/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 10:09:01,780 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 10:09:01,847 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 10:09:01,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 10:09:01,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 10:09:01,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 10:09:01,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 10:09:01,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 10:09:01,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 10:09:01,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 10:09:01,881 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 10:09:01,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 10:09:01,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 10:09:01,882 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 10:09:01,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 10:09:01,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 10:09:01,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 10:09:01,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 10:09:01,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 10:09:01,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 10:09:01,883 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 10:09:01,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 10:09:01,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 10:09:01,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 10:09:01,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 10:09:01,884 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 10:09:01,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 10:09:01,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:09:01,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 10:09:01,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 10:09:01,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 10:09:01,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 10:09:01,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 10:09:01,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 10:09:01,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 10:09:01,886 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 10:09:02,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 10:09:02,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 10:09:02,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 10:09:02,119 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 10:09:02,119 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 10:09:02,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-24 10:09:03,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 10:09:03,171 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 10:09:03,171 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-24 10:09:03,176 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bb4d8cf2/541ed0b14d6e439f975ab7054178f49f/FLAGf6c0a7938 [2023-08-24 10:09:03,184 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bb4d8cf2/541ed0b14d6e439f975ab7054178f49f [2023-08-24 10:09:03,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 10:09:03,187 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 10:09:03,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 10:09:03,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 10:09:03,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 10:09:03,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac387ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03, skipping insertion in model container [2023-08-24 10:09:03,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,204 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 10:09:03,296 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-simple-queue.wvr.c[2438,2451] [2023-08-24 10:09:03,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:09:03,304 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 10:09:03,316 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-simple-queue.wvr.c[2438,2451] [2023-08-24 10:09:03,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:09:03,322 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 10:09:03,323 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 10:09:03,327 INFO L206 MainTranslator]: Completed translation [2023-08-24 10:09:03,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03 WrapperNode [2023-08-24 10:09:03,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 10:09:03,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 10:09:03,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 10:09:03,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 10:09:03,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,353 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 134 [2023-08-24 10:09:03,353 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 10:09:03,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 10:09:03,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 10:09:03,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 10:09:03,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 10:09:03,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 10:09:03,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 10:09:03,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 10:09:03,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (1/1) ... [2023-08-24 10:09:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:09:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:03,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 10:09:03,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 10:09:03,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 10:09:03,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 10:09:03,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 10:09:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 10:09:03,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 10:09:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 10:09:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 10:09:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 10:09:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 10:09:03,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 10:09:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 10:09:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 10:09:03,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 10:09:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 10:09:03,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 10:09:03,440 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 10:09:03,514 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 10:09:03,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 10:09:03,732 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 10:09:03,793 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 10:09:03,797 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 10:09:03,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:09:03 BoogieIcfgContainer [2023-08-24 10:09:03,799 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 10:09:03,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 10:09:03,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 10:09:03,802 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 10:09:03,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 10:09:03" (1/3) ... [2023-08-24 10:09:03,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a75b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:09:03, skipping insertion in model container [2023-08-24 10:09:03,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:09:03" (2/3) ... [2023-08-24 10:09:03,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a75b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:09:03, skipping insertion in model container [2023-08-24 10:09:03,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:09:03" (3/3) ... [2023-08-24 10:09:03,804 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-08-24 10:09:03,814 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 10:09:03,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 10:09:03,815 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 10:09:03,850 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 10:09:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2023-08-24 10:09:03,913 INFO L124 PetriNetUnfolderBase]: 9/114 cut-off events. [2023-08-24 10:09:03,913 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:09:03,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 10:09:03,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2023-08-24 10:09:03,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2023-08-24 10:09:03,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 10:09:03,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 224 flow [2023-08-24 10:09:03,932 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 224 flow [2023-08-24 10:09:03,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 224 flow [2023-08-24 10:09:03,963 INFO L124 PetriNetUnfolderBase]: 9/106 cut-off events. [2023-08-24 10:09:03,964 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:09:03,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 9/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 10:09:03,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-08-24 10:09:06,906 INFO L134 LiptonReduction]: Checked pairs total: 467 [2023-08-24 10:09:06,906 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-24 10:09:06,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 10:09:06,919 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@fa52780, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 10:09:06,920 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 10:09:06,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 10:09:06,923 INFO L124 PetriNetUnfolderBase]: 3/14 cut-off events. [2023-08-24 10:09:06,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:09:06,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:06,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:06,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:06,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash -540899872, now seen corresponding path program 1 times [2023-08-24 10:09:06,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:06,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004322717] [2023-08-24 10:09:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:06,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:07,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:07,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004322717] [2023-08-24 10:09:07,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004322717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:09:07,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:09:07,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 10:09:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618305280] [2023-08-24 10:09:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:09:07,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 10:09:07,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 10:09:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 10:09:07,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 225 [2023-08-24 10:09:07,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 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) [2023-08-24 10:09:07,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:07,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 225 [2023-08-24 10:09:07,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:07,310 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2023-08-24 10:09:07,310 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 10:09:07,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 132 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-08-24 10:09:07,311 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-08-24 10:09:07,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-08-24 10:09:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 10:09:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 10:09:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-24 10:09:07,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-08-24 10:09:07,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-24 10:09:07,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-24 10:09:07,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:07,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-24 10:09:07,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,337 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 324 transitions. [2023-08-24 10:09:07,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-08-24 10:09:07,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 10:09:07,340 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-08-24 10:09:07,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-08-24 10:09:07,343 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-08-24 10:09:07,343 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-08-24 10:09:07,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 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) [2023-08-24 10:09:07,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:07,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 10:09:07,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:07,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -553520926, now seen corresponding path program 1 times [2023-08-24 10:09:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:07,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95697414] [2023-08-24 10:09:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95697414] [2023-08-24 10:09:07,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95697414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:09:07,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:09:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 10:09:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688546336] [2023-08-24 10:09:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:09:07,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 10:09:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 10:09:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 10:09:07,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 225 [2023-08-24 10:09:07,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 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) [2023-08-24 10:09:07,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:07,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 225 [2023-08-24 10:09:07,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:07,572 INFO L124 PetriNetUnfolderBase]: 52/102 cut-off events. [2023-08-24 10:09:07,572 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-24 10:09:07,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 256 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-08-24 10:09:07,574 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-08-24 10:09:07,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-08-24 10:09:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 10:09:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 10:09:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-24 10:09:07,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46370370370370373 [2023-08-24 10:09:07,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-24 10:09:07,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-24 10:09:07,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:07,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-24 10:09:07,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,584 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 313 transitions. [2023-08-24 10:09:07,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-08-24 10:09:07,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 10:09:07,585 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-08-24 10:09:07,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-08-24 10:09:07,585 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-08-24 10:09:07,585 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-08-24 10:09:07,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 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) [2023-08-24 10:09:07,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:07,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 10:09:07,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:07,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -750794402, now seen corresponding path program 1 times [2023-08-24 10:09:07,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:07,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947614814] [2023-08-24 10:09:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:07,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:07,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:07,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947614814] [2023-08-24 10:09:07,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947614814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:09:07,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:09:07,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 10:09:07,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4799341] [2023-08-24 10:09:07,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:09:07,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 10:09:07,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 10:09:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 10:09:07,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 225 [2023-08-24 10:09:07,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:07,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 225 [2023-08-24 10:09:07,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:07,723 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-08-24 10:09:07,724 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-24 10:09:07,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 352 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-08-24 10:09:07,724 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-08-24 10:09:07,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-08-24 10:09:07,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 10:09:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 10:09:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-08-24 10:09:07,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211111111111111 [2023-08-24 10:09:07,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-08-24 10:09:07,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-08-24 10:09:07,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:07,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-08-24 10:09:07,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,729 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,729 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 379 transitions. [2023-08-24 10:09:07,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-08-24 10:09:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 10:09:07,730 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-08-24 10:09:07,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-24 10:09:07,730 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-08-24 10:09:07,730 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-08-24 10:09:07,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:07,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:07,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 10:09:07,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:07,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash -81331164, now seen corresponding path program 1 times [2023-08-24 10:09:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713487325] [2023-08-24 10:09:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:08,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:08,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713487325] [2023-08-24 10:09:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713487325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:08,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878569048] [2023-08-24 10:09:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:08,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:08,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 10:09:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:08,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 10:09:08,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:08,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 10:09:08,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:09:08,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:09:08,533 INFO L351 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 18 treesize of output 20 [2023-08-24 10:09:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:08,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:08,612 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-24 10:09:08,716 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:08,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-08-24 10:09:08,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:08,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-08-24 10:09:08,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:08,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2023-08-24 10:09:08,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-24 10:09:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878569048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:08,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-24 10:09:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209046090] [2023-08-24 10:09:08,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:08,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:09:08,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:09:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=220, Unknown=1, NotChecked=30, Total=306 [2023-08-24 10:09:08,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 225 [2023-08-24 10:09:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 18 states, 18 states have (on average 65.94444444444444) internal successors, (1187), 18 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:08,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:08,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 225 [2023-08-24 10:09:08,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:09,247 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4)))) (let ((.cse2 (forall ((v_ArrVal_73 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base) .cse1)))) (.cse0 (select |c_#memory_int| c_~queue~0.base))) (and (= (select .cse0 .cse1) 5) .cse2 (= 5 c_~x~0) (or .cse2 (<= c_~n~0 c_~back~0) (not (= 5 (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))))) (< c_~back~0 0))))) is different from false [2023-08-24 10:09:09,477 INFO L124 PetriNetUnfolderBase]: 237/447 cut-off events. [2023-08-24 10:09:09,477 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-08-24 10:09:09,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 447 events. 237/447 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1889 event pairs, 35 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 1099. Up to 111 conditions per place. [2023-08-24 10:09:09,479 INFO L140 encePairwiseOnDemand]: 214/225 looper letters, 61 selfloop transitions, 39 changer transitions 18/118 dead transitions. [2023-08-24 10:09:09,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 118 transitions, 603 flow [2023-08-24 10:09:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:09:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:09:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1139 transitions. [2023-08-24 10:09:09,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3163888888888889 [2023-08-24 10:09:09,482 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1139 transitions. [2023-08-24 10:09:09,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1139 transitions. [2023-08-24 10:09:09,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:09,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1139 transitions. [2023-08-24 10:09:09,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.1875) internal successors, (1139), 16 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:09,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:09,489 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:09,489 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 16 states and 1139 transitions. [2023-08-24 10:09:09,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 118 transitions, 603 flow [2023-08-24 10:09:09,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 118 transitions, 589 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-24 10:09:09,493 INFO L231 Difference]: Finished difference. Result has 43 places, 62 transitions, 389 flow [2023-08-24 10:09:09,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=389, PETRI_PLACES=43, PETRI_TRANSITIONS=62} [2023-08-24 10:09:09,494 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 24 predicate places. [2023-08-24 10:09:09,496 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 62 transitions, 389 flow [2023-08-24 10:09:09,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.94444444444444) internal successors, (1187), 18 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:09,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:09,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:09,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 10:09:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:09,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:09,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1109085066, now seen corresponding path program 2 times [2023-08-24 10:09:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127321729] [2023-08-24 10:09:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127321729] [2023-08-24 10:09:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127321729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619190437] [2023-08-24 10:09:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:09:09,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:09,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:09,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 10:09:09,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:09:09,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:09,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 10:09:09,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:09,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619190437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:10,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:10,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-24 10:09:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285410111] [2023-08-24 10:09:10,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:10,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 10:09:10,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 10:09:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-24 10:09:10,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 225 [2023-08-24 10:09:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 62 transitions, 389 flow. Second operand has 15 states, 15 states have (on average 86.8) internal successors, (1302), 15 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:10,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:10,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 225 [2023-08-24 10:09:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:10,217 INFO L124 PetriNetUnfolderBase]: 275/547 cut-off events. [2023-08-24 10:09:10,217 INFO L125 PetriNetUnfolderBase]: For 1106/1106 co-relation queries the response was YES. [2023-08-24 10:09:10,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2342 conditions, 547 events. 275/547 cut-off events. For 1106/1106 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2599 event pairs, 73 based on Foata normal form. 22/569 useless extension candidates. Maximal degree in co-relation 1668. Up to 278 conditions per place. [2023-08-24 10:09:10,220 INFO L140 encePairwiseOnDemand]: 220/225 looper letters, 50 selfloop transitions, 18 changer transitions 33/101 dead transitions. [2023-08-24 10:09:10,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 101 transitions, 803 flow [2023-08-24 10:09:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 10:09:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 10:09:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2023-08-24 10:09:10,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069135802469136 [2023-08-24 10:09:10,222 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2023-08-24 10:09:10,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2023-08-24 10:09:10,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:10,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2023-08-24 10:09:10,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.55555555555556) internal successors, (824), 9 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:10,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 225.0) internal successors, (2250), 10 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:10,226 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 225.0) internal successors, (2250), 10 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:10,226 INFO L175 Difference]: Start difference. First operand has 43 places, 62 transitions, 389 flow. Second operand 9 states and 824 transitions. [2023-08-24 10:09:10,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 101 transitions, 803 flow [2023-08-24 10:09:10,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 101 transitions, 753 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-24 10:09:10,230 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 364 flow [2023-08-24 10:09:10,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=364, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-24 10:09:10,231 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 32 predicate places. [2023-08-24 10:09:10,231 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 364 flow [2023-08-24 10:09:10,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.8) internal successors, (1302), 15 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:10,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:10,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:10,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:10,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:10,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash 46951318, now seen corresponding path program 3 times [2023-08-24 10:09:10,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:10,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28076060] [2023-08-24 10:09:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28076060] [2023-08-24 10:09:10,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28076060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339540844] [2023-08-24 10:09:10,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:09:10,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:10,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:10,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 10:09:10,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:09:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:10,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 10:09:10,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:10,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:10,917 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:09:10,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-24 10:09:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:09:10,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339540844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:10,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:10,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-08-24 10:09:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647933160] [2023-08-24 10:09:10,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:10,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:09:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:09:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:09:10,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:10,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 364 flow. Second operand has 11 states, 11 states have (on average 73.36363636363636) internal successors, (807), 11 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:10,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:10,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:10,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:11,149 INFO L124 PetriNetUnfolderBase]: 344/667 cut-off events. [2023-08-24 10:09:11,149 INFO L125 PetriNetUnfolderBase]: For 1838/1838 co-relation queries the response was YES. [2023-08-24 10:09:11,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 667 events. 344/667 cut-off events. For 1838/1838 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3328 event pairs, 75 based on Foata normal form. 3/670 useless extension candidates. Maximal degree in co-relation 2170. Up to 328 conditions per place. [2023-08-24 10:09:11,152 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 66 selfloop transitions, 30 changer transitions 16/112 dead transitions. [2023-08-24 10:09:11,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 112 transitions, 973 flow [2023-08-24 10:09:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 10:09:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 10:09:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 776 transitions. [2023-08-24 10:09:11,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448888888888889 [2023-08-24 10:09:11,155 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 776 transitions. [2023-08-24 10:09:11,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 776 transitions. [2023-08-24 10:09:11,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:11,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 776 transitions. [2023-08-24 10:09:11,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.6) internal successors, (776), 10 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:11,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 225.0) internal successors, (2475), 11 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:11,160 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 225.0) internal successors, (2475), 11 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:11,160 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 364 flow. Second operand 10 states and 776 transitions. [2023-08-24 10:09:11,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 112 transitions, 973 flow [2023-08-24 10:09:11,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 112 transitions, 949 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-24 10:09:11,164 INFO L231 Difference]: Finished difference. Result has 54 places, 62 transitions, 547 flow [2023-08-24 10:09:11,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=547, PETRI_PLACES=54, PETRI_TRANSITIONS=62} [2023-08-24 10:09:11,166 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-08-24 10:09:11,166 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 62 transitions, 547 flow [2023-08-24 10:09:11,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.36363636363636) internal successors, (807), 11 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:11,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:11,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:11,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:11,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:11,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:11,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:11,374 INFO L85 PathProgramCache]: Analyzing trace with hash 386639988, now seen corresponding path program 4 times [2023-08-24 10:09:11,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:11,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168768413] [2023-08-24 10:09:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:11,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168768413] [2023-08-24 10:09:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168768413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644119663] [2023-08-24 10:09:11,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:09:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:11,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:11,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 10:09:11,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:09:11,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:11,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 10:09:11,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:09:11,900 INFO L351 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 18 treesize of output 20 [2023-08-24 10:09:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:11,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:11,932 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_172 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_172) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-24 10:09:11,942 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:11,942 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-24 10:09:11,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-24 10:09:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-08-24 10:09:11,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644119663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:11,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:11,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 15 [2023-08-24 10:09:11,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543821089] [2023-08-24 10:09:11,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:11,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:09:11,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:09:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=200, Unknown=1, NotChecked=28, Total=272 [2023-08-24 10:09:11,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 225 [2023-08-24 10:09:11,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 62 transitions, 547 flow. Second operand has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:11,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:11,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 225 [2023-08-24 10:09:11,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:12,397 INFO L124 PetriNetUnfolderBase]: 474/907 cut-off events. [2023-08-24 10:09:12,397 INFO L125 PetriNetUnfolderBase]: For 3165/3165 co-relation queries the response was YES. [2023-08-24 10:09:12,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4439 conditions, 907 events. 474/907 cut-off events. For 3165/3165 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4760 event pairs, 116 based on Foata normal form. 3/910 useless extension candidates. Maximal degree in co-relation 2709. Up to 452 conditions per place. [2023-08-24 10:09:12,402 INFO L140 encePairwiseOnDemand]: 214/225 looper letters, 64 selfloop transitions, 40 changer transitions 28/132 dead transitions. [2023-08-24 10:09:12,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 132 transitions, 1274 flow [2023-08-24 10:09:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 10:09:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 10:09:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 885 transitions. [2023-08-24 10:09:12,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2023-08-24 10:09:12,404 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 885 transitions. [2023-08-24 10:09:12,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 885 transitions. [2023-08-24 10:09:12,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:12,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 885 transitions. [2023-08-24 10:09:12,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 73.75) internal successors, (885), 12 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:12,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 225.0) internal successors, (2925), 13 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:12,409 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 225.0) internal successors, (2925), 13 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:12,409 INFO L175 Difference]: Start difference. First operand has 54 places, 62 transitions, 547 flow. Second operand 12 states and 885 transitions. [2023-08-24 10:09:12,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 132 transitions, 1274 flow [2023-08-24 10:09:12,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 132 transitions, 1242 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-24 10:09:12,414 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 774 flow [2023-08-24 10:09:12,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=774, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2023-08-24 10:09:12,414 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-08-24 10:09:12,414 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 774 flow [2023-08-24 10:09:12,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:12,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:12,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:12,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:12,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:12,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:12,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1837124808, now seen corresponding path program 5 times [2023-08-24 10:09:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:12,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993090765] [2023-08-24 10:09:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:12,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:12,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:12,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993090765] [2023-08-24 10:09:12,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993090765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:12,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363046161] [2023-08-24 10:09:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:09:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:12,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:12,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 10:09:13,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:09:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:13,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 10:09:13,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:13,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:09:13,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:13,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2023-08-24 10:09:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:13,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:13,395 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:09:13,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-24 10:09:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:13,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363046161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:13,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:13,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 10:09:13,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705123256] [2023-08-24 10:09:13,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:13,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:09:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:09:13,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-08-24 10:09:13,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:13,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 774 flow. Second operand has 24 states, 24 states have (on average 73.0) internal successors, (1752), 24 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:13,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:13,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:13,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:15,187 INFO L124 PetriNetUnfolderBase]: 891/1724 cut-off events. [2023-08-24 10:09:15,187 INFO L125 PetriNetUnfolderBase]: For 10571/10571 co-relation queries the response was YES. [2023-08-24 10:09:15,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 1724 events. 891/1724 cut-off events. For 10571/10571 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10450 event pairs, 149 based on Foata normal form. 40/1764 useless extension candidates. Maximal degree in co-relation 9421. Up to 871 conditions per place. [2023-08-24 10:09:15,195 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 125 selfloop transitions, 39 changer transitions 160/324 dead transitions. [2023-08-24 10:09:15,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 324 transitions, 3482 flow [2023-08-24 10:09:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 10:09:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 10:09:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2687 transitions. [2023-08-24 10:09:15,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3512418300653595 [2023-08-24 10:09:15,202 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2687 transitions. [2023-08-24 10:09:15,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2687 transitions. [2023-08-24 10:09:15,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:15,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2687 transitions. [2023-08-24 10:09:15,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.02941176470588) internal successors, (2687), 34 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:15,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 225.0) internal successors, (7875), 35 states have internal predecessors, (7875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:15,215 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 225.0) internal successors, (7875), 35 states have internal predecessors, (7875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:15,215 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 774 flow. Second operand 34 states and 2687 transitions. [2023-08-24 10:09:15,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 324 transitions, 3482 flow [2023-08-24 10:09:15,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 324 transitions, 3390 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-08-24 10:09:15,226 INFO L231 Difference]: Finished difference. Result has 108 places, 90 transitions, 1005 flow [2023-08-24 10:09:15,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1005, PETRI_PLACES=108, PETRI_TRANSITIONS=90} [2023-08-24 10:09:15,228 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 89 predicate places. [2023-08-24 10:09:15,228 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 90 transitions, 1005 flow [2023-08-24 10:09:15,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 73.0) internal successors, (1752), 24 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:15,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:15,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:15,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:15,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:15,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:15,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:15,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2146450870, now seen corresponding path program 6 times [2023-08-24 10:09:15,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:15,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256331166] [2023-08-24 10:09:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:15,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:15,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:15,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256331166] [2023-08-24 10:09:15,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256331166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135886924] [2023-08-24 10:09:15,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:09:15,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:15,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:15,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:15,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 10:09:15,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:09:15,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:15,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 10:09:15,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:09:15,891 INFO L351 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 19 treesize of output 21 [2023-08-24 10:09:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:15,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:15,948 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_241) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) is different from false [2023-08-24 10:09:15,957 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:15,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-24 10:09:15,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 10:09:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 10:09:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135886924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:16,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:16,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2023-08-24 10:09:16,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78367724] [2023-08-24 10:09:16,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:16,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:09:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:09:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=368, Unknown=1, NotChecked=38, Total=462 [2023-08-24 10:09:16,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 225 [2023-08-24 10:09:16,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 90 transitions, 1005 flow. Second operand has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:16,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:16,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 225 [2023-08-24 10:09:16,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:16,719 INFO L124 PetriNetUnfolderBase]: 877/1660 cut-off events. [2023-08-24 10:09:16,719 INFO L125 PetriNetUnfolderBase]: For 11237/11237 co-relation queries the response was YES. [2023-08-24 10:09:16,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 1660 events. 877/1660 cut-off events. For 11237/11237 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9816 event pairs, 159 based on Foata normal form. 13/1673 useless extension candidates. Maximal degree in co-relation 10063. Up to 838 conditions per place. [2023-08-24 10:09:16,727 INFO L140 encePairwiseOnDemand]: 214/225 looper letters, 82 selfloop transitions, 65 changer transitions 39/186 dead transitions. [2023-08-24 10:09:16,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 186 transitions, 2265 flow [2023-08-24 10:09:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:09:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:09:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1176 transitions. [2023-08-24 10:09:16,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32666666666666666 [2023-08-24 10:09:16,731 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1176 transitions. [2023-08-24 10:09:16,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1176 transitions. [2023-08-24 10:09:16,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:16,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1176 transitions. [2023-08-24 10:09:16,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.5) internal successors, (1176), 16 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:16,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:16,738 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 225.0) internal successors, (3825), 17 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:16,738 INFO L175 Difference]: Start difference. First operand has 108 places, 90 transitions, 1005 flow. Second operand 16 states and 1176 transitions. [2023-08-24 10:09:16,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 186 transitions, 2265 flow [2023-08-24 10:09:16,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 186 transitions, 2076 flow, removed 83 selfloop flow, removed 23 redundant places. [2023-08-24 10:09:16,754 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 1414 flow [2023-08-24 10:09:16,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1414, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2023-08-24 10:09:16,755 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 71 predicate places. [2023-08-24 10:09:16,755 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 1414 flow [2023-08-24 10:09:16,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.86363636363636) internal successors, (1515), 22 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:16,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:16,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:16,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:16,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:16,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:16,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2114839340, now seen corresponding path program 7 times [2023-08-24 10:09:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:16,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302729897] [2023-08-24 10:09:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:09:17,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:17,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302729897] [2023-08-24 10:09:17,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302729897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:17,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845129278] [2023-08-24 10:09:17,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:09:17,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:17,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:17,042 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:17,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 10:09:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:17,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 10:09:17,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:09:17,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:09:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845129278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:17,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:17,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 11 [2023-08-24 10:09:17,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441880052] [2023-08-24 10:09:17,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:09:17,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:09:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:09:17,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 225 [2023-08-24 10:09:17,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 1414 flow. Second operand has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:17,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:17,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 225 [2023-08-24 10:09:17,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:17,429 INFO L124 PetriNetUnfolderBase]: 1121/2180 cut-off events. [2023-08-24 10:09:17,429 INFO L125 PetriNetUnfolderBase]: For 19664/19664 co-relation queries the response was YES. [2023-08-24 10:09:17,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14745 conditions, 2180 events. 1121/2180 cut-off events. For 19664/19664 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13913 event pairs, 258 based on Foata normal form. 24/2204 useless extension candidates. Maximal degree in co-relation 13787. Up to 1114 conditions per place. [2023-08-24 10:09:17,440 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 83 selfloop transitions, 79 changer transitions 7/169 dead transitions. [2023-08-24 10:09:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 169 transitions, 2473 flow [2023-08-24 10:09:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:09:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:09:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-08-24 10:09:17,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693333333333333 [2023-08-24 10:09:17,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-08-24 10:09:17,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-08-24 10:09:17,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:17,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-08-24 10:09:17,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:17,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:17,444 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:17,444 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 1414 flow. Second operand 5 states and 528 transitions. [2023-08-24 10:09:17,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 169 transitions, 2473 flow [2023-08-24 10:09:17,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 169 transitions, 2146 flow, removed 130 selfloop flow, removed 12 redundant places. [2023-08-24 10:09:17,505 INFO L231 Difference]: Finished difference. Result has 83 places, 138 transitions, 1818 flow [2023-08-24 10:09:17,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1818, PETRI_PLACES=83, PETRI_TRANSITIONS=138} [2023-08-24 10:09:17,505 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 64 predicate places. [2023-08-24 10:09:17,505 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 138 transitions, 1818 flow [2023-08-24 10:09:17,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:17,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:17,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:17,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:17,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:17,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:17,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:17,710 INFO L85 PathProgramCache]: Analyzing trace with hash 486256012, now seen corresponding path program 8 times [2023-08-24 10:09:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:17,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926272488] [2023-08-24 10:09:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 10:09:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:17,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926272488] [2023-08-24 10:09:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926272488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437012951] [2023-08-24 10:09:17,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:09:17,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:17,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:17,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 10:09:17,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:09:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:17,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 10:09:17,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 10:09:17,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 10:09:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437012951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:18,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 10:09:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229711744] [2023-08-24 10:09:18,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:09:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:09:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-08-24 10:09:18,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 225 [2023-08-24 10:09:18,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 138 transitions, 1818 flow. Second operand has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:18,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:18,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 225 [2023-08-24 10:09:18,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:18,266 INFO L124 PetriNetUnfolderBase]: 817/1573 cut-off events. [2023-08-24 10:09:18,266 INFO L125 PetriNetUnfolderBase]: For 14599/14599 co-relation queries the response was YES. [2023-08-24 10:09:18,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11208 conditions, 1573 events. 817/1573 cut-off events. For 14599/14599 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9518 event pairs, 505 based on Foata normal form. 8/1581 useless extension candidates. Maximal degree in co-relation 9810. Up to 1493 conditions per place. [2023-08-24 10:09:18,276 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 99 selfloop transitions, 4 changer transitions 15/118 dead transitions. [2023-08-24 10:09:18,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 1867 flow [2023-08-24 10:09:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 10:09:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 10:09:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 721 transitions. [2023-08-24 10:09:18,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40055555555555555 [2023-08-24 10:09:18,278 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 721 transitions. [2023-08-24 10:09:18,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 721 transitions. [2023-08-24 10:09:18,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:18,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 721 transitions. [2023-08-24 10:09:18,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.125) internal successors, (721), 8 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:18,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:18,282 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 225.0) internal successors, (2025), 9 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:18,282 INFO L175 Difference]: Start difference. First operand has 83 places, 138 transitions, 1818 flow. Second operand 8 states and 721 transitions. [2023-08-24 10:09:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 1867 flow [2023-08-24 10:09:18,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 1778 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-24 10:09:18,299 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 1412 flow [2023-08-24 10:09:18,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2023-08-24 10:09:18,300 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 62 predicate places. [2023-08-24 10:09:18,300 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 1412 flow [2023-08-24 10:09:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:18,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:18,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:18,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:18,506 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,SelfDestructingSolverStorable10 [2023-08-24 10:09:18,506 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:18,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash -959190760, now seen corresponding path program 9 times [2023-08-24 10:09:18,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:18,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307260939] [2023-08-24 10:09:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:18,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:18,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307260939] [2023-08-24 10:09:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307260939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873740639] [2023-08-24 10:09:18,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:09:18,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:18,937 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:18,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 10:09:19,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 10:09:19,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:19,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 10:09:19,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:19,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-24 10:09:19,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 10:09:19,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:09:19,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:09:19,506 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:09:19,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-24 10:09:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:19,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:19,881 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:19,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-08-24 10:09:19,890 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:09:19,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 279 [2023-08-24 10:09:19,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:09:19,898 INFO L351 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 93 treesize of output 80 [2023-08-24 10:09:19,904 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-24 10:09:19,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 67 [2023-08-24 10:09:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873740639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:20,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:20,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-08-24 10:09:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483074566] [2023-08-24 10:09:20,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:20,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 10:09:20,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 10:09:20,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1021, Unknown=5, NotChecked=0, Total=1190 [2023-08-24 10:09:20,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 225 [2023-08-24 10:09:20,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 1412 flow. Second operand has 35 states, 35 states have (on average 65.62857142857143) internal successors, (2297), 35 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:20,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:20,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 225 [2023-08-24 10:09:20,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:20,571 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1))) (and (or (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0) (let ((.cse1 (< c_~n~0 (+ c_~back~0 3)))) (and (or (< c_~front~0 .cse0) .cse1) (or (< c_~n~0 (+ c_~front~0 4)) .cse1)))) (forall ((v_~back~0_102 Int)) (or (< v_~back~0_102 .cse0) (<= c_~n~0 v_~back~0_102) (< v_~back~0_102 0) (forall ((v_ArrVal_353 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_353) c_~queue~0.base))) (or (not (= 5 (select .cse2 (+ c_~queue~0.offset (* v_~back~0_102 4))))) (= (select .cse2 (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)))))) (= 5 c_~x~0))) is different from false [2023-08-24 10:09:20,753 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4) 8))) (and (forall ((v_~back~0_102 Int)) (or (< v_~back~0_102 (+ c_~back~0 1)) (<= c_~n~0 v_~back~0_102) (< v_~back~0_102 0) (forall ((v_ArrVal_353 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_353) c_~queue~0.base))) (or (not (= 5 (select .cse0 (+ c_~queue~0.offset (* v_~back~0_102 4))))) (= (select .cse0 .cse1) 5)))))) (or (forall ((v_ArrVal_353 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_353) c_~queue~0.base))) (or (not (= 5 (select .cse2 (+ c_~queue~0.offset (* c_~back~0 4))))) (= (select .cse2 .cse1) 5)))) (<= c_~n~0 c_~back~0) (< c_~back~0 0)))) is different from false [2023-08-24 10:09:20,937 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1))) (and (or (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0) (let ((.cse1 (< c_~n~0 (+ c_~back~0 3)))) (and (or (< c_~front~0 .cse0) .cse1) (or (< c_~n~0 (+ c_~front~0 4)) .cse1)))) (forall ((v_~back~0_102 Int)) (or (< v_~back~0_102 .cse0) (<= c_~n~0 v_~back~0_102) (< v_~back~0_102 0) (forall ((v_ArrVal_353 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_353) c_~queue~0.base))) (or (not (= 5 (select .cse2 (+ c_~queue~0.offset (* v_~back~0_102 4))))) (= (select .cse2 (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)))))))) is different from false [2023-08-24 10:09:21,098 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1)) (.cse3 (* c_~front~0 4)) (.cse2 (select |c_#memory_int| c_~queue~0.base))) (and (or (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0) (let ((.cse1 (< c_~n~0 (+ c_~back~0 3)))) (and (or (< c_~front~0 .cse0) .cse1) (or (< c_~n~0 (+ c_~front~0 4)) .cse1)))) (= 5 (select .cse2 .cse3)) (forall ((v_~back~0_102 Int)) (or (< v_~back~0_102 .cse0) (<= c_~n~0 v_~back~0_102) (< v_~back~0_102 0) (forall ((v_ArrVal_353 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_353) c_~queue~0.base))) (or (not (= 5 (select .cse4 (+ c_~queue~0.offset (* v_~back~0_102 4))))) (= (select .cse4 (+ c_~queue~0.offset .cse3 8)) 5)))))) (<= 2 c_~front~0) (= c_~queue~0.offset 0) (exists ((v_~back~0_101 Int)) (and (= 5 (select .cse2 (+ c_~queue~0.offset (* v_~back~0_101 4)))) (<= v_~back~0_101 2) (<= c_~front~0 v_~back~0_101))))) is different from false [2023-08-24 10:09:23,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:09:29,866 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] [2023-08-24 10:09:30,055 INFO L124 PetriNetUnfolderBase]: 2080/3878 cut-off events. [2023-08-24 10:09:30,055 INFO L125 PetriNetUnfolderBase]: For 32544/32544 co-relation queries the response was YES. [2023-08-24 10:09:30,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26637 conditions, 3878 events. 2080/3878 cut-off events. For 32544/32544 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25923 event pairs, 232 based on Foata normal form. 18/3896 useless extension candidates. Maximal degree in co-relation 26586. Up to 2087 conditions per place. [2023-08-24 10:09:30,073 INFO L140 encePairwiseOnDemand]: 216/225 looper letters, 349 selfloop transitions, 180 changer transitions 80/609 dead transitions. [2023-08-24 10:09:30,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 609 transitions, 8012 flow [2023-08-24 10:09:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-24 10:09:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-24 10:09:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4324 transitions. [2023-08-24 10:09:30,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202962962962963 [2023-08-24 10:09:30,077 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4324 transitions. [2023-08-24 10:09:30,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4324 transitions. [2023-08-24 10:09:30,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:30,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4324 transitions. [2023-08-24 10:09:30,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 72.06666666666666) internal successors, (4324), 60 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:30,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 225.0) internal successors, (13725), 61 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:30,092 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 225.0) internal successors, (13725), 61 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:30,093 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 1412 flow. Second operand 60 states and 4324 transitions. [2023-08-24 10:09:30,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 609 transitions, 8012 flow [2023-08-24 10:09:30,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 609 transitions, 7662 flow, removed 171 selfloop flow, removed 6 redundant places. [2023-08-24 10:09:30,121 INFO L231 Difference]: Finished difference. Result has 155 places, 269 transitions, 4370 flow [2023-08-24 10:09:30,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4370, PETRI_PLACES=155, PETRI_TRANSITIONS=269} [2023-08-24 10:09:30,121 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 136 predicate places. [2023-08-24 10:09:30,121 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 269 transitions, 4370 flow [2023-08-24 10:09:30,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 65.62857142857143) internal successors, (2297), 35 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:30,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:30,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:30,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 10:09:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:30,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:30,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1069734650, now seen corresponding path program 10 times [2023-08-24 10:09:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:30,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59983910] [2023-08-24 10:09:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:30,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59983910] [2023-08-24 10:09:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59983910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122598176] [2023-08-24 10:09:30,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:09:30,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:30,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:30,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:30,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 10:09:30,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:09:30,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:30,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 10:09:30,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:30,996 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:09:30,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-24 10:09:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:31,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:31,037 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:09:31,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-24 10:09:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:31,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122598176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:31,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:31,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 10:09:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333070819] [2023-08-24 10:09:31,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:31,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 10:09:31,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 10:09:31,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 10:09:31,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:31,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 269 transitions, 4370 flow. Second operand has 33 states, 33 states have (on average 72.54545454545455) internal successors, (2394), 33 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:31,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:31,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:31,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:33,818 INFO L124 PetriNetUnfolderBase]: 1418/2807 cut-off events. [2023-08-24 10:09:33,818 INFO L125 PetriNetUnfolderBase]: For 51348/51348 co-relation queries the response was YES. [2023-08-24 10:09:33,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24825 conditions, 2807 events. 1418/2807 cut-off events. For 51348/51348 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19179 event pairs, 130 based on Foata normal form. 124/2931 useless extension candidates. Maximal degree in co-relation 24766. Up to 1467 conditions per place. [2023-08-24 10:09:33,834 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 184 selfloop transitions, 145 changer transitions 151/480 dead transitions. [2023-08-24 10:09:33,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 480 transitions, 7648 flow [2023-08-24 10:09:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 10:09:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 10:09:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3944 transitions. [2023-08-24 10:09:33,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35057777777777777 [2023-08-24 10:09:33,838 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3944 transitions. [2023-08-24 10:09:33,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3944 transitions. [2023-08-24 10:09:33,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:33,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3944 transitions. [2023-08-24 10:09:33,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 78.88) internal successors, (3944), 50 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:33,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 225.0) internal successors, (11475), 51 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:33,850 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 225.0) internal successors, (11475), 51 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:33,850 INFO L175 Difference]: Start difference. First operand has 155 places, 269 transitions, 4370 flow. Second operand 50 states and 3944 transitions. [2023-08-24 10:09:33,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 480 transitions, 7648 flow [2023-08-24 10:09:33,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 480 transitions, 6818 flow, removed 385 selfloop flow, removed 21 redundant places. [2023-08-24 10:09:33,899 INFO L231 Difference]: Finished difference. Result has 160 places, 173 transitions, 3053 flow [2023-08-24 10:09:33,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3053, PETRI_PLACES=160, PETRI_TRANSITIONS=173} [2023-08-24 10:09:33,900 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 141 predicate places. [2023-08-24 10:09:33,900 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 173 transitions, 3053 flow [2023-08-24 10:09:33,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.54545454545455) internal successors, (2394), 33 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:33,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:33,901 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:33,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:34,105 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,SelfDestructingSolverStorable12 [2023-08-24 10:09:34,105 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:34,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1345048986, now seen corresponding path program 11 times [2023-08-24 10:09:34,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:34,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806380443] [2023-08-24 10:09:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:34,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:34,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806380443] [2023-08-24 10:09:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806380443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:34,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422511355] [2023-08-24 10:09:34,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:09:34,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:34,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:34,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:34,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 10:09:34,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 10:09:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:34,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 10:09:34,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 10:09:34,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:34,650 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:09:34,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:09:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 10:09:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422511355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:34,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:34,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-08-24 10:09:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247407476] [2023-08-24 10:09:34,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 10:09:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 10:09:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-08-24 10:09:34,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:34,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 173 transitions, 3053 flow. Second operand has 20 states, 20 states have (on average 73.0) internal successors, (1460), 20 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:34,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:34,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:34,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:36,576 INFO L124 PetriNetUnfolderBase]: 1786/3485 cut-off events. [2023-08-24 10:09:36,576 INFO L125 PetriNetUnfolderBase]: For 53396/53396 co-relation queries the response was YES. [2023-08-24 10:09:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29810 conditions, 3485 events. 1786/3485 cut-off events. For 53396/53396 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24749 event pairs, 194 based on Foata normal form. 11/3496 useless extension candidates. Maximal degree in co-relation 29754. Up to 1850 conditions per place. [2023-08-24 10:09:36,595 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 133 selfloop transitions, 158 changer transitions 187/478 dead transitions. [2023-08-24 10:09:36,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 478 transitions, 7504 flow [2023-08-24 10:09:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 10:09:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 10:09:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3541 transitions. [2023-08-24 10:09:36,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34972839506172837 [2023-08-24 10:09:36,599 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3541 transitions. [2023-08-24 10:09:36,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3541 transitions. [2023-08-24 10:09:36,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:36,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3541 transitions. [2023-08-24 10:09:36,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.68888888888888) internal successors, (3541), 45 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:36,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 225.0) internal successors, (10350), 46 states have internal predecessors, (10350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:36,609 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 225.0) internal successors, (10350), 46 states have internal predecessors, (10350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:36,609 INFO L175 Difference]: Start difference. First operand has 160 places, 173 transitions, 3053 flow. Second operand 45 states and 3541 transitions. [2023-08-24 10:09:36,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 478 transitions, 7504 flow [2023-08-24 10:09:36,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 478 transitions, 6720 flow, removed 310 selfloop flow, removed 24 redundant places. [2023-08-24 10:09:36,738 INFO L231 Difference]: Finished difference. Result has 184 places, 188 transitions, 3323 flow [2023-08-24 10:09:36,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3323, PETRI_PLACES=184, PETRI_TRANSITIONS=188} [2023-08-24 10:09:36,738 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 165 predicate places. [2023-08-24 10:09:36,738 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 188 transitions, 3323 flow [2023-08-24 10:09:36,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 73.0) internal successors, (1460), 20 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:36,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:36,739 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:36,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:36,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 10:09:36,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:36,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1310918882, now seen corresponding path program 12 times [2023-08-24 10:09:36,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:36,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469670765] [2023-08-24 10:09:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:36,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:37,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469670765] [2023-08-24 10:09:37,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469670765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111304374] [2023-08-24 10:09:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:09:37,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:37,572 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:37,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 10:09:37,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 10:09:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:37,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 10:09:37,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:09:37,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:37,833 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:09:37,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:09:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:09:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111304374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:37,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:37,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 20 [2023-08-24 10:09:37,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339588634] [2023-08-24 10:09:37,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:09:37,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:09:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-24 10:09:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:37,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 188 transitions, 3323 flow. Second operand has 22 states, 22 states have (on average 72.86363636363636) internal successors, (1603), 22 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:37,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:37,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:37,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:39,555 INFO L124 PetriNetUnfolderBase]: 2211/4263 cut-off events. [2023-08-24 10:09:39,555 INFO L125 PetriNetUnfolderBase]: For 60051/60051 co-relation queries the response was YES. [2023-08-24 10:09:39,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34904 conditions, 4263 events. 2211/4263 cut-off events. For 60051/60051 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 30764 event pairs, 199 based on Foata normal form. 2/4265 useless extension candidates. Maximal degree in co-relation 34849. Up to 2265 conditions per place. [2023-08-24 10:09:39,578 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 181 selfloop transitions, 217 changer transitions 147/545 dead transitions. [2023-08-24 10:09:39,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 545 transitions, 8574 flow [2023-08-24 10:09:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 10:09:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 10:09:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3861 transitions. [2023-08-24 10:09:39,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35020408163265304 [2023-08-24 10:09:39,584 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3861 transitions. [2023-08-24 10:09:39,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3861 transitions. [2023-08-24 10:09:39,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:39,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3861 transitions. [2023-08-24 10:09:39,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 78.79591836734694) internal successors, (3861), 49 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:39,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 225.0) internal successors, (11250), 50 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:39,593 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 225.0) internal successors, (11250), 50 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:39,593 INFO L175 Difference]: Start difference. First operand has 184 places, 188 transitions, 3323 flow. Second operand 49 states and 3861 transitions. [2023-08-24 10:09:39,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 545 transitions, 8574 flow [2023-08-24 10:09:39,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 545 transitions, 8189 flow, removed 38 selfloop flow, removed 18 redundant places. [2023-08-24 10:09:39,812 INFO L231 Difference]: Finished difference. Result has 201 places, 246 transitions, 4573 flow [2023-08-24 10:09:39,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4573, PETRI_PLACES=201, PETRI_TRANSITIONS=246} [2023-08-24 10:09:39,813 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 182 predicate places. [2023-08-24 10:09:39,813 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 246 transitions, 4573 flow [2023-08-24 10:09:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 72.86363636363636) internal successors, (1603), 22 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:39,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:39,814 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:39,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 10:09:40,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:40,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1345829388, now seen corresponding path program 13 times [2023-08-24 10:09:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155781258] [2023-08-24 10:09:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:40,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155781258] [2023-08-24 10:09:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155781258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442484703] [2023-08-24 10:09:40,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:09:40,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:40,640 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:40,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 10:09:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:40,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 10:09:40,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:40,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:09:40,926 INFO L351 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 19 treesize of output 21 [2023-08-24 10:09:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:40,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:41,062 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:41,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-24 10:09:41,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 10:09:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:09:41,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442484703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:41,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:41,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 29 [2023-08-24 10:09:41,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904105427] [2023-08-24 10:09:41,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:41,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 10:09:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:41,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 10:09:41,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=838, Unknown=6, NotChecked=0, Total=930 [2023-08-24 10:09:41,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 225 [2023-08-24 10:09:41,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 246 transitions, 4573 flow. Second operand has 31 states, 31 states have (on average 68.61290322580645) internal successors, (2127), 31 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:41,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:41,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 225 [2023-08-24 10:09:41,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:42,646 INFO L124 PetriNetUnfolderBase]: 2469/4731 cut-off events. [2023-08-24 10:09:42,646 INFO L125 PetriNetUnfolderBase]: For 66119/66119 co-relation queries the response was YES. [2023-08-24 10:09:42,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39075 conditions, 4731 events. 2469/4731 cut-off events. For 66119/66119 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34572 event pairs, 246 based on Foata normal form. 1/4732 useless extension candidates. Maximal degree in co-relation 39021. Up to 2524 conditions per place. [2023-08-24 10:09:42,670 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 95 selfloop transitions, 235 changer transitions 61/391 dead transitions. [2023-08-24 10:09:42,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 391 transitions, 6956 flow [2023-08-24 10:09:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 10:09:42,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 10:09:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1779 transitions. [2023-08-24 10:09:42,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32944444444444443 [2023-08-24 10:09:42,683 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1779 transitions. [2023-08-24 10:09:42,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1779 transitions. [2023-08-24 10:09:42,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:42,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1779 transitions. [2023-08-24 10:09:42,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 74.125) internal successors, (1779), 24 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:42,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 225.0) internal successors, (5625), 25 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:42,689 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 225.0) internal successors, (5625), 25 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:42,689 INFO L175 Difference]: Start difference. First operand has 201 places, 246 transitions, 4573 flow. Second operand 24 states and 1779 transitions. [2023-08-24 10:09:42,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 391 transitions, 6956 flow [2023-08-24 10:09:42,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 391 transitions, 6600 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-08-24 10:09:42,827 INFO L231 Difference]: Finished difference. Result has 209 places, 268 transitions, 5087 flow [2023-08-24 10:09:42,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5087, PETRI_PLACES=209, PETRI_TRANSITIONS=268} [2023-08-24 10:09:42,827 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 190 predicate places. [2023-08-24 10:09:42,827 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 268 transitions, 5087 flow [2023-08-24 10:09:42,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 68.61290322580645) internal successors, (2127), 31 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:42,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:42,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:42,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 10:09:43,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 10:09:43,028 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:43,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2022051980, now seen corresponding path program 14 times [2023-08-24 10:09:43,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:43,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277736206] [2023-08-24 10:09:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:43,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:09:43,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:43,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277736206] [2023-08-24 10:09:43,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277736206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:43,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723647704] [2023-08-24 10:09:43,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:09:43,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:43,124 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:43,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 10:09:43,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:09:43,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:43,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 10:09:43,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:09:43,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:09:43,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723647704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:43,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:43,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 14 [2023-08-24 10:09:43,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682222309] [2023-08-24 10:09:43,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 10:09:43,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:43,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 10:09:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2023-08-24 10:09:43,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 225 [2023-08-24 10:09:43,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 268 transitions, 5087 flow. Second operand has 15 states, 15 states have (on average 98.93333333333334) internal successors, (1484), 15 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:43,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:43,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 225 [2023-08-24 10:09:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:44,366 INFO L124 PetriNetUnfolderBase]: 4077/7674 cut-off events. [2023-08-24 10:09:44,366 INFO L125 PetriNetUnfolderBase]: For 120428/120428 co-relation queries the response was YES. [2023-08-24 10:09:44,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65295 conditions, 7674 events. 4077/7674 cut-off events. For 120428/120428 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 59363 event pairs, 756 based on Foata normal form. 36/7710 useless extension candidates. Maximal degree in co-relation 65240. Up to 4178 conditions per place. [2023-08-24 10:09:44,402 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 123 selfloop transitions, 222 changer transitions 57/402 dead transitions. [2023-08-24 10:09:44,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 402 transitions, 8788 flow [2023-08-24 10:09:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 10:09:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 10:09:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-08-24 10:09:44,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4703703703703704 [2023-08-24 10:09:44,404 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-08-24 10:09:44,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-08-24 10:09:44,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:44,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-08-24 10:09:44,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:44,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 225.0) internal successors, (1575), 7 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:44,406 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 225.0) internal successors, (1575), 7 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:44,406 INFO L175 Difference]: Start difference. First operand has 209 places, 268 transitions, 5087 flow. Second operand 6 states and 635 transitions. [2023-08-24 10:09:44,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 402 transitions, 8788 flow [2023-08-24 10:09:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 402 transitions, 8639 flow, removed 38 selfloop flow, removed 11 redundant places. [2023-08-24 10:09:44,613 INFO L231 Difference]: Finished difference. Result has 203 places, 311 transitions, 7007 flow [2023-08-24 10:09:44,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=4921, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7007, PETRI_PLACES=203, PETRI_TRANSITIONS=311} [2023-08-24 10:09:44,614 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 184 predicate places. [2023-08-24 10:09:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 311 transitions, 7007 flow [2023-08-24 10:09:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.93333333333334) internal successors, (1484), 15 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:44,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:44,614 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:44,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-24 10:09:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:44,818 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:44,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 527379626, now seen corresponding path program 15 times [2023-08-24 10:09:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786606342] [2023-08-24 10:09:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:44,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786606342] [2023-08-24 10:09:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786606342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538691700] [2023-08-24 10:09:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:09:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:45,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:45,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 10:09:45,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 10:09:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:45,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 10:09:45,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-24 10:09:45,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:45,649 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:09:45,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:09:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-24 10:09:45,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538691700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:45,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:45,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-08-24 10:09:45,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91592538] [2023-08-24 10:09:45,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 10:09:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 10:09:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-08-24 10:09:45,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:45,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 311 transitions, 7007 flow. Second operand has 23 states, 23 states have (on average 72.65217391304348) internal successors, (1671), 23 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:45,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:45,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:48,997 INFO L124 PetriNetUnfolderBase]: 3940/7401 cut-off events. [2023-08-24 10:09:48,997 INFO L125 PetriNetUnfolderBase]: For 128516/128516 co-relation queries the response was YES. [2023-08-24 10:09:49,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65740 conditions, 7401 events. 3940/7401 cut-off events. For 128516/128516 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56960 event pairs, 244 based on Foata normal form. 186/7587 useless extension candidates. Maximal degree in co-relation 65685. Up to 4008 conditions per place. [2023-08-24 10:09:49,034 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 205 selfloop transitions, 294 changer transitions 383/882 dead transitions. [2023-08-24 10:09:49,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 882 transitions, 15038 flow [2023-08-24 10:09:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-24 10:09:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-24 10:09:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6721 transitions. [2023-08-24 10:09:49,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3514248366013072 [2023-08-24 10:09:49,041 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6721 transitions. [2023-08-24 10:09:49,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6721 transitions. [2023-08-24 10:09:49,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:49,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6721 transitions. [2023-08-24 10:09:49,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 79.07058823529412) internal successors, (6721), 85 states have internal predecessors, (6721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:49,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 225.0) internal successors, (19350), 86 states have internal predecessors, (19350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:49,059 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 225.0) internal successors, (19350), 86 states have internal predecessors, (19350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:49,060 INFO L175 Difference]: Start difference. First operand has 203 places, 311 transitions, 7007 flow. Second operand 85 states and 6721 transitions. [2023-08-24 10:09:49,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 882 transitions, 15038 flow [2023-08-24 10:09:49,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 882 transitions, 12373 flow, removed 1183 selfloop flow, removed 18 redundant places. [2023-08-24 10:09:49,291 INFO L231 Difference]: Finished difference. Result has 256 places, 320 transitions, 6803 flow [2023-08-24 10:09:49,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=6803, PETRI_PLACES=256, PETRI_TRANSITIONS=320} [2023-08-24 10:09:49,292 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 237 predicate places. [2023-08-24 10:09:49,292 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 320 transitions, 6803 flow [2023-08-24 10:09:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 72.65217391304348) internal successors, (1671), 23 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:49,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:49,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:49,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 10:09:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 10:09:49,497 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:49,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1668335048, now seen corresponding path program 16 times [2023-08-24 10:09:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:49,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637647364] [2023-08-24 10:09:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637647364] [2023-08-24 10:09:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637647364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711374920] [2023-08-24 10:09:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:09:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:49,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 10:09:50,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:09:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:50,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 10:09:50,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:09:50,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:50,276 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:09:50,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:09:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:09:50,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711374920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:50,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:50,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 25 [2023-08-24 10:09:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754182295] [2023-08-24 10:09:50,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:50,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 10:09:50,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:50,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 10:09:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2023-08-24 10:09:50,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:09:50,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 320 transitions, 6803 flow. Second operand has 27 states, 27 states have (on average 72.70370370370371) internal successors, (1963), 27 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:50,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:50,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:09:50,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:09:53,227 INFO L124 PetriNetUnfolderBase]: 3603/6795 cut-off events. [2023-08-24 10:09:53,227 INFO L125 PetriNetUnfolderBase]: For 102203/102203 co-relation queries the response was YES. [2023-08-24 10:09:53,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52636 conditions, 6795 events. 3603/6795 cut-off events. For 102203/102203 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51938 event pairs, 233 based on Foata normal form. 2/6797 useless extension candidates. Maximal degree in co-relation 52568. Up to 3721 conditions per place. [2023-08-24 10:09:53,264 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 251 selfloop transitions, 306 changer transitions 245/802 dead transitions. [2023-08-24 10:09:53,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 802 transitions, 12550 flow [2023-08-24 10:09:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-24 10:09:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-24 10:09:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 6061 transitions. [2023-08-24 10:09:53,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34984126984126984 [2023-08-24 10:09:53,270 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 6061 transitions. [2023-08-24 10:09:53,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 6061 transitions. [2023-08-24 10:09:53,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:09:53,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 6061 transitions. [2023-08-24 10:09:53,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 78.71428571428571) internal successors, (6061), 77 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:53,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 225.0) internal successors, (17550), 78 states have internal predecessors, (17550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:53,287 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 225.0) internal successors, (17550), 78 states have internal predecessors, (17550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:53,287 INFO L175 Difference]: Start difference. First operand has 256 places, 320 transitions, 6803 flow. Second operand 77 states and 6061 transitions. [2023-08-24 10:09:53,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 802 transitions, 12550 flow [2023-08-24 10:09:53,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 802 transitions, 11821 flow, removed 148 selfloop flow, removed 23 redundant places. [2023-08-24 10:09:53,769 INFO L231 Difference]: Finished difference. Result has 295 places, 330 transitions, 6946 flow [2023-08-24 10:09:53,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=6946, PETRI_PLACES=295, PETRI_TRANSITIONS=330} [2023-08-24 10:09:53,770 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 276 predicate places. [2023-08-24 10:09:53,770 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 330 transitions, 6946 flow [2023-08-24 10:09:53,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 72.70370370370371) internal successors, (1963), 27 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:53,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:53,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:53,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-24 10:09:53,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:53,971 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:53,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1031011658, now seen corresponding path program 17 times [2023-08-24 10:09:53,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:53,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781907691] [2023-08-24 10:09:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781907691] [2023-08-24 10:09:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781907691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810422800] [2023-08-24 10:09:54,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:09:54,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:54,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:54,472 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:09:54,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 10:09:54,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 10:09:54,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:54,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 10:09:54,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:09:54,854 INFO L351 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 18 treesize of output 20 [2023-08-24 10:09:55,022 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:09:55,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-24 10:09:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:55,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:55,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:55,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-24 10:09:55,189 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 10:09:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:09:55,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810422800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:55,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:55,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 10:09:55,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308291603] [2023-08-24 10:09:55,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:55,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 10:09:55,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 10:09:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1752, Unknown=2, NotChecked=0, Total=1980 [2023-08-24 10:09:55,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 225 [2023-08-24 10:09:55,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 330 transitions, 6946 flow. Second operand has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 225 [2023-08-24 10:09:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:10:09,519 INFO L124 PetriNetUnfolderBase]: 7621/14170 cut-off events. [2023-08-24 10:10:09,519 INFO L125 PetriNetUnfolderBase]: For 245382/245382 co-relation queries the response was YES. [2023-08-24 10:10:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115875 conditions, 14170 events. 7621/14170 cut-off events. For 245382/245382 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 112642 event pairs, 1231 based on Foata normal form. 31/14201 useless extension candidates. Maximal degree in co-relation 115802. Up to 7781 conditions per place. [2023-08-24 10:10:09,597 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 636 selfloop transitions, 430 changer transitions 130/1196 dead transitions. [2023-08-24 10:10:09,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1196 transitions, 23520 flow [2023-08-24 10:10:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-24 10:10:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-24 10:10:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 6548 transitions. [2023-08-24 10:10:09,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3345083014048531 [2023-08-24 10:10:09,603 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 6548 transitions. [2023-08-24 10:10:09,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 6548 transitions. [2023-08-24 10:10:09,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:10:09,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 6548 transitions. [2023-08-24 10:10:09,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 75.26436781609195) internal successors, (6548), 87 states have internal predecessors, (6548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:09,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 225.0) internal successors, (19800), 88 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:09,617 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 225.0) internal successors, (19800), 88 states have internal predecessors, (19800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:09,617 INFO L175 Difference]: Start difference. First operand has 295 places, 330 transitions, 6946 flow. Second operand 87 states and 6548 transitions. [2023-08-24 10:10:09,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1196 transitions, 23520 flow [2023-08-24 10:10:10,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1196 transitions, 22496 flow, removed 166 selfloop flow, removed 61 redundant places. [2023-08-24 10:10:10,273 INFO L231 Difference]: Finished difference. Result has 355 places, 672 transitions, 16327 flow [2023-08-24 10:10:10,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=16327, PETRI_PLACES=355, PETRI_TRANSITIONS=672} [2023-08-24 10:10:10,274 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 336 predicate places. [2023-08-24 10:10:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 672 transitions, 16327 flow [2023-08-24 10:10:10,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:10,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:10:10,274 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:10:10,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 10:10:10,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:10:10,477 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:10:10,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:10:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash 216745946, now seen corresponding path program 18 times [2023-08-24 10:10:10,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:10:10,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566794507] [2023-08-24 10:10:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:10:10,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:10:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:10:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:10:10,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:10:10,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566794507] [2023-08-24 10:10:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566794507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:10:10,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046463044] [2023-08-24 10:10:10,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:10:10,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:10:10,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:10:10,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:10:10,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 10:10:10,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 10:10:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:10:10,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 10:10:10,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:10:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-24 10:10:10,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:10:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:10:10,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046463044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:10:10,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:10:10,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10] total 16 [2023-08-24 10:10:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806153698] [2023-08-24 10:10:10,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:10:10,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:10:10,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:10:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:10:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:10:10,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 225 [2023-08-24 10:10:10,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 672 transitions, 16327 flow. Second operand has 17 states, 17 states have (on average 101.88235294117646) internal successors, (1732), 17 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:10,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:10:10,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 225 [2023-08-24 10:10:10,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:10:16,172 INFO L124 PetriNetUnfolderBase]: 10955/20268 cut-off events. [2023-08-24 10:10:16,173 INFO L125 PetriNetUnfolderBase]: For 453727/453727 co-relation queries the response was YES. [2023-08-24 10:10:16,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174637 conditions, 20268 events. 10955/20268 cut-off events. For 453727/453727 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 171175 event pairs, 2140 based on Foata normal form. 42/20310 useless extension candidates. Maximal degree in co-relation 174529. Up to 11163 conditions per place. [2023-08-24 10:10:16,338 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 389 selfloop transitions, 507 changer transitions 53/949 dead transitions. [2023-08-24 10:10:16,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 949 transitions, 25426 flow [2023-08-24 10:10:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 10:10:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 10:10:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 763 transitions. [2023-08-24 10:10:16,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2023-08-24 10:10:16,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 763 transitions. [2023-08-24 10:10:16,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 763 transitions. [2023-08-24 10:10:16,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:10:16,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 763 transitions. [2023-08-24 10:10:16,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:16,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:16,343 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 225.0) internal successors, (1800), 8 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:16,343 INFO L175 Difference]: Start difference. First operand has 355 places, 672 transitions, 16327 flow. Second operand 7 states and 763 transitions. [2023-08-24 10:10:16,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 949 transitions, 25426 flow [2023-08-24 10:10:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 949 transitions, 20237 flow, removed 2528 selfloop flow, removed 19 redundant places. [2023-08-24 10:10:18,667 INFO L231 Difference]: Finished difference. Result has 347 places, 855 transitions, 18986 flow [2023-08-24 10:10:18,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=12398, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18986, PETRI_PLACES=347, PETRI_TRANSITIONS=855} [2023-08-24 10:10:18,668 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 328 predicate places. [2023-08-24 10:10:18,668 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 855 transitions, 18986 flow [2023-08-24 10:10:18,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 101.88235294117646) internal successors, (1732), 17 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:18,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:10:18,668 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:10:18,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 10:10:18,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:10:18,872 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:10:18,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:10:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash -786644676, now seen corresponding path program 19 times [2023-08-24 10:10:18,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:10:18,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753328011] [2023-08-24 10:10:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:10:18,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:10:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:10:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:10:19,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:10:19,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753328011] [2023-08-24 10:10:19,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753328011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:10:19,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444294665] [2023-08-24 10:10:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:10:19,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:10:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:10:19,616 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:10:19,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 10:10:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:10:19,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-24 10:10:19,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:10:19,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:10:19,925 INFO L351 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 19 treesize of output 21 [2023-08-24 10:10:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:10:20,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:10:20,040 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_768) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-08-24 10:10:20,048 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:10:20,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-24 10:10:20,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-24 10:10:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 10:10:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444294665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:10:20,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:10:20,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 11] total 34 [2023-08-24 10:10:20,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745298844] [2023-08-24 10:10:20,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:10:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 10:10:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:10:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 10:10:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1098, Unknown=1, NotChecked=66, Total=1260 [2023-08-24 10:10:20,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 225 [2023-08-24 10:10:20,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 855 transitions, 18986 flow. Second operand has 36 states, 36 states have (on average 68.38888888888889) internal successors, (2462), 36 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:20,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:10:20,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 225 [2023-08-24 10:10:20,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:10:28,229 INFO L124 PetriNetUnfolderBase]: 13914/25519 cut-off events. [2023-08-24 10:10:28,229 INFO L125 PetriNetUnfolderBase]: For 448016/448016 co-relation queries the response was YES. [2023-08-24 10:10:28,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196571 conditions, 25519 events. 13914/25519 cut-off events. For 448016/448016 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 221709 event pairs, 1737 based on Foata normal form. 6/25525 useless extension candidates. Maximal degree in co-relation 196464. Up to 14047 conditions per place. [2023-08-24 10:10:28,443 INFO L140 encePairwiseOnDemand]: 219/225 looper letters, 384 selfloop transitions, 899 changer transitions 63/1346 dead transitions. [2023-08-24 10:10:28,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1346 transitions, 30339 flow [2023-08-24 10:10:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 10:10:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 10:10:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1926 transitions. [2023-08-24 10:10:28,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292307692307692 [2023-08-24 10:10:28,445 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1926 transitions. [2023-08-24 10:10:28,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1926 transitions. [2023-08-24 10:10:28,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:10:28,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1926 transitions. [2023-08-24 10:10:28,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 74.07692307692308) internal successors, (1926), 26 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:28,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 225.0) internal successors, (6075), 27 states have internal predecessors, (6075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:28,450 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 225.0) internal successors, (6075), 27 states have internal predecessors, (6075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:28,450 INFO L175 Difference]: Start difference. First operand has 347 places, 855 transitions, 18986 flow. Second operand 26 states and 1926 transitions. [2023-08-24 10:10:28,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1346 transitions, 30339 flow [2023-08-24 10:10:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1346 transitions, 29541 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-08-24 10:10:30,940 INFO L231 Difference]: Finished difference. Result has 326 places, 1106 transitions, 26593 flow [2023-08-24 10:10:30,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=18590, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=648, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26593, PETRI_PLACES=326, PETRI_TRANSITIONS=1106} [2023-08-24 10:10:30,941 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 307 predicate places. [2023-08-24 10:10:30,941 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1106 transitions, 26593 flow [2023-08-24 10:10:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 68.38888888888889) internal successors, (2462), 36 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:30,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:10:30,941 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:10:30,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 10:10:31,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:10:31,144 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:10:31,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:10:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1060364696, now seen corresponding path program 20 times [2023-08-24 10:10:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:10:31,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190089488] [2023-08-24 10:10:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:10:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:10:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:10:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:10:31,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:10:31,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190089488] [2023-08-24 10:10:31,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190089488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:10:31,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850304628] [2023-08-24 10:10:31,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:10:31,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:10:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:10:31,624 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:10:31,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 10:10:31,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:10:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:10:31,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:10:31,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:10:32,308 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:10:32,308 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-08-24 10:10:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:10:32,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:10:32,455 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:10:32,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:10:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:10:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850304628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:10:33,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:10:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-24 10:10:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631045570] [2023-08-24 10:10:33,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:10:33,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-24 10:10:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:10:33,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-24 10:10:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2023-08-24 10:10:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:10:33,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1106 transitions, 26593 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:10:33,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:10:33,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:10:33,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:11:19,122 INFO L124 PetriNetUnfolderBase]: 33438/61144 cut-off events. [2023-08-24 10:11:19,123 INFO L125 PetriNetUnfolderBase]: For 1552714/1552714 co-relation queries the response was YES. [2023-08-24 10:11:19,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483175 conditions, 61144 events. 33438/61144 cut-off events. For 1552714/1552714 co-relation queries the response was YES. Maximal size of possible extension queue 2353. Compared 591160 event pairs, 2455 based on Foata normal form. 161/61305 useless extension candidates. Maximal degree in co-relation 483070. Up to 33638 conditions per place. [2023-08-24 10:11:19,966 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 2112 selfloop transitions, 2348 changer transitions 412/4872 dead transitions. [2023-08-24 10:11:19,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 4872 transitions, 105381 flow [2023-08-24 10:11:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2023-08-24 10:11:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2023-08-24 10:11:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 25897 transitions. [2023-08-24 10:11:19,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35414700854700853 [2023-08-24 10:11:19,983 INFO L72 ComplementDD]: Start complementDD. Operand 325 states and 25897 transitions. [2023-08-24 10:11:19,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 325 states and 25897 transitions. [2023-08-24 10:11:19,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:11:19,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 325 states and 25897 transitions. [2023-08-24 10:11:20,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 326 states, 325 states have (on average 79.68307692307692) internal successors, (25897), 325 states have internal predecessors, (25897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:20,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 326 states, 326 states have (on average 225.0) internal successors, (73350), 326 states have internal predecessors, (73350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:20,055 INFO L81 ComplementDD]: Finished complementDD. Result has 326 states, 326 states have (on average 225.0) internal successors, (73350), 326 states have internal predecessors, (73350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:20,055 INFO L175 Difference]: Start difference. First operand has 326 places, 1106 transitions, 26593 flow. Second operand 325 states and 25897 transitions. [2023-08-24 10:11:20,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 4872 transitions, 105381 flow [2023-08-24 10:11:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 4872 transitions, 101592 flow, removed 1732 selfloop flow, removed 7 redundant places. [2023-08-24 10:11:28,703 INFO L231 Difference]: Finished difference. Result has 777 places, 2792 transitions, 70180 flow [2023-08-24 10:11:28,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=26161, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=325, PETRI_FLOW=70180, PETRI_PLACES=777, PETRI_TRANSITIONS=2792} [2023-08-24 10:11:28,704 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 758 predicate places. [2023-08-24 10:11:28,704 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2792 transitions, 70180 flow [2023-08-24 10:11:28,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:28,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:11:28,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:11:28,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 10:11:28,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 10:11:28,908 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:11:28,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:11:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash 933059142, now seen corresponding path program 21 times [2023-08-24 10:11:28,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:11:28,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817301006] [2023-08-24 10:11:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:11:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:11:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:11:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:11:29,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:11:29,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817301006] [2023-08-24 10:11:29,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817301006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:11:29,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290785166] [2023-08-24 10:11:29,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:11:29,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:11:29,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:11:29,441 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:11:29,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 10:11:29,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 10:11:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:11:29,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 10:11:29,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:11:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-24 10:11:29,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:11:29,803 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:11:29,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:11:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-24 10:11:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290785166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:11:29,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:11:29,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2023-08-24 10:11:29,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684321993] [2023-08-24 10:11:29,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:11:29,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 10:11:29,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:11:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 10:11:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2023-08-24 10:11:29,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:11:29,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2792 transitions, 70180 flow. Second operand has 27 states, 27 states have (on average 72.62962962962963) internal successors, (1961), 27 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:29,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:11:29,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:11:29,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:12:23,521 INFO L124 PetriNetUnfolderBase]: 39008/71949 cut-off events. [2023-08-24 10:12:23,521 INFO L125 PetriNetUnfolderBase]: For 10770559/10770559 co-relation queries the response was YES. [2023-08-24 10:12:26,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628172 conditions, 71949 events. 39008/71949 cut-off events. For 10770559/10770559 co-relation queries the response was YES. Maximal size of possible extension queue 2678. Compared 714774 event pairs, 6076 based on Foata normal form. 931/72880 useless extension candidates. Maximal degree in co-relation 627934. Up to 39251 conditions per place. [2023-08-24 10:12:26,224 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 1953 selfloop transitions, 2221 changer transitions 265/4439 dead transitions. [2023-08-24 10:12:26,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 4439 transitions, 122038 flow [2023-08-24 10:12:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-08-24 10:12:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2023-08-24 10:12:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 11489 transitions. [2023-08-24 10:12:26,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3545987654320988 [2023-08-24 10:12:26,238 INFO L72 ComplementDD]: Start complementDD. Operand 144 states and 11489 transitions. [2023-08-24 10:12:26,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 11489 transitions. [2023-08-24 10:12:26,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:12:26,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 144 states and 11489 transitions. [2023-08-24 10:12:26,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 145 states, 144 states have (on average 79.78472222222223) internal successors, (11489), 144 states have internal predecessors, (11489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:12:26,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 145 states, 145 states have (on average 225.0) internal successors, (32625), 145 states have internal predecessors, (32625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:12:26,266 INFO L81 ComplementDD]: Finished complementDD. Result has 145 states, 145 states have (on average 225.0) internal successors, (32625), 145 states have internal predecessors, (32625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:12:26,266 INFO L175 Difference]: Start difference. First operand has 777 places, 2792 transitions, 70180 flow. Second operand 144 states and 11489 transitions. [2023-08-24 10:12:26,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 4439 transitions, 122038 flow [2023-08-24 10:13:56,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 4439 transitions, 106876 flow, removed 7572 selfloop flow, removed 7 redundant places. [2023-08-24 10:13:56,319 INFO L231 Difference]: Finished difference. Result has 955 places, 3287 transitions, 76589 flow [2023-08-24 10:13:56,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=48756, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=144, PETRI_FLOW=76589, PETRI_PLACES=955, PETRI_TRANSITIONS=3287} [2023-08-24 10:13:56,321 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 936 predicate places. [2023-08-24 10:13:56,321 INFO L495 AbstractCegarLoop]: Abstraction has has 955 places, 3287 transitions, 76589 flow [2023-08-24 10:13:56,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 72.62962962962963) internal successors, (1961), 27 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:13:56,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:13:56,322 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:13:56,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 10:13:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 10:13:56,526 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:13:56,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:13:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1534775318, now seen corresponding path program 22 times [2023-08-24 10:13:56,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:13:56,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789433359] [2023-08-24 10:13:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:13:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:13:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:13:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:13:57,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:13:57,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789433359] [2023-08-24 10:13:57,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789433359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:13:57,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398683106] [2023-08-24 10:13:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:13:57,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:13:57,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:13:57,048 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:13:57,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 10:13:57,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:13:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:13:57,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 10:13:57,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:13:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:13:57,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:13:57,713 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-24 10:13:57,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-24 10:13:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:13:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398683106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:13:58,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:13:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-24 10:13:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409362226] [2023-08-24 10:13:58,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:13:58,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-24 10:13:58,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:13:58,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-24 10:13:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2023-08-24 10:13:58,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 225 [2023-08-24 10:13:58,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 955 places, 3287 transitions, 76589 flow. Second operand has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:13:58,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:13:58,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 225 [2023-08-24 10:13:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:15:19,727 INFO L124 PetriNetUnfolderBase]: 45913/85170 cut-off events. [2023-08-24 10:15:19,727 INFO L125 PetriNetUnfolderBase]: For 16010236/16010236 co-relation queries the response was YES. [2023-08-24 10:15:24,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733998 conditions, 85170 events. 45913/85170 cut-off events. For 16010236/16010236 co-relation queries the response was YES. Maximal size of possible extension queue 2525. Compared 857418 event pairs, 7474 based on Foata normal form. 1186/86356 useless extension candidates. Maximal degree in co-relation 733677. Up to 46347 conditions per place. [2023-08-24 10:15:24,279 INFO L140 encePairwiseOnDemand]: 218/225 looper letters, 2022 selfloop transitions, 2426 changer transitions 801/5249 dead transitions. [2023-08-24 10:15:24,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 5249 transitions, 132866 flow [2023-08-24 10:15:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-08-24 10:15:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2023-08-24 10:15:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 12754 transitions. [2023-08-24 10:15:24,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35207729468599036 [2023-08-24 10:15:24,286 INFO L72 ComplementDD]: Start complementDD. Operand 161 states and 12754 transitions. [2023-08-24 10:15:24,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 161 states and 12754 transitions. [2023-08-24 10:15:24,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:15:24,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 161 states and 12754 transitions. [2023-08-24 10:15:24,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 162 states, 161 states have (on average 79.21739130434783) internal successors, (12754), 161 states have internal predecessors, (12754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:15:24,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 162 states, 162 states have (on average 225.0) internal successors, (36450), 162 states have internal predecessors, (36450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:15:24,315 INFO L81 ComplementDD]: Finished complementDD. Result has 162 states, 162 states have (on average 225.0) internal successors, (36450), 162 states have internal predecessors, (36450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:15:24,315 INFO L175 Difference]: Start difference. First operand has 955 places, 3287 transitions, 76589 flow. Second operand 161 states and 12754 transitions. [2023-08-24 10:15:24,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 5249 transitions, 132866 flow [2023-08-24 10:17:21,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 5249 transitions, 120257 flow, removed 4157 selfloop flow, removed 103 redundant places. [2023-08-24 10:17:21,843 INFO L231 Difference]: Finished difference. Result has 923 places, 3610 transitions, 90041 flow [2023-08-24 10:17:21,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=64052, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=977, PETRI_DIFFERENCE_SUBTRAHEND_STATES=161, PETRI_FLOW=90041, PETRI_PLACES=923, PETRI_TRANSITIONS=3610} [2023-08-24 10:17:21,845 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 904 predicate places. [2023-08-24 10:17:21,845 INFO L495 AbstractCegarLoop]: Abstraction has has 923 places, 3610 transitions, 90041 flow [2023-08-24 10:17:21,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 72.47058823529412) internal successors, (3696), 51 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:17:21,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:17:21,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:17:21,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 10:17:22,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:17:22,046 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:17:22,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:17:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash -290143634, now seen corresponding path program 23 times [2023-08-24 10:17:22,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:17:22,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271380613] [2023-08-24 10:17:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:17:22,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:17:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:17:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:17:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:17:22,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271380613] [2023-08-24 10:17:22,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271380613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:17:22,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139036473] [2023-08-24 10:17:22,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:17:22,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:17:22,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:17:22,653 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:17:22,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 10:17:22,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 10:17:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:17:22,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 10:17:22,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:17:22,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 10:17:22,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:17:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:17:23,193 INFO L351 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 19 treesize of output 21 [2023-08-24 10:17:23,404 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-24 10:17:23,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2023-08-24 10:17:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:17:23,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:17:23,559 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_956 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_956) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-08-24 10:17:23,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:17:23,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2023-08-24 10:17:23,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:17:23,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 97 [2023-08-24 10:17:23,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2023-08-24 10:17:23,972 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:17:23,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2023-08-24 10:17:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-24 10:17:24,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139036473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:17:24,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:17:24,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-24 10:17:24,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489469314] [2023-08-24 10:17:24,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:17:24,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-24 10:17:24,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:17:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-24 10:17:24,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2458, Unknown=3, NotChecked=102, Total=2862 [2023-08-24 10:17:24,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 225 [2023-08-24 10:17:24,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 3610 transitions, 90041 flow. Second operand has 54 states, 54 states have (on average 65.38888888888889) internal successors, (3531), 54 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:17:24,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:17:24,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 225 [2023-08-24 10:17:24,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:17:26,059 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_~back~0_199 Int)) (or (<= c_~n~0 v_~back~0_199) (not (= 5 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* v_~back~0_199 4))))) (< v_~back~0_199 (+ c_~back~0 3)) (< v_~back~0_199 0))) (forall ((v_ArrVal_956 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_956) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16))))) (or (< (+ 5 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0) (let ((.cse0 (< c_~n~0 (+ c_~back~0 5)))) (and (or (< c_~front~0 (+ c_~back~0 1)) .cse0) (or .cse0 (< c_~n~0 (+ 6 c_~front~0))) (or .cse0 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))))) is different from false [2023-08-24 10:19:51,363 INFO L124 PetriNetUnfolderBase]: 74500/137308 cut-off events. [2023-08-24 10:19:51,363 INFO L125 PetriNetUnfolderBase]: For 12895298/12895298 co-relation queries the response was YES. [2023-08-24 10:19:57,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148316 conditions, 137308 events. 74500/137308 cut-off events. For 12895298/12895298 co-relation queries the response was YES. Maximal size of possible extension queue 4417. Compared 1465601 event pairs, 28361 based on Foata normal form. 1/137309 useless extension candidates. Maximal degree in co-relation 1148039. Up to 75263 conditions per place. [2023-08-24 10:19:57,641 INFO L140 encePairwiseOnDemand]: 215/225 looper letters, 5758 selfloop transitions, 860 changer transitions 148/6766 dead transitions. [2023-08-24 10:19:57,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 6766 transitions, 165510 flow [2023-08-24 10:19:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-24 10:19:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-24 10:19:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4189 transitions. [2023-08-24 10:19:57,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31555555555555553 [2023-08-24 10:19:57,644 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4189 transitions. [2023-08-24 10:19:57,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4189 transitions. [2023-08-24 10:19:57,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:19:57,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4189 transitions. [2023-08-24 10:19:57,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 71.0) internal successors, (4189), 59 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:19:57,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 225.0) internal successors, (13500), 60 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:19:57,816 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 225.0) internal successors, (13500), 60 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:19:57,816 INFO L175 Difference]: Start difference. First operand has 923 places, 3610 transitions, 90041 flow. Second operand 59 states and 4189 transitions. [2023-08-24 10:19:57,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 6766 transitions, 165510 flow Received shutdown request... [2023-08-24 10:21:51,457 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 10:21:51,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 10:21:51,470 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:21:51,470 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:21:51,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:21:51,658 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 10:21:51,659 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 10:21:51,659 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 10:21:51,659 INFO L445 BasicCegarLoop]: Path program histogram: [23, 1, 1, 1] [2023-08-24 10:21:51,661 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 10:21:51,661 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 10:21:51,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 10:21:51 BasicIcfg [2023-08-24 10:21:51,663 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 10:21:51,663 INFO L158 Benchmark]: Toolchain (without parser) took 768476.51ms. Allocated memory was 396.4MB in the beginning and 11.2GB in the end (delta: 10.8GB). Free memory was 354.0MB in the beginning and 3.1GB in the end (delta: -2.7GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. [2023-08-24 10:21:51,663 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 396.4MB. Free memory was 373.2MB in the beginning and 373.1MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:21:51,663 INFO L158 Benchmark]: CACSL2BoogieTranslator took 140.05ms. Allocated memory is still 396.4MB. Free memory was 354.0MB in the beginning and 342.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 10:21:51,664 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.61ms. Allocated memory is still 396.4MB. Free memory was 342.5MB in the beginning and 340.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:21:51,664 INFO L158 Benchmark]: Boogie Preprocessor took 15.46ms. Allocated memory is still 396.4MB. Free memory was 340.4MB in the beginning and 339.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:21:51,664 INFO L158 Benchmark]: RCFGBuilder took 428.94ms. Allocated memory is still 396.4MB. Free memory was 339.3MB in the beginning and 316.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-24 10:21:51,664 INFO L158 Benchmark]: TraceAbstraction took 767862.62ms. Allocated memory was 396.4MB in the beginning and 11.2GB in the end (delta: 10.8GB). Free memory was 316.3MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. [2023-08-24 10:21:51,665 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 396.4MB. Free memory was 373.2MB in the beginning and 373.1MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 140.05ms. Allocated memory is still 396.4MB. Free memory was 354.0MB in the beginning and 342.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.61ms. Allocated memory is still 396.4MB. Free memory was 342.5MB in the beginning and 340.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.46ms. Allocated memory is still 396.4MB. Free memory was 340.4MB in the beginning and 339.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 428.94ms. Allocated memory is still 396.4MB. Free memory was 339.3MB in the beginning and 316.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 767862.62ms. Allocated memory was 396.4MB in the beginning and 11.2GB in the end (delta: 10.8GB). Free memory was 316.3MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 104 PlacesBefore, 19 PlacesAfterwards, 106 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 109 TotalNumberOfCompositions, 467 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 462, independent: 457, independent conditional: 0, independent unconditional: 457, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 261, independent: 260, independent conditional: 0, independent unconditional: 260, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 462, independent: 197, independent conditional: 0, independent unconditional: 197, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 261, unknown conditional: 0, unknown unconditional: 261] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 126 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 767.8s, OverallIterations: 26, TraceHistogramMax: 5, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 737.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 279 mSolverCounterUnknown, 11461 SdHoareTripleChecker+Valid, 33.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11461 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 29.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1974 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 889 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53905 IncrementalHoareTripleChecker+Invalid, 57047 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 889 mSolverCounterUnsat, 0 mSDtfsCounter, 53905 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2360 GetRequests, 629 SyntacticMatches, 4 SemanticMatches, 1727 ConstructedPredicates, 11 IntricatePredicates, 6 DeprecatedPredicates, 81530 ImplicationChecksByTransitivity, 60.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90041occurred in iteration=25, InterpolantAutomatonStates: 1266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 19.5s InterpolantComputationTime, 1033 NumberOfCodeBlocks, 1033 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1458 ConstructedInterpolants, 72 QuantifiedInterpolants, 16111 SizeOfPredicates, 239 NumberOfNonLiveVariables, 5422 ConjunctsInSsa, 693 ConjunctsInUnsatCore, 72 InterpolantComputations, 3 PerfectInterpolantSequences, 380/1572 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown