-24 09:48:15,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2083, PETRI_PLACES=80, PETRI_TRANSITIONS=152} [2023-08-24 09:48:15,996 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-08-24 09:48:15,996 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 152 transitions, 2083 flow [2023-08-24 09:48:15,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 09:48:15,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:15,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:15,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 09:48:15,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:15,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 125532181, now seen corresponding path program 2 times [2023-08-24 09:48:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:15,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181087945] [2023-08-24 09:48:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:16,109 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 09:48:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181087945] [2023-08-24 09:48:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181087945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473270468] [2023-08-24 09:48:16,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:48:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:16,110 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 09:48:16,163 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 09:48:16,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:48:16,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:16,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:48:16,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:16,305 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 09:48:16,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:16,409 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 09:48:16,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473270468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:16,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:16,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-24 09:48:16,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286254463] [2023-08-24 09:48:16,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 09:48:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 09:48:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-24 09:48:16,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 158 [2023-08-24 09:48:16,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 152 transitions, 2083 flow. Second operand has 11 states, 11 states have (on average 70.45454545454545) internal successors, (775), 11 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 09:48:16,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:16,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 158 [2023-08-24 09:48:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:16,935 INFO L124 PetriNetUnfolderBase]: 2463/3841 cut-off events. [2023-08-24 09:48:16,935 INFO L125 PetriNetUnfolderBase]: For 32755/32755 co-relation queries the response was YES. [2023-08-24 09:48:16,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23705 conditions, 3841 events. 2463/3841 cut-off events. For 32755/32755 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20255 event pairs, 199 based on Foata normal form. 91/3932 useless extension candidates. Maximal degree in co-relation 20193. Up to 1970 conditions per place. [2023-08-24 09:48:16,973 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 230 selfloop transitions, 52 changer transitions 8/290 dead transitions. [2023-08-24 09:48:16,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 290 transitions, 4225 flow [2023-08-24 09:48:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 09:48:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 09:48:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2023-08-24 09:48:16,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49909584086799275 [2023-08-24 09:48:16,975 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 552 transitions. [2023-08-24 09:48:16,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 552 transitions. [2023-08-24 09:48:16,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:16,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 552 transitions. [2023-08-24 09:48:16,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states 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 09:48:16,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:16,977 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states 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 09:48:16,977 INFO L175 Difference]: Start difference. First operand has 80 places, 152 transitions, 2083 flow. Second operand 7 states and 552 transitions. [2023-08-24 09:48:16,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 290 transitions, 4225 flow [2023-08-24 09:48:17,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 290 transitions, 4105 flow, removed 60 selfloop flow, removed 0 redundant places. [2023-08-24 09:48:17,057 INFO L231 Difference]: Finished difference. Result has 89 places, 176 transitions, 2604 flow [2023-08-24 09:48:17,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2604, PETRI_PLACES=89, PETRI_TRANSITIONS=176} [2023-08-24 09:48:17,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2023-08-24 09:48:17,058 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 176 transitions, 2604 flow [2023-08-24 09:48:17,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 70.45454545454545) internal successors, (775), 11 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 09:48:17,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:17,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:17,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 09:48:17,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:17,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:17,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1951789929, now seen corresponding path program 2 times [2023-08-24 09:48:17,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:17,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582840449] [2023-08-24 09:48:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:17,409 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 09:48:17,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:17,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582840449] [2023-08-24 09:48:17,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582840449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:48:17,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:48:17,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 09:48:17,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133189451] [2023-08-24 09:48:17,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:48:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 09:48:17,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 09:48:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 09:48:17,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2023-08-24 09:48:17,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 176 transitions, 2604 flow. Second operand has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 09:48:17,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:17,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2023-08-24 09:48:17,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:17,954 INFO L124 PetriNetUnfolderBase]: 2921/4690 cut-off events. [2023-08-24 09:48:17,954 INFO L125 PetriNetUnfolderBase]: For 49187/49187 co-relation queries the response was YES. [2023-08-24 09:48:17,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29534 conditions, 4690 events. 2921/4690 cut-off events. For 49187/49187 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26913 event pairs, 747 based on Foata normal form. 72/4762 useless extension candidates. Maximal degree in co-relation 26028. Up to 2341 conditions per place. [2023-08-24 09:48:17,999 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 150 selfloop transitions, 102 changer transitions 6/258 dead transitions. [2023-08-24 09:48:17,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 258 transitions, 4063 flow [2023-08-24 09:48:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 09:48:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 09:48:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-08-24 09:48:18,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265822784810127 [2023-08-24 09:48:18,001 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-08-24 09:48:18,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-08-24 09:48:18,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:18,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-08-24 09:48:18,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:48:18,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 09:48:18,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 09:48:18,003 INFO L175 Difference]: Start difference. First operand has 89 places, 176 transitions, 2604 flow. Second operand 5 states and 416 transitions. [2023-08-24 09:48:18,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 258 transitions, 4063 flow [2023-08-24 09:48:18,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 258 transitions, 3960 flow, removed 38 selfloop flow, removed 2 redundant places. [2023-08-24 09:48:18,121 INFO L231 Difference]: Finished difference. Result has 94 places, 191 transitions, 3162 flow [2023-08-24 09:48:18,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3162, PETRI_PLACES=94, PETRI_TRANSITIONS=191} [2023-08-24 09:48:18,122 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2023-08-24 09:48:18,122 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 191 transitions, 3162 flow [2023-08-24 09:48:18,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 09:48:18,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:18,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:18,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 09:48:18,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:18,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1119355907, now seen corresponding path program 3 times [2023-08-24 09:48:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:18,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027953525] [2023-08-24 09:48:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:18,288 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 09:48:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:18,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027953525] [2023-08-24 09:48:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027953525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:18,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221795096] [2023-08-24 09:48:18,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:48:18,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:18,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:18,289 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 09:48:18,291 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 09:48:18,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:48:18,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:18,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:48:18,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:18,423 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 09:48:18,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:18,580 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 09:48:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221795096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:18,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-08-24 09:48:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444589250] [2023-08-24 09:48:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 09:48:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 09:48:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-24 09:48:18,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2023-08-24 09:48:18,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 191 transitions, 3162 flow. Second operand has 11 states, 11 states have (on average 68.45454545454545) internal successors, (753), 11 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 09:48:18,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:18,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2023-08-24 09:48:18,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:20,028 INFO L124 PetriNetUnfolderBase]: 4751/7627 cut-off events. [2023-08-24 09:48:20,029 INFO L125 PetriNetUnfolderBase]: For 89665/89665 co-relation queries the response was YES. [2023-08-24 09:48:20,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51300 conditions, 7627 events. 4751/7627 cut-off events. For 89665/89665 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47565 event pairs, 316 based on Foata normal form. 167/7794 useless extension candidates. Maximal degree in co-relation 44325. Up to 2138 conditions per place. [2023-08-24 09:48:20,178 INFO L140 encePairwiseOnDemand]: 147/158 looper letters, 270 selfloop transitions, 229 changer transitions 89/588 dead transitions. [2023-08-24 09:48:20,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 588 transitions, 8960 flow [2023-08-24 09:48:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:48:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:48:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1589 transitions. [2023-08-24 09:48:20,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47890295358649787 [2023-08-24 09:48:20,182 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1589 transitions. [2023-08-24 09:48:20,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1589 transitions. [2023-08-24 09:48:20,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:20,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1589 transitions. [2023-08-24 09:48:20,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 75.66666666666667) internal successors, (1589), 21 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 09:48:20,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states 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 09:48:20,189 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states 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 09:48:20,189 INFO L175 Difference]: Start difference. First operand has 94 places, 191 transitions, 3162 flow. Second operand 21 states and 1589 transitions. [2023-08-24 09:48:20,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 588 transitions, 8960 flow [2023-08-24 09:48:20,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 588 transitions, 8673 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-08-24 09:48:20,445 INFO L231 Difference]: Finished difference. Result has 126 places, 308 transitions, 5948 flow [2023-08-24 09:48:20,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5948, PETRI_PLACES=126, PETRI_TRANSITIONS=308} [2023-08-24 09:48:20,445 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2023-08-24 09:48:20,446 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 308 transitions, 5948 flow [2023-08-24 09:48:20,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 68.45454545454545) internal successors, (753), 11 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 09:48:20,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:20,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:20,451 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 09:48:20,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:20,651 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:20,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:20,651 INFO L85 PathProgramCache]: Analyzing trace with hash 693870644, now seen corresponding path program 1 times [2023-08-24 09:48:20,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:20,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859407207] [2023-08-24 09:48:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:20,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:20,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859407207] [2023-08-24 09:48:20,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859407207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:20,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443553155] [2023-08-24 09:48:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:20,869 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 09:48:20,871 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 09:48:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:20,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:48:20,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:21,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:21,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443553155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:21,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:21,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-24 09:48:21,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94538289] [2023-08-24 09:48:21,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:21,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:48:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:48:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:48:21,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2023-08-24 09:48:21,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 308 transitions, 5948 flow. Second operand has 12 states, 12 states have (on average 68.25) internal successors, (819), 12 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 09:48:21,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:21,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2023-08-24 09:48:21,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:23,895 INFO L124 PetriNetUnfolderBase]: 5704/9262 cut-off events. [2023-08-24 09:48:23,895 INFO L125 PetriNetUnfolderBase]: For 153472/153472 co-relation queries the response was YES. [2023-08-24 09:48:23,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70154 conditions, 9262 events. 5704/9262 cut-off events. For 153472/153472 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60424 event pairs, 404 based on Foata normal form. 8/9270 useless extension candidates. Maximal degree in co-relation 65121. Up to 5358 conditions per place. [2023-08-24 09:48:23,987 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 376 selfloop transitions, 193 changer transitions 5/574 dead transitions. [2023-08-24 09:48:23,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 574 transitions, 11440 flow [2023-08-24 09:48:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 09:48:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 09:48:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 682 transitions. [2023-08-24 09:48:23,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47960618846694797 [2023-08-24 09:48:23,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 682 transitions. [2023-08-24 09:48:23,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 682 transitions. [2023-08-24 09:48:23,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:23,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 682 transitions. [2023-08-24 09:48:23,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.77777777777777) internal successors, (682), 9 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 09:48:23,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 09:48:23,992 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 09:48:23,992 INFO L175 Difference]: Start difference. First operand has 126 places, 308 transitions, 5948 flow. Second operand 9 states and 682 transitions. [2023-08-24 09:48:23,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 574 transitions, 11440 flow [2023-08-24 09:48:24,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 574 transitions, 10527 flow, removed 398 selfloop flow, removed 12 redundant places. [2023-08-24 09:48:24,569 INFO L231 Difference]: Finished difference. Result has 122 places, 419 transitions, 8443 flow [2023-08-24 09:48:24,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8443, PETRI_PLACES=122, PETRI_TRANSITIONS=419} [2023-08-24 09:48:24,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2023-08-24 09:48:24,570 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 419 transitions, 8443 flow [2023-08-24 09:48:24,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 68.25) internal successors, (819), 12 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 09:48:24,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:24,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:24,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 09:48:24,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 09:48:24,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:24,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:24,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1627485648, now seen corresponding path program 2 times [2023-08-24 09:48:24,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:24,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456603963] [2023-08-24 09:48:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:24,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456603963] [2023-08-24 09:48:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456603963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717530900] [2023-08-24 09:48:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:48:24,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:24,993 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 09:48:24,994 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 09:48:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:48:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:25,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:48:25,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:25,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717530900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:25,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:25,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2023-08-24 09:48:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054584343] [2023-08-24 09:48:25,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 09:48:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 09:48:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-24 09:48:25,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 158 [2023-08-24 09:48:25,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 419 transitions, 8443 flow. Second operand has 12 states, 12 states have (on average 68.25) internal successors, (819), 12 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 09:48:25,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:25,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 158 [2023-08-24 09:48:25,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:27,545 INFO L124 PetriNetUnfolderBase]: 6242/10094 cut-off events. [2023-08-24 09:48:27,546 INFO L125 PetriNetUnfolderBase]: For 164692/164692 co-relation queries the response was YES. [2023-08-24 09:48:27,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76186 conditions, 10094 events. 6242/10094 cut-off events. For 164692/164692 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 66614 event pairs, 604 based on Foata normal form. 8/10102 useless extension candidates. Maximal degree in co-relation 72345. Up to 7372 conditions per place. [2023-08-24 09:48:27,607 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 402 selfloop transitions, 196 changer transitions 6/604 dead transitions. [2023-08-24 09:48:27,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 604 transitions, 12526 flow [2023-08-24 09:48:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:48:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:48:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 803 transitions. [2023-08-24 09:48:27,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620253164556962 [2023-08-24 09:48:27,610 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 803 transitions. [2023-08-24 09:48:27,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 803 transitions. [2023-08-24 09:48:27,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:27,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 803 transitions. [2023-08-24 09:48:27,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 73.0) internal successors, (803), 11 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 09:48:27,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states 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 09:48:27,613 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 158.0) internal successors, (1896), 12 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states 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 09:48:27,613 INFO L175 Difference]: Start difference. First operand has 122 places, 419 transitions, 8443 flow. Second operand 11 states and 803 transitions. [2023-08-24 09:48:27,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 604 transitions, 12526 flow [2023-08-24 09:48:28,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 604 transitions, 11943 flow, removed 282 selfloop flow, removed 2 redundant places. [2023-08-24 09:48:28,264 INFO L231 Difference]: Finished difference. Result has 135 places, 501 transitions, 10290 flow [2023-08-24 09:48:28,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10290, PETRI_PLACES=135, PETRI_TRANSITIONS=501} [2023-08-24 09:48:28,265 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2023-08-24 09:48:28,265 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 501 transitions, 10290 flow [2023-08-24 09:48:28,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 68.25) internal successors, (819), 12 states have internal predecessors, (819), 0 states have call successors, (0), 0 states 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 09:48:28,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:28,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:28,272 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 09:48:28,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:28,470 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:28,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -994462518, now seen corresponding path program 1 times [2023-08-24 09:48:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:28,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935228202] [2023-08-24 09:48:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:28,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:28,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:28,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935228202] [2023-08-24 09:48:28,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935228202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:28,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506582971] [2023-08-24 09:48:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:28,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:28,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:28,762 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 09:48:28,764 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 09:48:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:28,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:48:28,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:29,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:29,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506582971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:29,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:29,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 20 [2023-08-24 09:48:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988051438] [2023-08-24 09:48:29,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:29,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:48:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:48:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:48:29,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-24 09:48:29,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 501 transitions, 10290 flow. Second operand has 21 states, 21 states have (on average 68.33333333333333) internal successors, (1435), 21 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 09:48:29,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:29,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-24 09:48:29,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:36,566 INFO L124 PetriNetUnfolderBase]: 12930/20430 cut-off events. [2023-08-24 09:48:36,566 INFO L125 PetriNetUnfolderBase]: For 409575/409575 co-relation queries the response was YES. [2023-08-24 09:48:36,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157300 conditions, 20430 events. 12930/20430 cut-off events. For 409575/409575 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 144735 event pairs, 186 based on Foata normal form. 1516/21946 useless extension candidates. Maximal degree in co-relation 157244. Up to 5213 conditions per place. [2023-08-24 09:48:36,833 INFO L140 encePairwiseOnDemand]: 147/158 looper letters, 681 selfloop transitions, 1648 changer transitions 0/2329 dead transitions. [2023-08-24 09:48:36,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 2329 transitions, 41837 flow [2023-08-24 09:48:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-24 09:48:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-24 09:48:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 6659 transitions. [2023-08-24 09:48:36,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844318347155536 [2023-08-24 09:48:36,844 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 6659 transitions. [2023-08-24 09:48:36,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 6659 transitions. [2023-08-24 09:48:36,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:36,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 6659 transitions. [2023-08-24 09:48:36,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 76.54022988505747) internal successors, (6659), 87 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states 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 09:48:36,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 158.0) internal successors, (13904), 88 states have internal predecessors, (13904), 0 states have call successors, (0), 0 states 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 09:48:36,873 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 158.0) internal successors, (13904), 88 states have internal predecessors, (13904), 0 states have call successors, (0), 0 states 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 09:48:36,873 INFO L175 Difference]: Start difference. First operand has 135 places, 501 transitions, 10290 flow. Second operand 87 states and 6659 transitions. [2023-08-24 09:48:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 2329 transitions, 41837 flow [2023-08-24 09:48:38,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 2329 transitions, 40668 flow, removed 574 selfloop flow, removed 6 redundant places. [2023-08-24 09:48:39,014 INFO L231 Difference]: Finished difference. Result has 253 places, 1781 transitions, 39288 flow [2023-08-24 09:48:39,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=8141, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=39288, PETRI_PLACES=253, PETRI_TRANSITIONS=1781} [2023-08-24 09:48:39,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2023-08-24 09:48:39,015 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 1781 transitions, 39288 flow [2023-08-24 09:48:39,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.33333333333333) internal successors, (1435), 21 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states 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 09:48:39,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:48:39,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:48:39,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 09:48:39,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:39,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:48:39,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:48:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1240215054, now seen corresponding path program 2 times [2023-08-24 09:48:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:48:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204591070] [2023-08-24 09:48:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:48:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:48:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:48:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:39,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:48:39,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204591070] [2023-08-24 09:48:39,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204591070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:48:39,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184323699] [2023-08-24 09:48:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:48:39,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:48:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:48:39,403 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 09:48:39,429 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 09:48:39,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:48:39,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:48:39,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 09:48:39,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:48:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:39,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:48:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:48:39,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184323699] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:48:39,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:48:39,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-24 09:48:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583627817] [2023-08-24 09:48:39,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:48:39,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:48:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:48:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:48:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:48:39,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-24 09:48:39,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1781 transitions, 39288 flow. Second operand has 20 states, 20 states have (on average 68.45) internal successors, (1369), 20 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states 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 09:48:39,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:48:39,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-24 09:48:39,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:48:57,857 INFO L124 PetriNetUnfolderBase]: 23279/37437 cut-off events. [2023-08-24 09:48:57,858 INFO L125 PetriNetUnfolderBase]: For 1101888/1101888 co-relation queries the response was YES. [2023-08-24 09:48:58,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350006 conditions, 37437 events. 23279/37437 cut-off events. For 1101888/1101888 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 296933 event pairs, 417 based on Foata normal form. 936/38373 useless extension candidates. Maximal degree in co-relation 349910. Up to 9517 conditions per place. [2023-08-24 09:48:58,746 INFO L140 encePairwiseOnDemand]: 146/158 looper letters, 1623 selfloop transitions, 2895 changer transitions 0/4518 dead transitions. [2023-08-24 09:48:58,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 4518 transitions, 103062 flow [2023-08-24 09:48:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-24 09:48:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-24 09:48:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 5363 transitions. [2023-08-24 09:48:58,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849005424954792 [2023-08-24 09:48:58,752 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 5363 transitions. [2023-08-24 09:48:58,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 5363 transitions. [2023-08-24 09:48:58,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:48:58,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 5363 transitions. [2023-08-24 09:48:58,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 76.61428571428571) internal successors, (5363), 70 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states 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 09:48:58,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 158.0) internal successors, (11218), 71 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states 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 09:48:58,769 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 158.0) internal successors, (11218), 71 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states 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 09:48:58,770 INFO L175 Difference]: Start difference. First operand has 253 places, 1781 transitions, 39288 flow. Second operand 70 states and 5363 transitions. [2023-08-24 09:48:58,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 4518 transitions, 103062 flow [2023-08-24 09:49:24,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 4518 transitions, 90703 flow, removed 5786 selfloop flow, removed 7 redundant places. [2023-08-24 09:49:24,798 INFO L231 Difference]: Finished difference. Result has 359 places, 3832 transitions, 84741 flow [2023-08-24 09:49:24,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=33061, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=84741, PETRI_PLACES=359, PETRI_TRANSITIONS=3832} [2023-08-24 09:49:24,800 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2023-08-24 09:49:24,800 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 3832 transitions, 84741 flow [2023-08-24 09:49:24,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 68.45) internal successors, (1369), 20 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states 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 09:49:24,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:49:24,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:49:24,822 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 09:49:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 09:49:25,006 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:49:25,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:49:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 913127508, now seen corresponding path program 3 times [2023-08-24 09:49:25,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:49:25,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906949498] [2023-08-24 09:49:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:49:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:49:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:49:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:25,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:49:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906949498] [2023-08-24 09:49:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906949498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:49:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177081577] [2023-08-24 09:49:25,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:49:25,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:49:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:49:25,119 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 09:49:25,121 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 09:49:25,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:49:25,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:49:25,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:49:25,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:49:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:25,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:49:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:49:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177081577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:49:25,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:49:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 16 [2023-08-24 09:49:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384397377] [2023-08-24 09:49:25,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:49:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 09:49:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:49:25,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 09:49:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-08-24 09:49:25,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-24 09:49:25,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 3832 transitions, 84741 flow. Second operand has 17 states, 17 states have (on average 68.3529411764706) internal successors, (1162), 17 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 09:49:25,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:49:25,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-24 09:49:25,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:50:21,251 INFO L124 PetriNetUnfolderBase]: 37843/62479 cut-off events. [2023-08-24 09:50:21,252 INFO L125 PetriNetUnfolderBase]: For 2244488/2244488 co-relation queries the response was YES. [2023-08-24 09:50:23,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601162 conditions, 62479 events. 37843/62479 cut-off events. For 2244488/2244488 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 553153 event pairs, 528 based on Foata normal form. 1046/63525 useless extension candidates. Maximal degree in co-relation 601027. Up to 12149 conditions per place. [2023-08-24 09:50:23,451 INFO L140 encePairwiseOnDemand]: 147/158 looper letters, 1534 selfloop transitions, 6374 changer transitions 0/7908 dead transitions. [2023-08-24 09:50:23,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 7908 transitions, 192235 flow [2023-08-24 09:50:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-24 09:50:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-24 09:50:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5632 transitions. [2023-08-24 09:50:23,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527426160337555 [2023-08-24 09:50:23,457 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5632 transitions. [2023-08-24 09:50:23,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5632 transitions. [2023-08-24 09:50:23,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:50:23,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5632 transitions. [2023-08-24 09:50:23,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 75.09333333333333) internal successors, (5632), 75 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states 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 09:50:23,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 158.0) internal successors, (12008), 76 states have internal predecessors, (12008), 0 states have call successors, (0), 0 states 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 09:50:23,472 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 158.0) internal successors, (12008), 76 states have internal predecessors, (12008), 0 states have call successors, (0), 0 states 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 09:50:23,472 INFO L175 Difference]: Start difference. First operand has 359 places, 3832 transitions, 84741 flow. Second operand 75 states and 5632 transitions. [2023-08-24 09:50:23,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 7908 transitions, 192235 flow [2023-08-24 09:52:37,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 7908 transitions, 182024 flow, removed 5065 selfloop flow, removed 2 redundant places. [2023-08-24 09:52:37,548 INFO L231 Difference]: Finished difference. Result has 488 places, 7228 transitions, 181774 flow [2023-08-24 09:52:37,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=80279, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=181774, PETRI_PLACES=488, PETRI_TRANSITIONS=7228} [2023-08-24 09:52:37,550 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 458 predicate places. [2023-08-24 09:52:37,550 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 7228 transitions, 181774 flow [2023-08-24 09:52:37,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 68.3529411764706) internal successors, (1162), 17 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states 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 09:52:37,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:37,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:37,579 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 09:52:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 09:52:37,758 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 09:52:37,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash 283146836, now seen corresponding path program 4 times [2023-08-24 09:52:37,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:37,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206427210] [2023-08-24 09:52:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:37,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:37,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206427210] [2023-08-24 09:52:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206427210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351368214] [2023-08-24 09:52:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:52:37,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:37,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:37,906 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 09:52:37,909 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 09:52:37,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:52:37,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:37,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 09:52:37,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:38,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351368214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:38,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-08-24 09:52:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230914972] [2023-08-24 09:52:38,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:38,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:52:38,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:52:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:52:38,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2023-08-24 09:52:38,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 7228 transitions, 181774 flow. Second operand has 20 states, 20 states have (on average 68.45) internal successors, (1369), 20 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states 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 09:52:38,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:38,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2023-08-24 09:52:38,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:56:11,251 INFO L124 PetriNetUnfolderBase]: 67859/115312 cut-off events. [2023-08-24 09:56:11,251 INFO L125 PetriNetUnfolderBase]: For 5438769/5438769 co-relation queries the response was YES. [2023-08-24 09:56:16,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222760 conditions, 115312 events. 67859/115312 cut-off events. For 5438769/5438769 co-relation queries the response was YES. Maximal size of possible extension queue 6145. Compared 1139650 event pairs, 1615 based on Foata normal form. 1960/117272 useless extension candidates. Maximal degree in co-relation 1222570. Up to 22433 conditions per place. [2023-08-24 09:56:16,984 INFO L140 encePairwiseOnDemand]: 147/158 looper letters, 4667 selfloop transitions, 10218 changer transitions 3/14888 dead transitions. [2023-08-24 09:56:16,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 14888 transitions, 401841 flow [2023-08-24 09:56:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-24 09:56:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-24 09:56:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5892 transitions. [2023-08-24 09:56:17,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843005096169653 [2023-08-24 09:56:17,010 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5892 transitions. [2023-08-24 09:56:17,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5892 transitions. [2023-08-24 09:56:17,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:56:17,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5892 transitions. [2023-08-24 09:56:17,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 76.51948051948052) internal successors, (5892), 77 states have internal predecessors, (5892), 0 states have call successors, (0), 0 states 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 09:56:17,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 158.0) internal successors, (12324), 78 states have internal predecessors, (12324), 0 states have call successors, (0), 0 states 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 09:56:17,047 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 158.0) internal successors, (12324), 78 states have internal predecessors, (12324), 0 states have call successors, (0), 0 states 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 09:56:17,047 INFO L175 Difference]: Start difference. First operand has 488 places, 7228 transitions, 181774 flow. Second operand 77 states and 5892 transitions. [2023-08-24 09:56:17,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 14888 transitions, 401841 flow Received shutdown request... [2023-08-24 10:00:37,394 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 10:00:37,402 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 10:00:37,406 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 10:00:37,406 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:00:37,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 10:00:37,600 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 10:00:37,601 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 10:00:37,601 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 10:00:37,601 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 10:00:37,601 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 3, 2, 2, 1] [2023-08-24 10:00:37,603 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 10:00:37,603 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 10:00:37,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 10:00:37 BasicIcfg [2023-08-24 10:00:37,605 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 10:00:37,605 INFO L158 Benchmark]: Toolchain (without parser) took 748628.82ms. Allocated memory was 390.1MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 367.5MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2023-08-24 10:00:37,607 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 390.1MB. Free memory is still 366.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:00:37,607 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.70ms. Allocated memory is still 390.1MB. Free memory was 367.2MB in the beginning and 355.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 10:00:37,607 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.13ms. Allocated memory is still 390.1MB. Free memory was 355.8MB in the beginning and 354.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:00:37,607 INFO L158 Benchmark]: Boogie Preprocessor took 29.21ms. Allocated memory is still 390.1MB. Free memory was 354.2MB in the beginning and 352.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:00:37,607 INFO L158 Benchmark]: RCFGBuilder took 476.32ms. Allocated memory is still 390.1MB. Free memory was 352.8MB in the beginning and 336.4MB in the end (delta: 16.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 10:00:37,607 INFO L158 Benchmark]: TraceAbstraction took 747853.43ms. Allocated memory was 390.1MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 335.7MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. [2023-08-24 10:00:37,608 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 390.1MB. Free memory is still 366.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 224.70ms. Allocated memory is still 390.1MB. Free memory was 367.2MB in the beginning and 355.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.13ms. Allocated memory is still 390.1MB. Free memory was 355.8MB in the beginning and 354.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.21ms. Allocated memory is still 390.1MB. Free memory was 354.2MB in the beginning and 352.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 476.32ms. Allocated memory is still 390.1MB. Free memory was 352.8MB in the beginning and 336.4MB in the end (delta: 16.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 747853.43ms. Allocated memory was 390.1MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 335.7MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 84 PlacesBefore, 30 PlacesAfterwards, 81 TransitionsBefore, 23 TransitionsAfterwards, 860 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 1280 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1089, independent: 1063, independent conditional: 0, independent unconditional: 1063, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 441, independent: 436, independent conditional: 0, independent unconditional: 436, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1089, independent: 627, independent conditional: 0, independent unconditional: 627, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 441, unknown conditional: 0, unknown unconditional: 441] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 110 locations, 4 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: 747.7s, OverallIterations: 15, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 736.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2689 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2689 mSDsluCounter, 91 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 491 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10045 IncrementalHoareTripleChecker+Invalid, 10536 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 491 mSolverCounterUnsat, 42 mSDtfsCounter, 10045 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 756 GetRequests, 322 SyntacticMatches, 7 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9911 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=181774occurred in iteration=14, InterpolantAutomatonStates: 324, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 506 NumberOfCodeBlocks, 506 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 676 ConstructedInterpolants, 0 QuantifiedInterpolants, 7688 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1611 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 35 InterpolantComputations, 7 PerfectInterpolantSequences, 8/52 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