/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:29:02,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:29:02,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:29:02,436 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:29:02,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:29:02,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:29:02,439 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:29:02,439 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:29:02,439 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:29:02,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:29:02,443 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:29:02,443 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:29:02,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:29:02,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:29:02,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:29:02,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:29:02,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:29:02,445 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:29:02,445 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:29:02,445 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:29:02,446 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:29:02,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:29:02,446 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:29:02,447 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:29:02,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:29:02,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:29:02,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:29:02,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:29:02,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:29:02,448 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:29:02,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:29:02,449 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:29:02,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:29:02,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:29:02,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:29:02,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:29:02,664 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:29:02,665 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:29:02,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-11-17 12:29:03,687 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:29:03,845 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:29:03,846 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-11-17 12:29:03,851 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480609974/8d3b60e2631f42ba9328a571c3b75d3e/FLAG5ecb48546 [2023-11-17 12:29:03,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/480609974/8d3b60e2631f42ba9328a571c3b75d3e [2023-11-17 12:29:03,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:29:03,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:29:03,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:29:03,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:29:03,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:29:03,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:29:03" (1/1) ... [2023-11-17 12:29:03,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ecd8532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:03, skipping insertion in model container [2023-11-17 12:29:03,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:29:03" (1/1) ... [2023-11-17 12:29:03,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:29:04,032 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-prod-cons.wvr.c[3095,3108] [2023-11-17 12:29:04,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:29:04,057 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:29:04,075 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-prod-cons.wvr.c[3095,3108] [2023-11-17 12:29:04,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:29:04,084 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:29:04,085 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:29:04,090 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:29:04,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04 WrapperNode [2023-11-17 12:29:04,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:29:04,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:29:04,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:29:04,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:29:04,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,120 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 173 [2023-11-17 12:29:04,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:29:04,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:29:04,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:29:04,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:29:04,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,146 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,155 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:29:04,158 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:29:04,158 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:29:04,158 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:29:04,158 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (1/1) ... [2023-11-17 12:29:04,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:29:04,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:04,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 12:29:04,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 12:29:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:29:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:29:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:29:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:29:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:29:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:29:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:29:04,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:29:04,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:29:04,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:29:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:29:04,219 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:29:04,294 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:29:04,295 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:29:04,488 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:29:04,665 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:29:04,665 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 12:29:04,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:29:04 BoogieIcfgContainer [2023-11-17 12:29:04,666 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:29:04,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:29:04,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:29:04,669 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:29:04,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:29:03" (1/3) ... [2023-11-17 12:29:04,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284c4c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:29:04, skipping insertion in model container [2023-11-17 12:29:04,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:29:04" (2/3) ... [2023-11-17 12:29:04,670 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284c4c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:29:04, skipping insertion in model container [2023-11-17 12:29:04,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:29:04" (3/3) ... [2023-11-17 12:29:04,671 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-11-17 12:29:04,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:29:04,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:29:04,683 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:29:04,715 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 12:29:04,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 39 transitions, 99 flow [2023-11-17 12:29:04,774 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 12:29:04,774 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:29:04,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 36 events. 4/36 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-17 12:29:04,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 39 transitions, 99 flow [2023-11-17 12:29:04,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 35 transitions, 88 flow [2023-11-17 12:29:04,785 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:29:04,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 35 transitions, 88 flow [2023-11-17 12:29:04,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 35 transitions, 88 flow [2023-11-17 12:29:04,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 88 flow [2023-11-17 12:29:04,810 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-11-17 12:29:04,811 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:29:04,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 4/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2023-11-17 12:29:04,812 INFO L119 LiptonReduction]: Number of co-enabled transitions 412 [2023-11-17 12:29:05,204 INFO L134 LiptonReduction]: Checked pairs total: 860 [2023-11-17 12:29:05,204 INFO L136 LiptonReduction]: Total number of compositions: 13 [2023-11-17 12:29:05,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:29:05,225 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@558fe925, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:29:05,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 12:29:05,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:29:05,237 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 12:29:05,237 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 12:29:05,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:05,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:05,238 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)] === [2023-11-17 12:29:05,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash -348899887, now seen corresponding path program 1 times [2023-11-17 12:29:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:05,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323790455] [2023-11-17 12:29:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:05,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323790455] [2023-11-17 12:29:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323790455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:29:05,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:29:05,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:29:05,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268570467] [2023-11-17 12:29:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:29:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:29:05,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:05,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:29:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:29:05,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2023-11-17 12:29:05,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2023-11-17 12:29:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:05,735 INFO L124 PetriNetUnfolderBase]: 214/370 cut-off events. [2023-11-17 12:29:05,735 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-17 12:29:05,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 762 conditions, 370 events. 214/370 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1313 event pairs, 15 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 640. Up to 121 conditions per place. [2023-11-17 12:29:05,739 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 48 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-17 12:29:05,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 244 flow [2023-11-17 12:29:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:29:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:29:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2023-11-17 12:29:05,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-17 12:29:05,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 100 transitions. [2023-11-17 12:29:05,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 100 transitions. [2023-11-17 12:29:05,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:05,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 100 transitions. [2023-11-17 12:29:05,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,758 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 5 states and 100 transitions. [2023-11-17 12:29:05,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 244 flow [2023-11-17 12:29:05,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 221 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-17 12:29:05,762 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 84 flow [2023-11-17 12:29:05,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 12:29:05,766 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-17 12:29:05,766 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 84 flow [2023-11-17 12:29:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:05,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:29:05,767 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)] === [2023-11-17 12:29:05,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash -183119331, now seen corresponding path program 2 times [2023-11-17 12:29:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:05,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691315643] [2023-11-17 12:29:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691315643] [2023-11-17 12:29:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691315643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:29:05,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:29:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:29:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950738990] [2023-11-17 12:29:05,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:29:05,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:29:05,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:05,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:29:05,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:29:05,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 52 [2023-11-17 12:29:05,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:05,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:05,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 52 [2023-11-17 12:29:05,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:06,171 INFO L124 PetriNetUnfolderBase]: 474/756 cut-off events. [2023-11-17 12:29:06,171 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-11-17 12:29:06,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752 conditions, 756 events. 474/756 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2836 event pairs, 37 based on Foata normal form. 20/717 useless extension candidates. Maximal degree in co-relation 658. Up to 278 conditions per place. [2023-11-17 12:29:06,176 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 59 selfloop transitions, 6 changer transitions 4/69 dead transitions. [2023-11-17 12:29:06,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 69 transitions, 318 flow [2023-11-17 12:29:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:29:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:29:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2023-11-17 12:29:06,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434065934065934 [2023-11-17 12:29:06,177 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 125 transitions. [2023-11-17 12:29:06,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 125 transitions. [2023-11-17 12:29:06,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:06,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 125 transitions. [2023-11-17 12:29:06,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,180 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,180 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 84 flow. Second operand 7 states and 125 transitions. [2023-11-17 12:29:06,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 69 transitions, 318 flow [2023-11-17 12:29:06,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:29:06,182 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 98 flow [2023-11-17 12:29:06,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=98, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-11-17 12:29:06,183 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-11-17 12:29:06,183 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 98 flow [2023-11-17 12:29:06,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:06,184 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, 1] [2023-11-17 12:29:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:29:06,184 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)] === [2023-11-17 12:29:06,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash 805215328, now seen corresponding path program 1 times [2023-11-17 12:29:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642839953] [2023-11-17 12:29:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:06,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:06,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642839953] [2023-11-17 12:29:06,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642839953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:29:06,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:29:06,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:29:06,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31858266] [2023-11-17 12:29:06,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:29:06,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:29:06,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:06,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:29:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:29:06,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2023-11-17 12:29:06,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:06,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2023-11-17 12:29:06,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:06,290 INFO L124 PetriNetUnfolderBase]: 217/405 cut-off events. [2023-11-17 12:29:06,290 INFO L125 PetriNetUnfolderBase]: For 524/524 co-relation queries the response was YES. [2023-11-17 12:29:06,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 405 events. 217/405 cut-off events. For 524/524 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1453 event pairs, 99 based on Foata normal form. 18/380 useless extension candidates. Maximal degree in co-relation 589. Up to 264 conditions per place. [2023-11-17 12:29:06,293 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 29 selfloop transitions, 2 changer transitions 3/38 dead transitions. [2023-11-17 12:29:06,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 198 flow [2023-11-17 12:29:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:29:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:29:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2023-11-17 12:29:06,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935897435897436 [2023-11-17 12:29:06,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 77 transitions. [2023-11-17 12:29:06,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 77 transitions. [2023-11-17 12:29:06,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:06,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 77 transitions. [2023-11-17 12:29:06,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,295 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 98 flow. Second operand 3 states and 77 transitions. [2023-11-17 12:29:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 198 flow [2023-11-17 12:29:06,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 176 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 12:29:06,297 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 92 flow [2023-11-17 12:29:06,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-17 12:29:06,298 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-11-17 12:29:06,298 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 92 flow [2023-11-17 12:29:06,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:06,298 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, 1, 1, 1] [2023-11-17 12:29:06,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:29:06,298 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)] === [2023-11-17 12:29:06,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash -176916710, now seen corresponding path program 1 times [2023-11-17 12:29:06,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:06,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083506056] [2023-11-17 12:29:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:06,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083506056] [2023-11-17 12:29:06,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083506056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:29:06,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:29:06,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:29:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960893094] [2023-11-17 12:29:06,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:29:06,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:29:06,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:29:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:29:06,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2023-11-17 12:29:06,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:06,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2023-11-17 12:29:06,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:06,442 INFO L124 PetriNetUnfolderBase]: 258/492 cut-off events. [2023-11-17 12:29:06,442 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2023-11-17 12:29:06,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 492 events. 258/492 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1846 event pairs, 211 based on Foata normal form. 10/447 useless extension candidates. Maximal degree in co-relation 761. Up to 352 conditions per place. [2023-11-17 12:29:06,466 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 23 selfloop transitions, 2 changer transitions 13/42 dead transitions. [2023-11-17 12:29:06,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 203 flow [2023-11-17 12:29:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:29:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:29:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2023-11-17 12:29:06,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2023-11-17 12:29:06,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 94 transitions. [2023-11-17 12:29:06,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 94 transitions. [2023-11-17 12:29:06,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:06,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 94 transitions. [2023-11-17 12:29:06,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,470 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 52.0) internal successors, (260), 5 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,470 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 92 flow. Second operand 4 states and 94 transitions. [2023-11-17 12:29:06,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 203 flow [2023-11-17 12:29:06,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 201 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:29:06,472 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 104 flow [2023-11-17 12:29:06,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-17 12:29:06,472 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-17 12:29:06,473 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 104 flow [2023-11-17 12:29:06,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:06,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:06,473 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, 1, 1, 1, 1] [2023-11-17 12:29:06,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:29:06,473 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)] === [2023-11-17 12:29:06,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1331432102, now seen corresponding path program 1 times [2023-11-17 12:29:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:06,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654199630] [2023-11-17 12:29:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:06,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:06,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654199630] [2023-11-17 12:29:06,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654199630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:06,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553056451] [2023-11-17 12:29:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:06,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:06,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:07,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:29:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:07,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 12:29:07,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:07,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:29:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:29:07,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-17 12:29:07,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 12:29:07,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:29:07,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:29:07,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:29:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:07,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:08,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:08,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-17 12:29:08,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:08,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 312 treesize of output 304 [2023-11-17 12:29:08,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:08,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 256 [2023-11-17 12:29:08,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:08,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 183 [2023-11-17 12:29:08,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:08,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 220 [2023-11-17 12:29:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:09,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553056451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:09,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:09,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2023-11-17 12:29:09,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481134317] [2023-11-17 12:29:09,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:09,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 12:29:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:09,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 12:29:09,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=955, Unknown=5, NotChecked=0, Total=1122 [2023-11-17 12:29:09,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:29:09,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 104 flow. Second operand has 34 states, 34 states have (on average 8.852941176470589) internal successors, (301), 34 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:09,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:09,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:29:09,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:10,938 INFO L124 PetriNetUnfolderBase]: 731/1223 cut-off events. [2023-11-17 12:29:10,938 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2023-11-17 12:29:10,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3223 conditions, 1223 events. 731/1223 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5108 event pairs, 47 based on Foata normal form. 25/1122 useless extension candidates. Maximal degree in co-relation 3206. Up to 353 conditions per place. [2023-11-17 12:29:10,943 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 134 selfloop transitions, 34 changer transitions 41/209 dead transitions. [2023-11-17 12:29:10,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 209 transitions, 1038 flow [2023-11-17 12:29:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:29:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:29:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 404 transitions. [2023-11-17 12:29:10,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2774725274725275 [2023-11-17 12:29:10,945 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 404 transitions. [2023-11-17 12:29:10,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 404 transitions. [2023-11-17 12:29:10,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:10,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 404 transitions. [2023-11-17 12:29:10,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 14.428571428571429) internal successors, (404), 28 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 52.0) internal successors, (1508), 29 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,948 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 52.0) internal successors, (1508), 29 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,949 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 104 flow. Second operand 28 states and 404 transitions. [2023-11-17 12:29:10,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 209 transitions, 1038 flow [2023-11-17 12:29:10,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 209 transitions, 1026 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:29:10,952 INFO L231 Difference]: Finished difference. Result has 81 places, 57 transitions, 383 flow [2023-11-17 12:29:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=383, PETRI_PLACES=81, PETRI_TRANSITIONS=57} [2023-11-17 12:29:10,953 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2023-11-17 12:29:10,953 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 57 transitions, 383 flow [2023-11-17 12:29:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.852941176470589) internal successors, (301), 34 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:10,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:10,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:10,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:11,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:11,159 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)] === [2023-11-17 12:29:11,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:11,160 INFO L85 PathProgramCache]: Analyzing trace with hash -343100276, now seen corresponding path program 2 times [2023-11-17 12:29:11,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:11,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119992103] [2023-11-17 12:29:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:11,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:11,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119992103] [2023-11-17 12:29:11,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119992103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022882317] [2023-11-17 12:29:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:29:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:11,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:11,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:29:11,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:29:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:11,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 12:29:11,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:12,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:12,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:12,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2023-11-17 12:29:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:12,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022882317] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:12,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:12,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2023-11-17 12:29:12,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619346240] [2023-11-17 12:29:12,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:12,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:29:12,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:29:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:29:12,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:29:12,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 57 transitions, 383 flow. Second operand has 28 states, 28 states have (on average 9.464285714285714) internal successors, (265), 28 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:12,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:12,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:29:12,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:13,327 INFO L124 PetriNetUnfolderBase]: 1033/1732 cut-off events. [2023-11-17 12:29:13,327 INFO L125 PetriNetUnfolderBase]: For 8416/8416 co-relation queries the response was YES. [2023-11-17 12:29:13,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7773 conditions, 1732 events. 1033/1732 cut-off events. For 8416/8416 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8192 event pairs, 30 based on Foata normal form. 16/1746 useless extension candidates. Maximal degree in co-relation 7639. Up to 534 conditions per place. [2023-11-17 12:29:13,338 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 162 selfloop transitions, 71 changer transitions 18/251 dead transitions. [2023-11-17 12:29:13,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 251 transitions, 1931 flow [2023-11-17 12:29:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:29:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:29:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 418 transitions. [2023-11-17 12:29:13,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26794871794871794 [2023-11-17 12:29:13,340 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 418 transitions. [2023-11-17 12:29:13,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 418 transitions. [2023-11-17 12:29:13,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:13,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 418 transitions. [2023-11-17 12:29:13,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 13.933333333333334) internal successors, (418), 30 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:13,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:13,344 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 52.0) internal successors, (1612), 31 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:13,344 INFO L175 Difference]: Start difference. First operand has 81 places, 57 transitions, 383 flow. Second operand 30 states and 418 transitions. [2023-11-17 12:29:13,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 251 transitions, 1931 flow [2023-11-17 12:29:13,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 251 transitions, 1875 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-17 12:29:13,367 INFO L231 Difference]: Finished difference. Result has 113 places, 98 transitions, 905 flow [2023-11-17 12:29:13,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=905, PETRI_PLACES=113, PETRI_TRANSITIONS=98} [2023-11-17 12:29:13,369 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 81 predicate places. [2023-11-17 12:29:13,370 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 98 transitions, 905 flow [2023-11-17 12:29:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.464285714285714) internal successors, (265), 28 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:13,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:13,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:13,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:13,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 12:29:13,576 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)] === [2023-11-17 12:29:13,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1880517296, now seen corresponding path program 3 times [2023-11-17 12:29:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:13,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16885133] [2023-11-17 12:29:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:14,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:14,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16885133] [2023-11-17 12:29:14,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16885133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:14,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88815905] [2023-11-17 12:29:14,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:29:14,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:14,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:14,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:14,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:29:14,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:29:14,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:14,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 12:29:14,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:29:14,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:29:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:14,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:14,799 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_168 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_168) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) (+ c_~W~0 1))) is different from false [2023-11-17 12:29:14,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:14,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-11-17 12:29:14,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-17 12:29:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-17 12:29:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88815905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:14,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:14,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2023-11-17 12:29:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865735700] [2023-11-17 12:29:14,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:14,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 12:29:14,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 12:29:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=888, Unknown=1, NotChecked=60, Total=1056 [2023-11-17 12:29:14,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:29:14,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 98 transitions, 905 flow. Second operand has 33 states, 33 states have (on average 9.090909090909092) internal successors, (300), 33 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:14,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:14,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:29:14,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:16,235 INFO L124 PetriNetUnfolderBase]: 1281/2133 cut-off events. [2023-11-17 12:29:16,236 INFO L125 PetriNetUnfolderBase]: For 23437/23437 co-relation queries the response was YES. [2023-11-17 12:29:16,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12303 conditions, 2133 events. 1281/2133 cut-off events. For 23437/23437 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10729 event pairs, 26 based on Foata normal form. 16/2148 useless extension candidates. Maximal degree in co-relation 8834. Up to 720 conditions per place. [2023-11-17 12:29:16,252 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 83 changer transitions 6/256 dead transitions. [2023-11-17 12:29:16,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 256 transitions, 2583 flow [2023-11-17 12:29:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:29:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:29:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 399 transitions. [2023-11-17 12:29:16,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2645888594164456 [2023-11-17 12:29:16,254 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 399 transitions. [2023-11-17 12:29:16,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 399 transitions. [2023-11-17 12:29:16,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:16,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 399 transitions. [2023-11-17 12:29:16,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 13.758620689655173) internal successors, (399), 29 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:16,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 52.0) internal successors, (1560), 30 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:16,257 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 52.0) internal successors, (1560), 30 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:16,257 INFO L175 Difference]: Start difference. First operand has 113 places, 98 transitions, 905 flow. Second operand 29 states and 399 transitions. [2023-11-17 12:29:16,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 256 transitions, 2583 flow [2023-11-17 12:29:16,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 256 transitions, 2436 flow, removed 38 selfloop flow, removed 8 redundant places. [2023-11-17 12:29:16,288 INFO L231 Difference]: Finished difference. Result has 137 places, 115 transitions, 1197 flow [2023-11-17 12:29:16,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1197, PETRI_PLACES=137, PETRI_TRANSITIONS=115} [2023-11-17 12:29:16,289 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 105 predicate places. [2023-11-17 12:29:16,289 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 115 transitions, 1197 flow [2023-11-17 12:29:16,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.090909090909092) internal successors, (300), 33 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:16,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:16,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:16,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:16,495 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 [2023-11-17 12:29:16,495 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)] === [2023-11-17 12:29:16,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 449363408, now seen corresponding path program 4 times [2023-11-17 12:29:16,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:16,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156171770] [2023-11-17 12:29:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156171770] [2023-11-17 12:29:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156171770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623813943] [2023-11-17 12:29:17,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:29:17,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:17,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:17,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:29:17,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:29:17,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:17,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:29:17,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:17,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:29:17,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:29:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:29:17,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 12:29:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:17,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:17,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:17,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 88 [2023-11-17 12:29:17,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-11-17 12:29:17,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-11-17 12:29:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:29:18,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623813943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:18,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:18,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 34 [2023-11-17 12:29:18,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195394406] [2023-11-17 12:29:18,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:18,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 12:29:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 12:29:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1036, Unknown=7, NotChecked=0, Total=1190 [2023-11-17 12:29:18,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:29:18,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 115 transitions, 1197 flow. Second operand has 35 states, 35 states have (on average 9.2) internal successors, (322), 35 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:18,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:18,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:29:18,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:19,858 INFO L124 PetriNetUnfolderBase]: 1542/2556 cut-off events. [2023-11-17 12:29:19,858 INFO L125 PetriNetUnfolderBase]: For 33770/33770 co-relation queries the response was YES. [2023-11-17 12:29:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15841 conditions, 2556 events. 1542/2556 cut-off events. For 33770/33770 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13125 event pairs, 74 based on Foata normal form. 16/2572 useless extension candidates. Maximal degree in co-relation 15720. Up to 800 conditions per place. [2023-11-17 12:29:19,878 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 173 selfloop transitions, 97 changer transitions 6/276 dead transitions. [2023-11-17 12:29:19,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 276 transitions, 3000 flow [2023-11-17 12:29:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 12:29:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 12:29:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 421 transitions. [2023-11-17 12:29:19,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26116625310173697 [2023-11-17 12:29:19,879 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 421 transitions. [2023-11-17 12:29:19,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 421 transitions. [2023-11-17 12:29:19,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:19,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 421 transitions. [2023-11-17 12:29:19,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 13.580645161290322) internal successors, (421), 31 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:19,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:19,882 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 52.0) internal successors, (1664), 32 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:19,882 INFO L175 Difference]: Start difference. First operand has 137 places, 115 transitions, 1197 flow. Second operand 31 states and 421 transitions. [2023-11-17 12:29:19,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 276 transitions, 3000 flow [2023-11-17 12:29:19,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 276 transitions, 2781 flow, removed 54 selfloop flow, removed 21 redundant places. [2023-11-17 12:29:19,925 INFO L231 Difference]: Finished difference. Result has 149 places, 128 transitions, 1510 flow [2023-11-17 12:29:19,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1510, PETRI_PLACES=149, PETRI_TRANSITIONS=128} [2023-11-17 12:29:19,927 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 117 predicate places. [2023-11-17 12:29:19,927 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 128 transitions, 1510 flow [2023-11-17 12:29:19,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.2) internal successors, (322), 35 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:19,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:19,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:19,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:20,134 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)] === [2023-11-17 12:29:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1999541371, now seen corresponding path program 5 times [2023-11-17 12:29:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474641420] [2023-11-17 12:29:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:20,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474641420] [2023-11-17 12:29:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474641420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763372667] [2023-11-17 12:29:20,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:29:20,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:20,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:20,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:29:20,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:29:20,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:20,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:29:20,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:20,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:29:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763372667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:20,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:20,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 10 [2023-11-17 12:29:20,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185961509] [2023-11-17 12:29:20,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:20,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:29:20,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:20,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:29:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:29:20,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2023-11-17 12:29:20,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 128 transitions, 1510 flow. Second operand has 11 states, 11 states have (on average 19.454545454545453) internal successors, (214), 11 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:20,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:20,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2023-11-17 12:29:20,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:20,985 INFO L124 PetriNetUnfolderBase]: 2060/3878 cut-off events. [2023-11-17 12:29:20,985 INFO L125 PetriNetUnfolderBase]: For 60975/61268 co-relation queries the response was YES. [2023-11-17 12:29:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23804 conditions, 3878 events. 2060/3878 cut-off events. For 60975/61268 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25824 event pairs, 460 based on Foata normal form. 153/3991 useless extension candidates. Maximal degree in co-relation 23681. Up to 1061 conditions per place. [2023-11-17 12:29:21,016 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 99 selfloop transitions, 21 changer transitions 110/243 dead transitions. [2023-11-17 12:29:21,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 243 transitions, 2995 flow [2023-11-17 12:29:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:29:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:29:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2023-11-17 12:29:21,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46853146853146854 [2023-11-17 12:29:21,017 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 268 transitions. [2023-11-17 12:29:21,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 268 transitions. [2023-11-17 12:29:21,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:29:21,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 268 transitions. [2023-11-17 12:29:21,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 24.363636363636363) internal successors, (268), 11 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:21,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:21,019 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 52.0) internal successors, (624), 12 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:21,019 INFO L175 Difference]: Start difference. First operand has 149 places, 128 transitions, 1510 flow. Second operand 11 states and 268 transitions. [2023-11-17 12:29:21,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 243 transitions, 2995 flow [2023-11-17 12:29:21,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 243 transitions, 2782 flow, removed 20 selfloop flow, removed 21 redundant places. [2023-11-17 12:29:21,099 INFO L231 Difference]: Finished difference. Result has 142 places, 93 transitions, 1055 flow [2023-11-17 12:29:21,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1055, PETRI_PLACES=142, PETRI_TRANSITIONS=93} [2023-11-17 12:29:21,100 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 110 predicate places. [2023-11-17 12:29:21,100 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 93 transitions, 1055 flow [2023-11-17 12:29:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.454545454545453) internal successors, (214), 11 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:21,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:29:21,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:29:21,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:29:21,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:21,305 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)] === [2023-11-17 12:29:21,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:29:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash 119200623, now seen corresponding path program 6 times [2023-11-17 12:29:21,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:29:21,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959451271] [2023-11-17 12:29:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:29:21,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:29:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:29:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:21,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:29:21,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959451271] [2023-11-17 12:29:21,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959451271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:29:21,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778555219] [2023-11-17 12:29:21,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:29:21,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:29:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:29:21,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:29:21,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:29:22,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:29:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:29:22,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-17 12:29:22,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:29:22,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 12:29:22,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:29:22,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 12:29:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:29:22,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 12:29:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:22,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:29:23,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:23,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 91 [2023-11-17 12:29:23,762 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 12:29:23,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4540 treesize of output 4122 [2023-11-17 12:29:23,822 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 12:29:23,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 380 [2023-11-17 12:29:23,866 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-17 12:29:23,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 354 treesize of output 348 [2023-11-17 12:29:23,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:29:23,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 169 [2023-11-17 12:29:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:29:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778555219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:29:25,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:29:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 47 [2023-11-17 12:29:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492583827] [2023-11-17 12:29:25,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:29:25,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-17 12:29:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:29:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-17 12:29:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1920, Unknown=10, NotChecked=0, Total=2256 [2023-11-17 12:29:25,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:29:25,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 93 transitions, 1055 flow. Second operand has 48 states, 48 states have (on average 8.770833333333334) internal successors, (421), 48 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:29:25,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:29:25,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:29:25,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:29:32,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:34,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:39,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:42,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:45,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:47,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:50,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:52,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:56,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:29:59,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:01,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:03,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:05,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:07,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:10,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:14,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:17,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 12:30:18,181 INFO L124 PetriNetUnfolderBase]: 7760/12928 cut-off events. [2023-11-17 12:30:18,181 INFO L125 PetriNetUnfolderBase]: For 196217/196217 co-relation queries the response was YES. [2023-11-17 12:30:18,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80532 conditions, 12928 events. 7760/12928 cut-off events. For 196217/196217 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 87955 event pairs, 779 based on Foata normal form. 198/13126 useless extension candidates. Maximal degree in co-relation 80472. Up to 2890 conditions per place. [2023-11-17 12:30:18,262 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 757 selfloop transitions, 499 changer transitions 138/1394 dead transitions. [2023-11-17 12:30:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1394 transitions, 15347 flow [2023-11-17 12:30:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-11-17 12:30:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2023-11-17 12:30:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 2456 transitions. [2023-11-17 12:30:18,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26534140017286084 [2023-11-17 12:30:18,267 INFO L72 ComplementDD]: Start complementDD. Operand 178 states and 2456 transitions. [2023-11-17 12:30:18,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 178 states and 2456 transitions. [2023-11-17 12:30:18,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:30:18,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 178 states and 2456 transitions. [2023-11-17 12:30:18,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 179 states, 178 states have (on average 13.797752808988765) internal successors, (2456), 178 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:18,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 179 states, 179 states have (on average 52.0) internal successors, (9308), 179 states have internal predecessors, (9308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:18,292 INFO L81 ComplementDD]: Finished complementDD. Result has 179 states, 179 states have (on average 52.0) internal successors, (9308), 179 states have internal predecessors, (9308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:18,292 INFO L175 Difference]: Start difference. First operand has 142 places, 93 transitions, 1055 flow. Second operand 178 states and 2456 transitions. [2023-11-17 12:30:18,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1394 transitions, 15347 flow [2023-11-17 12:30:18,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1394 transitions, 13726 flow, removed 749 selfloop flow, removed 17 redundant places. [2023-11-17 12:30:18,619 INFO L231 Difference]: Finished difference. Result has 325 places, 650 transitions, 8547 flow [2023-11-17 12:30:18,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=178, PETRI_FLOW=8547, PETRI_PLACES=325, PETRI_TRANSITIONS=650} [2023-11-17 12:30:18,620 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 293 predicate places. [2023-11-17 12:30:18,620 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 650 transitions, 8547 flow [2023-11-17 12:30:18,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 8.770833333333334) internal successors, (421), 48 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:18,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:18,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:18,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:30:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:18,830 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)] === [2023-11-17 12:30:18,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:18,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1885875321, now seen corresponding path program 7 times [2023-11-17 12:30:18,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:18,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369319658] [2023-11-17 12:30:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:19,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369319658] [2023-11-17 12:30:19,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369319658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:19,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065317187] [2023-11-17 12:30:19,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:30:19,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:19,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:19,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:30:19,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:30:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:19,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 12:30:19,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:20,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:20,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:30:20,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-17 12:30:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:20,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065317187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:20,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:20,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-11-17 12:30:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315074495] [2023-11-17 12:30:20,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:20,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-17 12:30:20,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-17 12:30:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2023-11-17 12:30:20,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:30:20,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 650 transitions, 8547 flow. Second operand has 44 states, 44 states have (on average 8.931818181818182) internal successors, (393), 44 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:20,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:20,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:30:20,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:30:29,280 INFO L124 PetriNetUnfolderBase]: 10934/18114 cut-off events. [2023-11-17 12:30:29,280 INFO L125 PetriNetUnfolderBase]: For 1509318/1509318 co-relation queries the response was YES. [2023-11-17 12:30:29,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180347 conditions, 18114 events. 10934/18114 cut-off events. For 1509318/1509318 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 131512 event pairs, 2316 based on Foata normal form. 78/18192 useless extension candidates. Maximal degree in co-relation 179481. Up to 7861 conditions per place. [2023-11-17 12:30:29,454 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 961 selfloop transitions, 589 changer transitions 107/1657 dead transitions. [2023-11-17 12:30:29,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1657 transitions, 26624 flow [2023-11-17 12:30:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-17 12:30:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-11-17 12:30:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 1214 transitions. [2023-11-17 12:30:29,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2882241215574549 [2023-11-17 12:30:29,462 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 1214 transitions. [2023-11-17 12:30:29,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 1214 transitions. [2023-11-17 12:30:29,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:30:29,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 1214 transitions. [2023-11-17 12:30:29,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 14.987654320987655) internal successors, (1214), 81 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:29,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 52.0) internal successors, (4264), 82 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:29,471 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 52.0) internal successors, (4264), 82 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:29,471 INFO L175 Difference]: Start difference. First operand has 325 places, 650 transitions, 8547 flow. Second operand 81 states and 1214 transitions. [2023-11-17 12:30:29,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1657 transitions, 26624 flow [2023-11-17 12:30:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1657 transitions, 20492 flow, removed 2970 selfloop flow, removed 17 redundant places. [2023-11-17 12:30:33,498 INFO L231 Difference]: Finished difference. Result has 411 places, 997 transitions, 11908 flow [2023-11-17 12:30:33,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=11908, PETRI_PLACES=411, PETRI_TRANSITIONS=997} [2023-11-17 12:30:33,499 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 379 predicate places. [2023-11-17 12:30:33,499 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 997 transitions, 11908 flow [2023-11-17 12:30:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 8.931818181818182) internal successors, (393), 44 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:33,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:33,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:33,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 12:30:33,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:33,706 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)] === [2023-11-17 12:30:33,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash -884295039, now seen corresponding path program 8 times [2023-11-17 12:30:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:33,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999233247] [2023-11-17 12:30:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:33,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:34,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999233247] [2023-11-17 12:30:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999233247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289354571] [2023-11-17 12:30:34,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:30:34,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:34,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:30:34,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:30:34,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:30:34,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:34,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 12:30:34,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:35,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:30:35,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-17 12:30:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:30:35,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:35,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:30:35,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 77 [2023-11-17 12:30:35,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-11-17 12:30:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:30:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289354571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:35,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 41 [2023-11-17 12:30:35,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993601082] [2023-11-17 12:30:35,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-17 12:30:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-17 12:30:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1539, Unknown=19, NotChecked=0, Total=1722 [2023-11-17 12:30:35,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:30:35,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 997 transitions, 11908 flow. Second operand has 42 states, 42 states have (on average 8.880952380952381) internal successors, (373), 42 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:35,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:35,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:30:35,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:30:39,401 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~v_assert~0 1) (forall ((v_ArrVal_351 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_351) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) (<= c_~d~0 c_~W~0) (= |c_thread2Thread1of1ForFork0_~cond~1#1| 1)) is different from false [2023-11-17 12:30:40,544 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod c_~v_assert~0 256)) (forall ((v_ArrVal_351 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_351) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) (+ c_~W~0 1))) (= |c_thread2Thread1of1ForFork0_~cond~1#1| 1)) is different from false [2023-11-17 12:30:45,976 INFO L124 PetriNetUnfolderBase]: 14315/23633 cut-off events. [2023-11-17 12:30:45,977 INFO L125 PetriNetUnfolderBase]: For 2813565/2813565 co-relation queries the response was YES. [2023-11-17 12:30:46,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253229 conditions, 23633 events. 14315/23633 cut-off events. For 2813565/2813565 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 177920 event pairs, 3023 based on Foata normal form. 64/23688 useless extension candidates. Maximal degree in co-relation 252341. Up to 9268 conditions per place. [2023-11-17 12:30:46,391 INFO L140 encePairwiseOnDemand]: 33/52 looper letters, 1079 selfloop transitions, 555 changer transitions 92/1726 dead transitions. [2023-11-17 12:30:46,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1726 transitions, 26831 flow [2023-11-17 12:30:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-17 12:30:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-11-17 12:30:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 1078 transitions. [2023-11-17 12:30:46,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2879273504273504 [2023-11-17 12:30:46,394 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 1078 transitions. [2023-11-17 12:30:46,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 1078 transitions. [2023-11-17 12:30:46,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:30:46,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 1078 transitions. [2023-11-17 12:30:46,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 14.972222222222221) internal successors, (1078), 72 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:46,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 52.0) internal successors, (3796), 73 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:46,401 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 52.0) internal successors, (3796), 73 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:46,401 INFO L175 Difference]: Start difference. First operand has 411 places, 997 transitions, 11908 flow. Second operand 72 states and 1078 transitions. [2023-11-17 12:30:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1726 transitions, 26831 flow [2023-11-17 12:30:52,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1726 transitions, 25235 flow, removed 594 selfloop flow, removed 17 redundant places. [2023-11-17 12:30:52,190 INFO L231 Difference]: Finished difference. Result has 498 places, 1160 transitions, 15645 flow [2023-11-17 12:30:52,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10798, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=15645, PETRI_PLACES=498, PETRI_TRANSITIONS=1160} [2023-11-17 12:30:52,191 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 466 predicate places. [2023-11-17 12:30:52,191 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1160 transitions, 15645 flow [2023-11-17 12:30:52,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 8.880952380952381) internal successors, (373), 42 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:52,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:30:52,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:30:52,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 12:30:52,396 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,SelfDestructingSolverStorable11 [2023-11-17 12:30:52,396 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)] === [2023-11-17 12:30:52,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:30:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2080026081, now seen corresponding path program 9 times [2023-11-17 12:30:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:30:52,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590293640] [2023-11-17 12:30:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:30:52,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:30:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:30:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:30:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590293640] [2023-11-17 12:30:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590293640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:30:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069276938] [2023-11-17 12:30:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:30:53,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:30:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:30:53,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:30:53,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:30:53,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:30:53,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:30:53,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 12:30:53,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:30:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:30:53,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-17 12:30:53,991 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-17 12:30:53,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2023-11-17 12:30:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:54,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:30:54,601 INFO L349 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-11-17 12:30:54,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 64 [2023-11-17 12:30:54,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-17 12:30:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:30:55,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069276938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:30:55,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:30:55,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2023-11-17 12:30:55,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984853546] [2023-11-17 12:30:55,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:30:55,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-17 12:30:55,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:30:55,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-17 12:30:55,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1733, Unknown=3, NotChecked=0, Total=1980 [2023-11-17 12:30:55,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:30:55,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1160 transitions, 15645 flow. Second operand has 45 states, 45 states have (on average 8.822222222222223) internal successors, (397), 45 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:30:55,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:30:55,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:30:55,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:31:31,875 INFO L124 PetriNetUnfolderBase]: 32841/54523 cut-off events. [2023-11-17 12:31:31,876 INFO L125 PetriNetUnfolderBase]: For 10026012/10026012 co-relation queries the response was YES. [2023-11-17 12:31:33,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759478 conditions, 54523 events. 32841/54523 cut-off events. For 10026012/10026012 co-relation queries the response was YES. Maximal size of possible extension queue 1727. Compared 448094 event pairs, 3776 based on Foata normal form. 842/55356 useless extension candidates. Maximal degree in co-relation 758542. Up to 29019 conditions per place. [2023-11-17 12:31:33,388 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 1650 selfloop transitions, 1588 changer transitions 372/3610 dead transitions. [2023-11-17 12:31:33,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 3610 transitions, 62237 flow [2023-11-17 12:31:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-11-17 12:31:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2023-11-17 12:31:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 2197 transitions. [2023-11-17 12:31:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29545454545454547 [2023-11-17 12:31:33,405 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 2197 transitions. [2023-11-17 12:31:33,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 2197 transitions. [2023-11-17 12:31:33,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:31:33,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 2197 transitions. [2023-11-17 12:31:33,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 15.363636363636363) internal successors, (2197), 143 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:33,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 52.0) internal successors, (7488), 144 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:33,433 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 52.0) internal successors, (7488), 144 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:31:33,434 INFO L175 Difference]: Start difference. First operand has 498 places, 1160 transitions, 15645 flow. Second operand 143 states and 2197 transitions. [2023-11-17 12:31:33,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 3610 transitions, 62237 flow [2023-11-17 12:32:23,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 3610 transitions, 60338 flow, removed 624 selfloop flow, removed 26 redundant places. [2023-11-17 12:32:23,249 INFO L231 Difference]: Finished difference. Result has 662 places, 2245 transitions, 34429 flow [2023-11-17 12:32:23,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=14507, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=34429, PETRI_PLACES=662, PETRI_TRANSITIONS=2245} [2023-11-17 12:32:23,251 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 630 predicate places. [2023-11-17 12:32:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 2245 transitions, 34429 flow [2023-11-17 12:32:23,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 8.822222222222223) internal successors, (397), 45 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:23,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:32:23,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:32:23,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:32:23,456 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,SelfDestructingSolverStorable12 [2023-11-17 12:32:23,456 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)] === [2023-11-17 12:32:23,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:32:23,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1834762865, now seen corresponding path program 10 times [2023-11-17 12:32:23,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:32:23,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74978010] [2023-11-17 12:32:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:32:23,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:32:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:32:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:32:24,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:32:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74978010] [2023-11-17 12:32:24,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74978010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:32:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315293176] [2023-11-17 12:32:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:32:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:32:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:32:24,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:32:24,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:32:24,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:32:24,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:32:24,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 12:32:24,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:32:24,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2023-11-17 12:32:24,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-17 12:32:24,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2023-11-17 12:32:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:32:24,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:32:25,130 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_429 (Array Int Int)) (v_ArrVal_428 (Array Int Int))) (< (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_428) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_429) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (+ (select .cse0 (+ c_~queue~0.offset .cse1 4)) c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1)))) (+ c_~W~0 1))) (= (mod c_~v_assert~0 256) 0)) is different from false [2023-11-17 12:32:25,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:32:25,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 256 [2023-11-17 12:32:25,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2023-11-17 12:32:25,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:32:25,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 22 [2023-11-17 12:32:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:32:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315293176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:32:25,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:32:25,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 45 [2023-11-17 12:32:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545214132] [2023-11-17 12:32:25,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:32:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-17 12:32:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:32:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-17 12:32:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1777, Unknown=6, NotChecked=86, Total=2070 [2023-11-17 12:32:25,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:32:25,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 2245 transitions, 34429 flow. Second operand has 46 states, 46 states have (on average 8.826086956521738) internal successors, (406), 46 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:32:25,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:32:25,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:32:25,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:33:01,890 INFO L124 PetriNetUnfolderBase]: 35080/58212 cut-off events. [2023-11-17 12:33:01,898 INFO L125 PetriNetUnfolderBase]: For 12368364/12368364 co-relation queries the response was YES. [2023-11-17 12:33:03,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890558 conditions, 58212 events. 35080/58212 cut-off events. For 12368364/12368364 co-relation queries the response was YES. Maximal size of possible extension queue 1934. Compared 485923 event pairs, 8508 based on Foata normal form. 230/58433 useless extension candidates. Maximal degree in co-relation 889534. Up to 31722 conditions per place. [2023-11-17 12:33:04,128 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 1810 selfloop transitions, 992 changer transitions 261/3063 dead transitions. [2023-11-17 12:33:04,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 3063 transitions, 56169 flow [2023-11-17 12:33:04,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 12:33:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 12:33:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 642 transitions. [2023-11-17 12:33:04,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2743589743589744 [2023-11-17 12:33:04,134 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 642 transitions. [2023-11-17 12:33:04,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 642 transitions. [2023-11-17 12:33:04,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:33:04,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 642 transitions. [2023-11-17 12:33:04,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 14.266666666666667) internal successors, (642), 45 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:04,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 52.0) internal successors, (2392), 46 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:04,152 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 52.0) internal successors, (2392), 46 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:33:04,153 INFO L175 Difference]: Start difference. First operand has 662 places, 2245 transitions, 34429 flow. Second operand 45 states and 642 transitions. [2023-11-17 12:33:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 3063 transitions, 56169 flow [2023-11-17 12:34:05,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 3063 transitions, 49814 flow, removed 2727 selfloop flow, removed 28 redundant places. [2023-11-17 12:34:05,566 INFO L231 Difference]: Finished difference. Result has 690 places, 2373 transitions, 35937 flow [2023-11-17 12:34:05,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=30062, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=35937, PETRI_PLACES=690, PETRI_TRANSITIONS=2373} [2023-11-17 12:34:05,568 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 658 predicate places. [2023-11-17 12:34:05,568 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 2373 transitions, 35937 flow [2023-11-17 12:34:05,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 8.826086956521738) internal successors, (406), 46 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:05,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:34:05,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:34:05,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:34:05,773 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,SelfDestructingSolverStorable13 [2023-11-17 12:34:05,773 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)] === [2023-11-17 12:34:05,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:34:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1109632119, now seen corresponding path program 11 times [2023-11-17 12:34:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:34:05,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005717851] [2023-11-17 12:34:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:34:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:34:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:34:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:06,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:34:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005717851] [2023-11-17 12:34:06,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005717851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:34:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099840902] [2023-11-17 12:34:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:34:06,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:34:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:34:06,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:34:06,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:34:06,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:34:06,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:34:06,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 12:34:06,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:34:07,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:34:07,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-17 12:34:07,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:34:07,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2023-11-17 12:34:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:34:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:34:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 12:34:07,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:34:07,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 19 [2023-11-17 12:34:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:34:07,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:34:07,966 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((~front~0 Int) (v_ArrVal_467 (Array Int Int))) (let ((.cse0 (+ ~front~0 1))) (or (< c_~n~0 .cse0) (< (let ((.cse1 (* ~front~0 4))) (+ (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse1)) c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))) (+ c_~W~0 1)) (= c_~n~0 .cse0) (< ~front~0 0)))) (= (mod |c_thread2Thread1of1ForFork0_~cond~1#1| 256) 0)) is different from false [2023-11-17 12:34:07,981 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((~front~0 Int) (v_ArrVal_467 (Array Int Int))) (let ((.cse0 (+ ~front~0 1))) (or (< c_~n~0 .cse0) (< (let ((.cse1 (* ~front~0 4))) (+ (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset .cse1)) c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467) c_~queue~0.base) (+ c_~queue~0.offset .cse1 4)))) (+ c_~W~0 1)) (= c_~n~0 .cse0) (< ~front~0 0)))) (= (mod c_~v_assert~0 256) 0)) is different from false [2023-11-17 12:34:08,022 WARN L854 $PredicateComparison]: unable to prove that (or (forall ((~front~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (let ((.cse0 (+ ~front~0 1))) (or (< c_~n~0 .cse0) (< (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466)) (.cse2 (* ~front~0 4))) (+ (select (select .cse1 c_~queue~0.base) (+ c_~queue~0.offset .cse2)) c_~d~0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467) c_~queue~0.base) (+ c_~queue~0.offset .cse2 4)))) (+ c_~W~0 1)) (= c_~n~0 .cse0) (< ~front~0 0)))) (= (mod c_~v_assert~0 256) 0)) is different from false [2023-11-17 12:34:08,220 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 12:34:08,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 244 [2023-11-17 12:34:08,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2023-11-17 12:34:08,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:34:08,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 26 [2023-11-17 12:34:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-17 12:34:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099840902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:34:08,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:34:08,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2023-11-17 12:34:08,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981472898] [2023-11-17 12:34:08,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:34:08,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-17 12:34:08,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:34:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-17 12:34:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1927, Unknown=3, NotChecked=276, Total=2450 [2023-11-17 12:34:08,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 52 [2023-11-17 12:34:08,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 2373 transitions, 35937 flow. Second operand has 50 states, 50 states have (on average 8.62) internal successors, (431), 50 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:34:08,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:34:08,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 52 [2023-11-17 12:34:08,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:34:15,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-17 12:34:23,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]