/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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:34:04,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:34:04,756 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 [2023-08-27 07:34:04,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:34:04,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:34:04,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:34:04,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:34:04,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:34:04,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:34:04,798 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:34:04,799 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:34:04,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:34:04,799 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:34:04,800 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:34:04,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:34:04,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:34:04,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:34:04,801 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:34:04,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:34:04,802 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:34:04,802 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:34:04,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:34:04,803 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:34:04,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:34:04,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:34:04,804 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:34:04,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:34:04,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:34:04,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:34:04,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:34:04,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:34:04,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:34:04,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:34:04,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:34:04,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:34:04,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:34:05,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:34:05,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:34:05,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:34:05,151 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:34:05,151 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:34:05,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-27 07:34:06,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:34:06,609 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:34:06,610 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-27 07:34:06,621 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9323f96cd/a393bdc8d7954c89bf82a41650b46941/FLAGbf9490b8d [2023-08-27 07:34:06,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9323f96cd/a393bdc8d7954c89bf82a41650b46941 [2023-08-27 07:34:06,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:34:06,643 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:34:06,646 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:34:06,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:34:06,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:34:06,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c197c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06, skipping insertion in model container [2023-08-27 07:34:06,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,670 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:34:06,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:34:06,849 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:34:06,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:34:06,886 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:34:06,886 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:34:06,892 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:34:06,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06 WrapperNode [2023-08-27 07:34:06,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:34:06,894 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:34:06,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:34:06,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:34:06,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,930 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2023-08-27 07:34:06,930 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:34:06,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:34:06,931 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:34:06,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:34:06,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,950 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,962 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,964 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:34:06,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:34:06,965 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:34:06,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:34:06,966 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (1/1) ... [2023-08-27 07:34:06,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:34:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:06,997 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) [2023-08-27 07:34:07,016 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 [2023-08-27 07:34:07,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:34:07,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:34:07,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:34:07,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:34:07,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:34:07,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:34:07,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:34:07,038 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 07:34:07,139 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:34:07,141 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:34:07,375 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:34:07,411 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:34:07,411 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 07:34:07,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:07 BoogieIcfgContainer [2023-08-27 07:34:07,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:34:07,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:34:07,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:34:07,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:34:07,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:34:06" (1/3) ... [2023-08-27 07:34:07,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f20209c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:34:07, skipping insertion in model container [2023-08-27 07:34:07,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:34:06" (2/3) ... [2023-08-27 07:34:07,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f20209c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:34:07, skipping insertion in model container [2023-08-27 07:34:07,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:34:07" (3/3) ... [2023-08-27 07:34:07,422 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-08-27 07:34:07,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:34:07,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 07:34:07,439 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:34:07,521 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 07:34:07,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 186 flow [2023-08-27 07:34:07,624 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-08-27 07:34:07,624 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:34:07,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 6/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-27 07:34:07,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 186 flow [2023-08-27 07:34:07,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-08-27 07:34:07,641 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:34:07,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-27 07:34:07,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-08-27 07:34:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-08-27 07:34:07,690 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-27 07:34:07,690 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:34:07,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-27 07:34:07,693 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-27 07:34:09,714 INFO L134 LiptonReduction]: Checked pairs total: 595 [2023-08-27 07:34:09,714 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-27 07:34:09,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:34:09,748 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;@7bb7870c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:34:09,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-27 07:34:09,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:34:09,754 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-27 07:34:09,754 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:34:09,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:09,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:09,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:09,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -921782479, now seen corresponding path program 1 times [2023-08-27 07:34:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:09,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983407924] [2023-08-27 07:34:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:10,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983407924] [2023-08-27 07:34:10,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983407924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:34:10,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:34:10,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:34:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582751476] [2023-08-27 07:34:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:34:10,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:34:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:34:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:34:10,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 151 [2023-08-27 07:34:10,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:10,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 151 [2023-08-27 07:34:10,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:10,354 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-08-27 07:34:10,354 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-27 07:34:10,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-27 07:34:10,356 INFO L140 encePairwiseOnDemand]: 147/151 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-27 07:34:10,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-27 07:34:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:34:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:34:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-27 07:34:10,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5298013245033113 [2023-08-27 07:34:10,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-27 07:34:10,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-27 07:34:10,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:10,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-27 07:34:10,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,378 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,380 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 240 transitions. [2023-08-27 07:34:10,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-27 07:34:10,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 07:34:10,383 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-27 07:34:10,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, 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=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-27 07:34:10,388 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-27 07:34:10,388 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-27 07:34:10,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:10,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:10,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:34:10,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:10,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:10,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1883932459, now seen corresponding path program 1 times [2023-08-27 07:34:10,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:10,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229891604] [2023-08-27 07:34:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:10,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229891604] [2023-08-27 07:34:10,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229891604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:34:10,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:34:10,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 07:34:10,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268228118] [2023-08-27 07:34:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:34:10,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:34:10,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:34:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:34:10,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:10,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 63.8) internal successors, (319), 5 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:10,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:10,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:10,634 INFO L124 PetriNetUnfolderBase]: 73/145 cut-off events. [2023-08-27 07:34:10,634 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-27 07:34:10,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 145 events. 73/145 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 439 event pairs, 24 based on Foata normal form. 6/151 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-08-27 07:34:10,636 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 28 selfloop transitions, 3 changer transitions 3/34 dead transitions. [2023-08-27 07:34:10,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 34 transitions, 164 flow [2023-08-27 07:34:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:34:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:34:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 339 transitions. [2023-08-27 07:34:10,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44900662251655626 [2023-08-27 07:34:10,643 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 339 transitions. [2023-08-27 07:34:10,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 339 transitions. [2023-08-27 07:34:10,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:10,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 339 transitions. [2023-08-27 07:34:10,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.8) internal successors, (339), 5 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,651 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,651 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 339 transitions. [2023-08-27 07:34:10,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 34 transitions, 164 flow [2023-08-27 07:34:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 34 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:34:10,653 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 76 flow [2023-08-27 07:34:10,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-27 07:34:10,654 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-27 07:34:10,655 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 76 flow [2023-08-27 07:34:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.8) internal successors, (319), 5 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:10,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:10,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:10,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 07:34:10,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:10,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash 369567433, now seen corresponding path program 2 times [2023-08-27 07:34:10,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:10,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156627501] [2023-08-27 07:34:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:10,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:10,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:10,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156627501] [2023-08-27 07:34:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156627501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698878018] [2023-08-27 07:34:10,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:34:10,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:10,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:10,817 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) [2023-08-27 07:34:10,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 07:34:10,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:10,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:34:10,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:11,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698878018] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:11,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:34:11,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-27 07:34:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590446155] [2023-08-27 07:34:11,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:34:11,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:34:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:34:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:34:11,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-08-27 07:34:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-08-27 07:34:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:11,165 INFO L124 PetriNetUnfolderBase]: 72/143 cut-off events. [2023-08-27 07:34:11,165 INFO L125 PetriNetUnfolderBase]: For 148/152 co-relation queries the response was YES. [2023-08-27 07:34:11,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 143 events. 72/143 cut-off events. For 148/152 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 428 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 118. Up to 86 conditions per place. [2023-08-27 07:34:11,169 INFO L140 encePairwiseOnDemand]: 147/151 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-08-27 07:34:11,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 194 flow [2023-08-27 07:34:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:34:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:34:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-27 07:34:11,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817880794701987 [2023-08-27 07:34:11,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-27 07:34:11,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-27 07:34:11,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:11,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-27 07:34:11,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,174 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,174 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 76 flow. Second operand 4 states and 291 transitions. [2023-08-27 07:34:11,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 194 flow [2023-08-27 07:34:11,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-27 07:34:11,176 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-08-27 07:34:11,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-27 07:34:11,178 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-27 07:34:11,178 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-08-27 07:34:11,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:11,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:11,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:11,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:11,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:11,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:11,391 INFO L85 PathProgramCache]: Analyzing trace with hash -392524209, now seen corresponding path program 3 times [2023-08-27 07:34:11,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:11,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195409376] [2023-08-27 07:34:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:11,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:11,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:11,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195409376] [2023-08-27 07:34:11,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195409376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:11,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258405579] [2023-08-27 07:34:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:34:11,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:11,510 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) [2023-08-27 07:34:11,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 07:34:11,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:34:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:11,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:34:11,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:11,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:11,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258405579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:11,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-27 07:34:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169388567] [2023-08-27 07:34:11,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:34:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:34:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:34:11,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:11,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 64.14285714285714) internal successors, (449), 7 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:11,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:11,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:11,859 INFO L124 PetriNetUnfolderBase]: 105/203 cut-off events. [2023-08-27 07:34:11,859 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-27 07:34:11,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 203 events. 105/203 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 678 event pairs, 35 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 144 conditions per place. [2023-08-27 07:34:11,863 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 33 selfloop transitions, 14 changer transitions 5/52 dead transitions. [2023-08-27 07:34:11,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 52 transitions, 330 flow [2023-08-27 07:34:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:34:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:34:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 537 transitions. [2023-08-27 07:34:11,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4445364238410596 [2023-08-27 07:34:11,866 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 537 transitions. [2023-08-27 07:34:11,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 537 transitions. [2023-08-27 07:34:11,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:11,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 537 transitions. [2023-08-27 07:34:11,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 67.125) internal successors, (537), 8 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 151.0) internal successors, (1359), 9 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,870 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 151.0) internal successors, (1359), 9 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,870 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 8 states and 537 transitions. [2023-08-27 07:34:11,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 52 transitions, 330 flow [2023-08-27 07:34:11,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:34:11,877 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 215 flow [2023-08-27 07:34:11,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-27 07:34:11,881 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-27 07:34:11,882 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 215 flow [2023-08-27 07:34:11,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.14285714285714) internal successors, (449), 7 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:11,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:11,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:11,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:12,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-27 07:34:12,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:12,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1810712877, now seen corresponding path program 4 times [2023-08-27 07:34:12,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:12,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079132062] [2023-08-27 07:34:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:12,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:12,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:12,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079132062] [2023-08-27 07:34:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079132062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:12,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239955718] [2023-08-27 07:34:12,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:34:12,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:12,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:12,177 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) [2023-08-27 07:34:12,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 07:34:12,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:34:12,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:12,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:34:12,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:12,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:12,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239955718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:12,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:12,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-27 07:34:12,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550494049] [2023-08-27 07:34:12,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:12,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 07:34:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 07:34:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:34:12,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:12,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 215 flow. Second operand has 8 states, 8 states have (on average 63.625) internal successors, (509), 8 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:12,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:12,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:12,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:12,383 INFO L124 PetriNetUnfolderBase]: 78/147 cut-off events. [2023-08-27 07:34:12,383 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2023-08-27 07:34:12,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 147 events. 78/147 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 22 based on Foata normal form. 6/153 useless extension candidates. Maximal degree in co-relation 515. Up to 94 conditions per place. [2023-08-27 07:34:12,385 INFO L140 encePairwiseOnDemand]: 146/151 looper letters, 26 selfloop transitions, 13 changer transitions 1/40 dead transitions. [2023-08-27 07:34:12,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 340 flow [2023-08-27 07:34:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:34:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:34:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 337 transitions. [2023-08-27 07:34:12,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463576158940397 [2023-08-27 07:34:12,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 337 transitions. [2023-08-27 07:34:12,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 337 transitions. [2023-08-27 07:34:12,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:12,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 337 transitions. [2023-08-27 07:34:12,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:12,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:12,389 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:12,390 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 215 flow. Second operand 5 states and 337 transitions. [2023-08-27 07:34:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 340 flow [2023-08-27 07:34:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 310 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-27 07:34:12,393 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 214 flow [2023-08-27 07:34:12,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-27 07:34:12,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2023-08-27 07:34:12,394 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 214 flow [2023-08-27 07:34:12,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.625) internal successors, (509), 8 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:12,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:12,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:12,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:12,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:12,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:12,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1814170769, now seen corresponding path program 1 times [2023-08-27 07:34:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:12,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561860581] [2023-08-27 07:34:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:12,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:12,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:12,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561860581] [2023-08-27 07:34:12,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561860581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:12,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655840698] [2023-08-27 07:34:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:12,730 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) [2023-08-27 07:34:12,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 07:34:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:12,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:34:12,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:12,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655840698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:12,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:12,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-08-27 07:34:12,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262887215] [2023-08-27 07:34:12,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:34:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:34:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:34:12,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 151 [2023-08-27 07:34:12,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:12,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:12,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 151 [2023-08-27 07:34:12,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:12,995 INFO L124 PetriNetUnfolderBase]: 128/244 cut-off events. [2023-08-27 07:34:12,995 INFO L125 PetriNetUnfolderBase]: For 800/817 co-relation queries the response was YES. [2023-08-27 07:34:12,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 244 events. 128/244 cut-off events. For 800/817 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 871 event pairs, 12 based on Foata normal form. 23/264 useless extension candidates. Maximal degree in co-relation 840. Up to 120 conditions per place. [2023-08-27 07:34:12,997 INFO L140 encePairwiseOnDemand]: 147/151 looper letters, 34 selfloop transitions, 11 changer transitions 6/56 dead transitions. [2023-08-27 07:34:12,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 453 flow [2023-08-27 07:34:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:34:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:34:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-08-27 07:34:12,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149006622516556 [2023-08-27 07:34:12,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-08-27 07:34:12,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-08-27 07:34:12,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:12,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-08-27 07:34:13,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,002 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,002 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 214 flow. Second operand 4 states and 311 transitions. [2023-08-27 07:34:13,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 453 flow [2023-08-27 07:34:13,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 423 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 07:34:13,006 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 305 flow [2023-08-27 07:34:13,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-27 07:34:13,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-08-27 07:34:13,009 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 305 flow [2023-08-27 07:34:13,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.5) internal successors, (441), 6 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:13,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:13,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:13,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:13,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:13,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash -397637709, now seen corresponding path program 2 times [2023-08-27 07:34:13,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:13,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028580183] [2023-08-27 07:34:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:13,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028580183] [2023-08-27 07:34:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028580183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308200101] [2023-08-27 07:34:13,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:34:13,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:13,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:13,340 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) [2023-08-27 07:34:13,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 07:34:13,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:13,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:13,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:34:13,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:13,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308200101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:13,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:13,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-27 07:34:13,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000496157] [2023-08-27 07:34:13,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:13,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 07:34:13,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:13,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 07:34:13,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-27 07:34:13,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:13,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 305 flow. Second operand has 12 states, 12 states have (on average 63.333333333333336) internal successors, (760), 12 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:13,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:13,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:13,846 INFO L124 PetriNetUnfolderBase]: 226/403 cut-off events. [2023-08-27 07:34:13,846 INFO L125 PetriNetUnfolderBase]: For 1158/1158 co-relation queries the response was YES. [2023-08-27 07:34:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 403 events. 226/403 cut-off events. For 1158/1158 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1574 event pairs, 12 based on Foata normal form. 8/411 useless extension candidates. Maximal degree in co-relation 1571. Up to 153 conditions per place. [2023-08-27 07:34:13,849 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 64 selfloop transitions, 34 changer transitions 11/109 dead transitions. [2023-08-27 07:34:13,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 109 transitions, 992 flow [2023-08-27 07:34:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 07:34:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 07:34:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 871 transitions. [2023-08-27 07:34:13,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44370860927152317 [2023-08-27 07:34:13,853 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 871 transitions. [2023-08-27 07:34:13,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 871 transitions. [2023-08-27 07:34:13,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:13,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 871 transitions. [2023-08-27 07:34:13,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.0) internal successors, (871), 13 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,859 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,859 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 305 flow. Second operand 13 states and 871 transitions. [2023-08-27 07:34:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 109 transitions, 992 flow [2023-08-27 07:34:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 109 transitions, 966 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-27 07:34:13,865 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 646 flow [2023-08-27 07:34:13,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=646, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-08-27 07:34:13,866 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-08-27 07:34:13,866 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 646 flow [2023-08-27 07:34:13,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.333333333333336) internal successors, (760), 12 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:13,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:13,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:13,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:14,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:14,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:14,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -222644943, now seen corresponding path program 3 times [2023-08-27 07:34:14,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:14,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53005375] [2023-08-27 07:34:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:14,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:14,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:14,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53005375] [2023-08-27 07:34:14,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53005375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:14,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689587701] [2023-08-27 07:34:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:34:14,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:14,198 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) [2023-08-27 07:34:14,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 07:34:14,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:34:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:14,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:34:14,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:14,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:14,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689587701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:14,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:14,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-27 07:34:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315003683] [2023-08-27 07:34:14,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:14,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 07:34:14,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 07:34:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:34:14,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:14,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 646 flow. Second operand has 14 states, 14 states have (on average 63.0) internal successors, (882), 14 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:14,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:14,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:14,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:14,872 INFO L124 PetriNetUnfolderBase]: 254/436 cut-off events. [2023-08-27 07:34:14,873 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2023-08-27 07:34:14,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 436 events. 254/436 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1611 event pairs, 19 based on Foata normal form. 22/458 useless extension candidates. Maximal degree in co-relation 2210. Up to 161 conditions per place. [2023-08-27 07:34:14,877 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 74 selfloop transitions, 59 changer transitions 1/134 dead transitions. [2023-08-27 07:34:14,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 134 transitions, 1497 flow [2023-08-27 07:34:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 07:34:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 07:34:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1324 transitions. [2023-08-27 07:34:14,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384105960264901 [2023-08-27 07:34:14,881 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1324 transitions. [2023-08-27 07:34:14,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1324 transitions. [2023-08-27 07:34:14,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:14,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1324 transitions. [2023-08-27 07:34:14,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.2) internal successors, (1324), 20 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:14,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:14,889 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:14,890 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 646 flow. Second operand 20 states and 1324 transitions. [2023-08-27 07:34:14,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 134 transitions, 1497 flow [2023-08-27 07:34:14,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 134 transitions, 1293 flow, removed 95 selfloop flow, removed 4 redundant places. [2023-08-27 07:34:14,900 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 1021 flow [2023-08-27 07:34:14,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1021, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2023-08-27 07:34:14,901 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-08-27 07:34:14,901 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 1021 flow [2023-08-27 07:34:14,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.0) internal successors, (882), 14 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:14,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:14,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:14,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:15,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:15,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:15,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash 135743371, now seen corresponding path program 4 times [2023-08-27 07:34:15,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:15,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202099223] [2023-08-27 07:34:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:15,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:15,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202099223] [2023-08-27 07:34:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202099223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578210637] [2023-08-27 07:34:15,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:34:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:15,294 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) [2023-08-27 07:34:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 07:34:15,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:34:15,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:15,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:34:15,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:15,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578210637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:15,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:15,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-27 07:34:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009434708] [2023-08-27 07:34:15,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 07:34:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 07:34:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:34:15,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:15,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 1021 flow. Second operand has 14 states, 14 states have (on average 62.92857142857143) internal successors, (881), 14 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:15,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:15,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:15,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:15,962 INFO L124 PetriNetUnfolderBase]: 317/533 cut-off events. [2023-08-27 07:34:15,963 INFO L125 PetriNetUnfolderBase]: For 5651/5651 co-relation queries the response was YES. [2023-08-27 07:34:15,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3426 conditions, 533 events. 317/533 cut-off events. For 5651/5651 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2064 event pairs, 20 based on Foata normal form. 14/547 useless extension candidates. Maximal degree in co-relation 3140. Up to 209 conditions per place. [2023-08-27 07:34:15,969 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 62 selfloop transitions, 92 changer transitions 3/157 dead transitions. [2023-08-27 07:34:15,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 157 transitions, 1977 flow [2023-08-27 07:34:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 07:34:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 07:34:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1249 transitions. [2023-08-27 07:34:15,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43534332520041824 [2023-08-27 07:34:15,973 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1249 transitions. [2023-08-27 07:34:15,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1249 transitions. [2023-08-27 07:34:15,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:15,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1249 transitions. [2023-08-27 07:34:15,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:15,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 151.0) internal successors, (3020), 20 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:15,981 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 151.0) internal successors, (3020), 20 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:15,981 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 1021 flow. Second operand 19 states and 1249 transitions. [2023-08-27 07:34:15,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 157 transitions, 1977 flow [2023-08-27 07:34:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1695 flow, removed 112 selfloop flow, removed 8 redundant places. [2023-08-27 07:34:16,004 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1429 flow [2023-08-27 07:34:16,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1429, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2023-08-27 07:34:16,004 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-08-27 07:34:16,004 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1429 flow [2023-08-27 07:34:16,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.92857142857143) internal successors, (881), 14 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:16,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:16,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:16,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:16,211 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:16,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash -756431335, now seen corresponding path program 5 times [2023-08-27 07:34:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819066919] [2023-08-27 07:34:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819066919] [2023-08-27 07:34:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819066919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670783756] [2023-08-27 07:34:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:34:16,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:16,329 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) [2023-08-27 07:34:16,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 07:34:16,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:16,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:16,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:34:16,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:16,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:16,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670783756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:16,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:16,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-27 07:34:16,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509746485] [2023-08-27 07:34:16,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 07:34:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 07:34:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:34:16,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:16,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1429 flow. Second operand has 14 states, 14 states have (on average 62.857142857142854) internal successors, (880), 14 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:16,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:16,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:16,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:17,009 INFO L124 PetriNetUnfolderBase]: 383/668 cut-off events. [2023-08-27 07:34:17,009 INFO L125 PetriNetUnfolderBase]: For 11950/11950 co-relation queries the response was YES. [2023-08-27 07:34:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 668 events. 383/668 cut-off events. For 11950/11950 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2847 event pairs, 32 based on Foata normal form. 26/694 useless extension candidates. Maximal degree in co-relation 4191. Up to 209 conditions per place. [2023-08-27 07:34:17,017 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 86 selfloop transitions, 92 changer transitions 8/186 dead transitions. [2023-08-27 07:34:17,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 2427 flow [2023-08-27 07:34:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 07:34:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 07:34:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1058 transitions. [2023-08-27 07:34:17,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379139072847682 [2023-08-27 07:34:17,021 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1058 transitions. [2023-08-27 07:34:17,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1058 transitions. [2023-08-27 07:34:17,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:17,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1058 transitions. [2023-08-27 07:34:17,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 66.125) internal successors, (1058), 16 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:17,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 151.0) internal successors, (2567), 17 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:17,030 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 151.0) internal successors, (2567), 17 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:17,030 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1429 flow. Second operand 16 states and 1058 transitions. [2023-08-27 07:34:17,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 2427 flow [2023-08-27 07:34:17,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 186 transitions, 2176 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-08-27 07:34:17,098 INFO L231 Difference]: Finished difference. Result has 118 places, 137 transitions, 1730 flow [2023-08-27 07:34:17,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1730, PETRI_PLACES=118, PETRI_TRANSITIONS=137} [2023-08-27 07:34:17,099 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 98 predicate places. [2023-08-27 07:34:17,099 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 137 transitions, 1730 flow [2023-08-27 07:34:17,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.857142857142854) internal successors, (880), 14 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:17,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:17,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:17,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:17,308 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,SelfDestructingSolverStorable9 [2023-08-27 07:34:17,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:17,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash -436235521, now seen corresponding path program 6 times [2023-08-27 07:34:17,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:17,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558121000] [2023-08-27 07:34:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:17,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:17,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558121000] [2023-08-27 07:34:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558121000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:17,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190534497] [2023-08-27 07:34:17,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:34:17,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:17,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:17,460 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) [2023-08-27 07:34:17,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 07:34:17,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 07:34:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:17,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:34:17,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:17,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:17,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190534497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:17,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:17,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-27 07:34:17,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652932981] [2023-08-27 07:34:17,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:17,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 07:34:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:17,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 07:34:17,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:34:17,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:17,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 137 transitions, 1730 flow. Second operand has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:17,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:17,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:18,312 INFO L124 PetriNetUnfolderBase]: 536/916 cut-off events. [2023-08-27 07:34:18,313 INFO L125 PetriNetUnfolderBase]: For 17565/17565 co-relation queries the response was YES. [2023-08-27 07:34:18,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 916 events. 536/916 cut-off events. For 17565/17565 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4174 event pairs, 85 based on Foata normal form. 40/956 useless extension candidates. Maximal degree in co-relation 6109. Up to 556 conditions per place. [2023-08-27 07:34:18,324 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 157 selfloop transitions, 113 changer transitions 3/273 dead transitions. [2023-08-27 07:34:18,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 273 transitions, 3874 flow [2023-08-27 07:34:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 07:34:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 07:34:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1586 transitions. [2023-08-27 07:34:18,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43763796909492275 [2023-08-27 07:34:18,332 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1586 transitions. [2023-08-27 07:34:18,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1586 transitions. [2023-08-27 07:34:18,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:18,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1586 transitions. [2023-08-27 07:34:18,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.08333333333333) internal successors, (1586), 24 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:18,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:18,342 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:18,342 INFO L175 Difference]: Start difference. First operand has 118 places, 137 transitions, 1730 flow. Second operand 24 states and 1586 transitions. [2023-08-27 07:34:18,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 273 transitions, 3874 flow [2023-08-27 07:34:18,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 273 transitions, 3705 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-08-27 07:34:18,393 INFO L231 Difference]: Finished difference. Result has 147 places, 203 transitions, 3076 flow [2023-08-27 07:34:18,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3076, PETRI_PLACES=147, PETRI_TRANSITIONS=203} [2023-08-27 07:34:18,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 127 predicate places. [2023-08-27 07:34:18,394 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 203 transitions, 3076 flow [2023-08-27 07:34:18,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.53333333333333) internal successors, (953), 15 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:18,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:18,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:18,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:18,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:18,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2034812603, now seen corresponding path program 7 times [2023-08-27 07:34:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:18,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510018012] [2023-08-27 07:34:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:18,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510018012] [2023-08-27 07:34:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510018012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118477103] [2023-08-27 07:34:18,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:34:18,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:18,710 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) [2023-08-27 07:34:18,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 07:34:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:18,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:34:18,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:18,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:18,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118477103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:18,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:18,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-27 07:34:18,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750044669] [2023-08-27 07:34:18,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 07:34:18,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 07:34:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:34:18,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:18,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 3076 flow. Second operand has 14 states, 14 states have (on average 62.857142857142854) internal successors, (880), 14 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:18,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:18,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:18,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:19,627 INFO L124 PetriNetUnfolderBase]: 593/1003 cut-off events. [2023-08-27 07:34:19,627 INFO L125 PetriNetUnfolderBase]: For 15038/15038 co-relation queries the response was YES. [2023-08-27 07:34:19,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7863 conditions, 1003 events. 593/1003 cut-off events. For 15038/15038 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4599 event pairs, 97 based on Foata normal form. 12/1015 useless extension candidates. Maximal degree in co-relation 7299. Up to 636 conditions per place. [2023-08-27 07:34:19,641 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 108 selfloop transitions, 137 changer transitions 5/250 dead transitions. [2023-08-27 07:34:19,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 250 transitions, 4211 flow [2023-08-27 07:34:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 07:34:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 07:34:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 917 transitions. [2023-08-27 07:34:19,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337748344370861 [2023-08-27 07:34:19,644 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 917 transitions. [2023-08-27 07:34:19,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 917 transitions. [2023-08-27 07:34:19,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:19,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 917 transitions. [2023-08-27 07:34:19,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.5) internal successors, (917), 14 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:19,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 151.0) internal successors, (2265), 15 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:19,655 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 151.0) internal successors, (2265), 15 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:19,656 INFO L175 Difference]: Start difference. First operand has 147 places, 203 transitions, 3076 flow. Second operand 14 states and 917 transitions. [2023-08-27 07:34:19,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 250 transitions, 4211 flow [2023-08-27 07:34:19,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 250 transitions, 3662 flow, removed 240 selfloop flow, removed 8 redundant places. [2023-08-27 07:34:19,730 INFO L231 Difference]: Finished difference. Result has 155 places, 229 transitions, 3473 flow [2023-08-27 07:34:19,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3473, PETRI_PLACES=155, PETRI_TRANSITIONS=229} [2023-08-27 07:34:19,731 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-08-27 07:34:19,731 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 229 transitions, 3473 flow [2023-08-27 07:34:19,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.857142857142854) internal successors, (880), 14 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:19,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:19,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:19,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:19,932 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,SelfDestructingSolverStorable11 [2023-08-27 07:34:19,933 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:19,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 435387147, now seen corresponding path program 8 times [2023-08-27 07:34:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772689244] [2023-08-27 07:34:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:20,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772689244] [2023-08-27 07:34:20,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772689244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:20,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019457958] [2023-08-27 07:34:20,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:34:20,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:20,049 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) [2023-08-27 07:34:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 07:34:20,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:20,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:34:20,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:20,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:20,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019457958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:20,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:20,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-27 07:34:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385990555] [2023-08-27 07:34:20,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:20,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 07:34:20,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 07:34:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:34:20,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:20,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 229 transitions, 3473 flow. Second operand has 15 states, 15 states have (on average 63.333333333333336) internal successors, (950), 15 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:20,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:20,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:20,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:20,756 INFO L124 PetriNetUnfolderBase]: 577/1005 cut-off events. [2023-08-27 07:34:20,757 INFO L125 PetriNetUnfolderBase]: For 16299/16299 co-relation queries the response was YES. [2023-08-27 07:34:20,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7816 conditions, 1005 events. 577/1005 cut-off events. For 16299/16299 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4719 event pairs, 82 based on Foata normal form. 28/1033 useless extension candidates. Maximal degree in co-relation 7327. Up to 557 conditions per place. [2023-08-27 07:34:20,774 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 106 selfloop transitions, 147 changer transitions 1/254 dead transitions. [2023-08-27 07:34:20,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 254 transitions, 4077 flow [2023-08-27 07:34:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 07:34:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 07:34:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1051 transitions. [2023-08-27 07:34:20,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43501655629139074 [2023-08-27 07:34:20,776 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1051 transitions. [2023-08-27 07:34:20,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1051 transitions. [2023-08-27 07:34:20,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:20,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1051 transitions. [2023-08-27 07:34:20,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.6875) internal successors, (1051), 16 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:20,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 151.0) internal successors, (2567), 17 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:20,781 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 151.0) internal successors, (2567), 17 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:20,781 INFO L175 Difference]: Start difference. First operand has 155 places, 229 transitions, 3473 flow. Second operand 16 states and 1051 transitions. [2023-08-27 07:34:20,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 254 transitions, 4077 flow [2023-08-27 07:34:20,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 254 transitions, 3879 flow, removed 67 selfloop flow, removed 4 redundant places. [2023-08-27 07:34:20,862 INFO L231 Difference]: Finished difference. Result has 167 places, 227 transitions, 3552 flow [2023-08-27 07:34:20,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3552, PETRI_PLACES=167, PETRI_TRANSITIONS=227} [2023-08-27 07:34:20,863 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2023-08-27 07:34:20,863 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 227 transitions, 3552 flow [2023-08-27 07:34:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.333333333333336) internal successors, (950), 15 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:20,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:21,070 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,SelfDestructingSolverStorable12 [2023-08-27 07:34:21,070 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:21,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1684307081, now seen corresponding path program 9 times [2023-08-27 07:34:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753231559] [2023-08-27 07:34:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:21,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:21,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753231559] [2023-08-27 07:34:21,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753231559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530758095] [2023-08-27 07:34:21,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:34:21,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:21,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:21,221 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) [2023-08-27 07:34:21,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 07:34:21,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:34:21,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:21,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 07:34:21,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:34:21,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:34:21,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530758095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:21,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:21,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-27 07:34:21,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014151598] [2023-08-27 07:34:21,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:21,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 07:34:21,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 07:34:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-27 07:34:21,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 151 [2023-08-27 07:34:21,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 227 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 73.11111111111111) internal successors, (658), 9 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:21,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:21,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 151 [2023-08-27 07:34:21,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:21,751 INFO L124 PetriNetUnfolderBase]: 769/1365 cut-off events. [2023-08-27 07:34:21,751 INFO L125 PetriNetUnfolderBase]: For 23175/23185 co-relation queries the response was YES. [2023-08-27 07:34:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11185 conditions, 1365 events. 769/1365 cut-off events. For 23175/23185 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7265 event pairs, 48 based on Foata normal form. 25/1387 useless extension candidates. Maximal degree in co-relation 10384. Up to 718 conditions per place. [2023-08-27 07:34:21,771 INFO L140 encePairwiseOnDemand]: 147/151 looper letters, 201 selfloop transitions, 93 changer transitions 41/343 dead transitions. [2023-08-27 07:34:21,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 343 transitions, 5965 flow [2023-08-27 07:34:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:34:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:34:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 391 transitions. [2023-08-27 07:34:21,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178807947019868 [2023-08-27 07:34:21,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 391 transitions. [2023-08-27 07:34:21,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 391 transitions. [2023-08-27 07:34:21,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:21,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 391 transitions. [2023-08-27 07:34:21,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:21,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:21,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:21,775 INFO L175 Difference]: Start difference. First operand has 167 places, 227 transitions, 3552 flow. Second operand 5 states and 391 transitions. [2023-08-27 07:34:21,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 343 transitions, 5965 flow [2023-08-27 07:34:21,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 343 transitions, 5495 flow, removed 47 selfloop flow, removed 15 redundant places. [2023-08-27 07:34:21,879 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 4065 flow [2023-08-27 07:34:21,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4065, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2023-08-27 07:34:21,880 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 139 predicate places. [2023-08-27 07:34:21,880 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 4065 flow [2023-08-27 07:34:21,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.11111111111111) internal successors, (658), 9 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:21,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:21,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:21,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:22,092 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,SelfDestructingSolverStorable13 [2023-08-27 07:34:22,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:22,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:22,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1243490159, now seen corresponding path program 10 times [2023-08-27 07:34:22,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:22,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203936481] [2023-08-27 07:34:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:22,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:22,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203936481] [2023-08-27 07:34:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203936481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876114772] [2023-08-27 07:34:22,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:34:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:22,263 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) [2023-08-27 07:34:22,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 07:34:22,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:34:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:22,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:22,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:22,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:22,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876114772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:22,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:22,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-27 07:34:22,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993689172] [2023-08-27 07:34:22,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 07:34:22,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 07:34:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-27 07:34:22,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:22,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 4065 flow. Second operand has 15 states, 15 states have (on average 63.2) internal successors, (948), 15 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:22,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:22,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:22,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:23,400 INFO L124 PetriNetUnfolderBase]: 1260/2105 cut-off events. [2023-08-27 07:34:23,400 INFO L125 PetriNetUnfolderBase]: For 31087/31087 co-relation queries the response was YES. [2023-08-27 07:34:23,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17940 conditions, 2105 events. 1260/2105 cut-off events. For 31087/31087 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11282 event pairs, 23 based on Foata normal form. 20/2125 useless extension candidates. Maximal degree in co-relation 17075. Up to 821 conditions per place. [2023-08-27 07:34:23,437 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 283 selfloop transitions, 236 changer transitions 8/527 dead transitions. [2023-08-27 07:34:23,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 527 transitions, 9329 flow [2023-08-27 07:34:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 07:34:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 07:34:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1392 transitions. [2023-08-27 07:34:23,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389782403027436 [2023-08-27 07:34:23,440 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1392 transitions. [2023-08-27 07:34:23,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1392 transitions. [2023-08-27 07:34:23,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:23,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1392 transitions. [2023-08-27 07:34:23,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.28571428571429) internal successors, (1392), 21 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:23,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 151.0) internal successors, (3322), 22 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:23,447 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 151.0) internal successors, (3322), 22 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:23,447 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 4065 flow. Second operand 21 states and 1392 transitions. [2023-08-27 07:34:23,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 527 transitions, 9329 flow [2023-08-27 07:34:23,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 527 transitions, 9210 flow, removed 57 selfloop flow, removed 1 redundant places. [2023-08-27 07:34:23,558 INFO L231 Difference]: Finished difference. Result has 189 places, 413 transitions, 7583 flow [2023-08-27 07:34:23,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7583, PETRI_PLACES=189, PETRI_TRANSITIONS=413} [2023-08-27 07:34:23,559 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 169 predicate places. [2023-08-27 07:34:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 413 transitions, 7583 flow [2023-08-27 07:34:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.2) internal successors, (948), 15 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:23,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:23,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:23,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:23,765 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,SelfDestructingSolverStorable14 [2023-08-27 07:34:23,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:23,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1703850681, now seen corresponding path program 11 times [2023-08-27 07:34:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:23,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641320577] [2023-08-27 07:34:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:23,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641320577] [2023-08-27 07:34:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641320577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644826780] [2023-08-27 07:34:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:34:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:23,903 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) [2023-08-27 07:34:23,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 07:34:23,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:23,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:23,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:24,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644826780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:24,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-27 07:34:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578474457] [2023-08-27 07:34:24,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 07:34:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 07:34:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:34:24,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:24,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 413 transitions, 7583 flow. Second operand has 18 states, 18 states have (on average 62.72222222222222) internal successors, (1129), 18 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:25,752 INFO L124 PetriNetUnfolderBase]: 1365/2296 cut-off events. [2023-08-27 07:34:25,752 INFO L125 PetriNetUnfolderBase]: For 47769/47769 co-relation queries the response was YES. [2023-08-27 07:34:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21615 conditions, 2296 events. 1365/2296 cut-off events. For 47769/47769 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12740 event pairs, 87 based on Foata normal form. 34/2330 useless extension candidates. Maximal degree in co-relation 20811. Up to 854 conditions per place. [2023-08-27 07:34:25,787 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 275 selfloop transitions, 250 changer transitions 0/525 dead transitions. [2023-08-27 07:34:25,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 525 transitions, 10218 flow [2023-08-27 07:34:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 07:34:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 07:34:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1710 transitions. [2023-08-27 07:34:25,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43555781966377993 [2023-08-27 07:34:25,790 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1710 transitions. [2023-08-27 07:34:25,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1710 transitions. [2023-08-27 07:34:25,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:25,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1710 transitions. [2023-08-27 07:34:25,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.76923076923077) internal successors, (1710), 26 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:25,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:25,798 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:25,798 INFO L175 Difference]: Start difference. First operand has 189 places, 413 transitions, 7583 flow. Second operand 26 states and 1710 transitions. [2023-08-27 07:34:25,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 525 transitions, 10218 flow [2023-08-27 07:34:25,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 525 transitions, 9157 flow, removed 434 selfloop flow, removed 6 redundant places. [2023-08-27 07:34:25,995 INFO L231 Difference]: Finished difference. Result has 217 places, 451 transitions, 8211 flow [2023-08-27 07:34:25,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=6825, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8211, PETRI_PLACES=217, PETRI_TRANSITIONS=451} [2023-08-27 07:34:25,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-27 07:34:25,996 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 451 transitions, 8211 flow [2023-08-27 07:34:25,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.72222222222222) internal successors, (1129), 18 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:25,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:25,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:26,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:26,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:26,201 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:26,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1988785017, now seen corresponding path program 12 times [2023-08-27 07:34:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047348765] [2023-08-27 07:34:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:26,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:26,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047348765] [2023-08-27 07:34:26,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047348765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:26,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267428679] [2023-08-27 07:34:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:34:26,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:26,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:26,429 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) [2023-08-27 07:34:26,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 07:34:26,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 07:34:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:26,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:26,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:26,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:26,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267428679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:26,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:26,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-27 07:34:26,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106555305] [2023-08-27 07:34:26,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 07:34:26,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 07:34:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-27 07:34:26,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:26,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 451 transitions, 8211 flow. Second operand has 22 states, 22 states have (on average 62.54545454545455) internal successors, (1376), 22 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:26,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:26,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:26,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:28,317 INFO L124 PetriNetUnfolderBase]: 1608/2645 cut-off events. [2023-08-27 07:34:28,317 INFO L125 PetriNetUnfolderBase]: For 56022/56022 co-relation queries the response was YES. [2023-08-27 07:34:28,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25145 conditions, 2645 events. 1608/2645 cut-off events. For 56022/56022 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 14730 event pairs, 142 based on Foata normal form. 26/2671 useless extension candidates. Maximal degree in co-relation 24299. Up to 1162 conditions per place. [2023-08-27 07:34:28,352 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 196 selfloop transitions, 489 changer transitions 16/701 dead transitions. [2023-08-27 07:34:28,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 701 transitions, 14118 flow [2023-08-27 07:34:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 07:34:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 07:34:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2552 transitions. [2023-08-27 07:34:28,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4333503141450161 [2023-08-27 07:34:28,357 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2552 transitions. [2023-08-27 07:34:28,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2552 transitions. [2023-08-27 07:34:28,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:28,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2552 transitions. [2023-08-27 07:34:28,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 65.43589743589743) internal successors, (2552), 39 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:28,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:28,367 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:28,367 INFO L175 Difference]: Start difference. First operand has 217 places, 451 transitions, 8211 flow. Second operand 39 states and 2552 transitions. [2023-08-27 07:34:28,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 701 transitions, 14118 flow [2023-08-27 07:34:28,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 701 transitions, 13635 flow, removed 142 selfloop flow, removed 13 redundant places. [2023-08-27 07:34:28,712 INFO L231 Difference]: Finished difference. Result has 246 places, 612 transitions, 12673 flow [2023-08-27 07:34:28,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=7854, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12673, PETRI_PLACES=246, PETRI_TRANSITIONS=612} [2023-08-27 07:34:28,713 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 226 predicate places. [2023-08-27 07:34:28,713 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 612 transitions, 12673 flow [2023-08-27 07:34:28,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.54545454545455) internal successors, (1376), 22 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:28,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:28,713 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:28,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:28,918 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,SelfDestructingSolverStorable16 [2023-08-27 07:34:28,918 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:28,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1096610311, now seen corresponding path program 13 times [2023-08-27 07:34:28,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:28,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586252054] [2023-08-27 07:34:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586252054] [2023-08-27 07:34:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586252054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174493002] [2023-08-27 07:34:29,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:34:29,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:29,161 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) [2023-08-27 07:34:29,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 07:34:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:29,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:29,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:29,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:29,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174493002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:29,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:29,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-08-27 07:34:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897152000] [2023-08-27 07:34:29,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:34:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:34:29,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-08-27 07:34:29,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:29,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 612 transitions, 12673 flow. Second operand has 23 states, 23 states have (on average 62.47826086956522) internal successors, (1437), 23 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:29,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:29,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:29,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:31,435 INFO L124 PetriNetUnfolderBase]: 1603/2676 cut-off events. [2023-08-27 07:34:31,435 INFO L125 PetriNetUnfolderBase]: For 69908/69908 co-relation queries the response was YES. [2023-08-27 07:34:31,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 2676 events. 1603/2676 cut-off events. For 69908/69908 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 15173 event pairs, 90 based on Foata normal form. 64/2740 useless extension candidates. Maximal degree in co-relation 25411. Up to 910 conditions per place. [2023-08-27 07:34:31,466 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 179 selfloop transitions, 537 changer transitions 3/719 dead transitions. [2023-08-27 07:34:31,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 719 transitions, 14854 flow [2023-08-27 07:34:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 07:34:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 07:34:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3080 transitions. [2023-08-27 07:34:31,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339861913484571 [2023-08-27 07:34:31,471 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3080 transitions. [2023-08-27 07:34:31,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3080 transitions. [2023-08-27 07:34:31,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:31,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3080 transitions. [2023-08-27 07:34:31,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 65.53191489361703) internal successors, (3080), 47 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:31,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 151.0) internal successors, (7248), 48 states have internal predecessors, (7248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:31,483 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 151.0) internal successors, (7248), 48 states have internal predecessors, (7248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:31,484 INFO L175 Difference]: Start difference. First operand has 246 places, 612 transitions, 12673 flow. Second operand 47 states and 3080 transitions. [2023-08-27 07:34:31,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 719 transitions, 14854 flow [2023-08-27 07:34:31,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 719 transitions, 12930 flow, removed 731 selfloop flow, removed 16 redundant places. [2023-08-27 07:34:31,958 INFO L231 Difference]: Finished difference. Result has 277 places, 627 transitions, 12142 flow [2023-08-27 07:34:31,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=10531, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=12142, PETRI_PLACES=277, PETRI_TRANSITIONS=627} [2023-08-27 07:34:31,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 257 predicate places. [2023-08-27 07:34:31,959 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 627 transitions, 12142 flow [2023-08-27 07:34:31,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.47826086956522) internal successors, (1437), 23 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:31,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:31,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:31,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:32,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 07:34:32,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:32,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:32,166 INFO L85 PathProgramCache]: Analyzing trace with hash -949474729, now seen corresponding path program 14 times [2023-08-27 07:34:32,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:32,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192505394] [2023-08-27 07:34:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:32,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:32,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:32,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192505394] [2023-08-27 07:34:32,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192505394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:32,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334001069] [2023-08-27 07:34:32,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:34:32,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:32,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:32,322 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) [2023-08-27 07:34:32,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 07:34:32,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:32,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:32,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:32,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:32,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:32,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334001069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:32,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:32,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-27 07:34:32,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139767689] [2023-08-27 07:34:32,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:32,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 07:34:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 07:34:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:34:32,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:32,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 627 transitions, 12142 flow. Second operand has 17 states, 17 states have (on average 62.88235294117647) internal successors, (1069), 17 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:32,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:32,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:32,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:34,617 INFO L124 PetriNetUnfolderBase]: 1762/2959 cut-off events. [2023-08-27 07:34:34,618 INFO L125 PetriNetUnfolderBase]: For 43133/43133 co-relation queries the response was YES. [2023-08-27 07:34:34,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26613 conditions, 2959 events. 1762/2959 cut-off events. For 43133/43133 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 17319 event pairs, 102 based on Foata normal form. 56/3015 useless extension candidates. Maximal degree in co-relation 26139. Up to 944 conditions per place. [2023-08-27 07:34:34,649 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 328 selfloop transitions, 442 changer transitions 14/784 dead transitions. [2023-08-27 07:34:34,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 784 transitions, 15681 flow [2023-08-27 07:34:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 07:34:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 07:34:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2690 transitions. [2023-08-27 07:34:34,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345016960103376 [2023-08-27 07:34:34,653 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2690 transitions. [2023-08-27 07:34:34,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2690 transitions. [2023-08-27 07:34:34,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:34,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2690 transitions. [2023-08-27 07:34:34,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.60975609756098) internal successors, (2690), 41 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:34,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:34,663 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:34,663 INFO L175 Difference]: Start difference. First operand has 277 places, 627 transitions, 12142 flow. Second operand 41 states and 2690 transitions. [2023-08-27 07:34:34,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 784 transitions, 15681 flow [2023-08-27 07:34:35,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 784 transitions, 14835 flow, removed 110 selfloop flow, removed 35 redundant places. [2023-08-27 07:34:35,059 INFO L231 Difference]: Finished difference. Result has 294 places, 684 transitions, 13835 flow [2023-08-27 07:34:35,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=11241, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13835, PETRI_PLACES=294, PETRI_TRANSITIONS=684} [2023-08-27 07:34:35,060 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 274 predicate places. [2023-08-27 07:34:35,060 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 684 transitions, 13835 flow [2023-08-27 07:34:35,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.88235294117647) internal successors, (1069), 17 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:35,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:35,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:35,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:35,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:35,266 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:35,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -182846505, now seen corresponding path program 15 times [2023-08-27 07:34:35,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:35,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369601335] [2023-08-27 07:34:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:35,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:35,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369601335] [2023-08-27 07:34:35,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369601335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:35,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945217332] [2023-08-27 07:34:35,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:34:35,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:35,414 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) [2023-08-27 07:34:35,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 07:34:35,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:34:35,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:35,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:35,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:35,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:35,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945217332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:35,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:35,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-27 07:34:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920824317] [2023-08-27 07:34:35,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:35,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:34:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:34:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:34:35,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:35,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 684 transitions, 13835 flow. Second operand has 16 states, 16 states have (on average 62.9375) internal successors, (1007), 16 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:35,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:35,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:35,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:37,427 INFO L124 PetriNetUnfolderBase]: 2091/3536 cut-off events. [2023-08-27 07:34:37,427 INFO L125 PetriNetUnfolderBase]: For 54942/54942 co-relation queries the response was YES. [2023-08-27 07:34:37,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33252 conditions, 3536 events. 2091/3536 cut-off events. For 54942/54942 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21498 event pairs, 368 based on Foata normal form. 22/3558 useless extension candidates. Maximal degree in co-relation 32703. Up to 2434 conditions per place. [2023-08-27 07:34:37,467 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 656 selfloop transitions, 272 changer transitions 0/928 dead transitions. [2023-08-27 07:34:37,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 928 transitions, 19734 flow [2023-08-27 07:34:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 07:34:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 07:34:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2629 transitions. [2023-08-27 07:34:37,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43526490066225165 [2023-08-27 07:34:37,475 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2629 transitions. [2023-08-27 07:34:37,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2629 transitions. [2023-08-27 07:34:37,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:37,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2629 transitions. [2023-08-27 07:34:37,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.725) internal successors, (2629), 40 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:37,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 151.0) internal successors, (6191), 41 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:37,485 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 151.0) internal successors, (6191), 41 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:37,485 INFO L175 Difference]: Start difference. First operand has 294 places, 684 transitions, 13835 flow. Second operand 40 states and 2629 transitions. [2023-08-27 07:34:37,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 928 transitions, 19734 flow [2023-08-27 07:34:38,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 928 transitions, 19208 flow, removed 210 selfloop flow, removed 15 redundant places. [2023-08-27 07:34:38,159 INFO L231 Difference]: Finished difference. Result has 332 places, 785 transitions, 16527 flow [2023-08-27 07:34:38,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=13455, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=16527, PETRI_PLACES=332, PETRI_TRANSITIONS=785} [2023-08-27 07:34:38,160 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 312 predicate places. [2023-08-27 07:34:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 785 transitions, 16527 flow [2023-08-27 07:34:38,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.9375) internal successors, (1007), 16 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:38,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:38,161 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:38,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-27 07:34:38,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:38,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:38,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash -166599333, now seen corresponding path program 16 times [2023-08-27 07:34:38,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:38,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273451558] [2023-08-27 07:34:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273451558] [2023-08-27 07:34:38,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273451558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:38,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37197816] [2023-08-27 07:34:38,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:34:38,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:38,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:38,503 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) [2023-08-27 07:34:38,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 07:34:38,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:34:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:38,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:38,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:38,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:38,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37197816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:38,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:38,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-27 07:34:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367874054] [2023-08-27 07:34:38,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 07:34:38,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 07:34:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:34:38,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:38,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 785 transitions, 16527 flow. Second operand has 18 states, 18 states have (on average 62.833333333333336) internal successors, (1131), 18 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:38,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:38,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:38,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:41,335 INFO L124 PetriNetUnfolderBase]: 2402/4083 cut-off events. [2023-08-27 07:34:41,335 INFO L125 PetriNetUnfolderBase]: For 76989/76989 co-relation queries the response was YES. [2023-08-27 07:34:41,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39288 conditions, 4083 events. 2402/4083 cut-off events. For 76989/76989 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 25897 event pairs, 366 based on Foata normal form. 42/4125 useless extension candidates. Maximal degree in co-relation 38691. Up to 2692 conditions per place. [2023-08-27 07:34:41,466 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 609 selfloop transitions, 385 changer transitions 14/1008 dead transitions. [2023-08-27 07:34:41,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1008 transitions, 22338 flow [2023-08-27 07:34:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 07:34:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 07:34:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2868 transitions. [2023-08-27 07:34:41,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316676700782661 [2023-08-27 07:34:41,470 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2868 transitions. [2023-08-27 07:34:41,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2868 transitions. [2023-08-27 07:34:41,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:41,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2868 transitions. [2023-08-27 07:34:41,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 65.18181818181819) internal successors, (2868), 44 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:41,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:41,481 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:41,481 INFO L175 Difference]: Start difference. First operand has 332 places, 785 transitions, 16527 flow. Second operand 44 states and 2868 transitions. [2023-08-27 07:34:41,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1008 transitions, 22338 flow [2023-08-27 07:34:42,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1008 transitions, 21756 flow, removed 232 selfloop flow, removed 11 redundant places. [2023-08-27 07:34:42,221 INFO L231 Difference]: Finished difference. Result has 375 places, 876 transitions, 19469 flow [2023-08-27 07:34:42,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=15855, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19469, PETRI_PLACES=375, PETRI_TRANSITIONS=876} [2023-08-27 07:34:42,222 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 355 predicate places. [2023-08-27 07:34:42,222 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 876 transitions, 19469 flow [2023-08-27 07:34:42,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.833333333333336) internal successors, (1131), 18 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:42,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:42,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:42,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:42,428 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:42,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1302380341, now seen corresponding path program 17 times [2023-08-27 07:34:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:42,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918327187] [2023-08-27 07:34:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:42,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:42,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918327187] [2023-08-27 07:34:42,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918327187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:42,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771536629] [2023-08-27 07:34:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:34:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:42,618 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) [2023-08-27 07:34:42,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 07:34:42,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:34:42,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:42,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:42,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:42,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:42,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771536629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:42,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:42,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-27 07:34:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942083712] [2023-08-27 07:34:42,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 07:34:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 07:34:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:34:42,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:42,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 876 transitions, 19469 flow. Second operand has 17 states, 17 states have (on average 62.64705882352941) internal successors, (1065), 17 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:42,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:42,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:42,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:46,557 INFO L124 PetriNetUnfolderBase]: 2576/4365 cut-off events. [2023-08-27 07:34:46,557 INFO L125 PetriNetUnfolderBase]: For 81530/81530 co-relation queries the response was YES. [2023-08-27 07:34:46,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43567 conditions, 4365 events. 2576/4365 cut-off events. For 81530/81530 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27541 event pairs, 605 based on Foata normal form. 28/4393 useless extension candidates. Maximal degree in co-relation 42995. Up to 3483 conditions per place. [2023-08-27 07:34:46,606 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 752 selfloop transitions, 260 changer transitions 17/1029 dead transitions. [2023-08-27 07:34:46,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1029 transitions, 23895 flow [2023-08-27 07:34:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 07:34:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 07:34:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2159 transitions. [2023-08-27 07:34:46,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43327312863736706 [2023-08-27 07:34:46,609 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2159 transitions. [2023-08-27 07:34:46,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2159 transitions. [2023-08-27 07:34:46,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:46,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2159 transitions. [2023-08-27 07:34:46,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 65.42424242424242) internal successors, (2159), 33 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:46,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 151.0) internal successors, (5134), 34 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:46,618 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 151.0) internal successors, (5134), 34 states have internal predecessors, (5134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:46,618 INFO L175 Difference]: Start difference. First operand has 375 places, 876 transitions, 19469 flow. Second operand 33 states and 2159 transitions. [2023-08-27 07:34:46,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1029 transitions, 23895 flow [2023-08-27 07:34:47,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1029 transitions, 23358 flow, removed 168 selfloop flow, removed 26 redundant places. [2023-08-27 07:34:47,600 INFO L231 Difference]: Finished difference. Result has 396 places, 949 transitions, 21533 flow [2023-08-27 07:34:47,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=18827, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21533, PETRI_PLACES=396, PETRI_TRANSITIONS=949} [2023-08-27 07:34:47,601 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 376 predicate places. [2023-08-27 07:34:47,601 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 949 transitions, 21533 flow [2023-08-27 07:34:47,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.64705882352941) internal successors, (1065), 17 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:47,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:47,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:47,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-27 07:34:47,802 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,SelfDestructingSolverStorable21 [2023-08-27 07:34:47,803 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:47,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:47,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1016326147, now seen corresponding path program 18 times [2023-08-27 07:34:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:47,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781752152] [2023-08-27 07:34:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:47,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:47,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781752152] [2023-08-27 07:34:47,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781752152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:47,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473074616] [2023-08-27 07:34:47,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:34:47,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:47,941 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) [2023-08-27 07:34:47,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 07:34:48,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 07:34:48,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:48,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:48,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:48,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:48,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473074616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:48,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:48,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-27 07:34:48,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747825622] [2023-08-27 07:34:48,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:34:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:34:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:34:48,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:48,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 949 transitions, 21533 flow. Second operand has 16 states, 16 states have (on average 62.9375) internal successors, (1007), 16 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:48,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:48,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:50,717 INFO L124 PetriNetUnfolderBase]: 2815/4792 cut-off events. [2023-08-27 07:34:50,717 INFO L125 PetriNetUnfolderBase]: For 100313/100313 co-relation queries the response was YES. [2023-08-27 07:34:50,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49471 conditions, 4792 events. 2815/4792 cut-off events. For 100313/100313 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 31046 event pairs, 678 based on Foata normal form. 28/4820 useless extension candidates. Maximal degree in co-relation 49017. Up to 3932 conditions per place. [2023-08-27 07:34:50,785 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 940 selfloop transitions, 203 changer transitions 5/1148 dead transitions. [2023-08-27 07:34:50,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1148 transitions, 27692 flow [2023-08-27 07:34:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 07:34:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 07:34:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2426 transitions. [2023-08-27 07:34:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43422230177197063 [2023-08-27 07:34:50,788 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2426 transitions. [2023-08-27 07:34:50,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2426 transitions. [2023-08-27 07:34:50,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:50,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2426 transitions. [2023-08-27 07:34:50,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.56756756756756) internal successors, (2426), 37 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:50,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:50,797 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:50,797 INFO L175 Difference]: Start difference. First operand has 396 places, 949 transitions, 21533 flow. Second operand 37 states and 2426 transitions. [2023-08-27 07:34:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1148 transitions, 27692 flow [2023-08-27 07:34:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1148 transitions, 26830 flow, removed 325 selfloop flow, removed 18 redundant places. [2023-08-27 07:34:52,082 INFO L231 Difference]: Finished difference. Result has 422 places, 1026 transitions, 23610 flow [2023-08-27 07:34:52,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=20977, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23610, PETRI_PLACES=422, PETRI_TRANSITIONS=1026} [2023-08-27 07:34:52,083 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 402 predicate places. [2023-08-27 07:34:52,084 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1026 transitions, 23610 flow [2023-08-27 07:34:52,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.9375) internal successors, (1007), 16 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:52,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:52,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:52,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:52,289 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,SelfDestructingSolverStorable22 [2023-08-27 07:34:52,289 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:52,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash -380543171, now seen corresponding path program 19 times [2023-08-27 07:34:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481904700] [2023-08-27 07:34:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:52,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:52,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481904700] [2023-08-27 07:34:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481904700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453502051] [2023-08-27 07:34:52,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:34:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:52,476 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) [2023-08-27 07:34:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 07:34:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:52,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:52,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:52,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:52,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453502051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:52,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:52,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-27 07:34:52,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229758131] [2023-08-27 07:34:52,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:34:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:34:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:34:52,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:52,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1026 transitions, 23610 flow. Second operand has 16 states, 16 states have (on average 62.6875) internal successors, (1003), 16 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:52,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:52,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:52,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:34:54,970 INFO L124 PetriNetUnfolderBase]: 2949/5014 cut-off events. [2023-08-27 07:34:54,971 INFO L125 PetriNetUnfolderBase]: For 115822/115822 co-relation queries the response was YES. [2023-08-27 07:34:55,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52151 conditions, 5014 events. 2949/5014 cut-off events. For 115822/115822 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32743 event pairs, 758 based on Foata normal form. 48/5062 useless extension candidates. Maximal degree in co-relation 51287. Up to 4448 conditions per place. [2023-08-27 07:34:55,038 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 1040 selfloop transitions, 148 changer transitions 0/1188 dead transitions. [2023-08-27 07:34:55,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1188 transitions, 28457 flow [2023-08-27 07:34:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 07:34:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 07:34:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2429 transitions. [2023-08-27 07:34:55,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43475926257383213 [2023-08-27 07:34:55,042 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2429 transitions. [2023-08-27 07:34:55,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2429 transitions. [2023-08-27 07:34:55,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:34:55,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2429 transitions. [2023-08-27 07:34:55,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.64864864864865) internal successors, (2429), 37 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:55,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:55,051 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:55,052 INFO L175 Difference]: Start difference. First operand has 422 places, 1026 transitions, 23610 flow. Second operand 37 states and 2429 transitions. [2023-08-27 07:34:55,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1188 transitions, 28457 flow [2023-08-27 07:34:56,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1188 transitions, 27837 flow, removed 278 selfloop flow, removed 13 redundant places. [2023-08-27 07:34:56,744 INFO L231 Difference]: Finished difference. Result has 460 places, 1087 transitions, 24857 flow [2023-08-27 07:34:56,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=22990, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24857, PETRI_PLACES=460, PETRI_TRANSITIONS=1087} [2023-08-27 07:34:56,747 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 440 predicate places. [2023-08-27 07:34:56,747 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1087 transitions, 24857 flow [2023-08-27 07:34:56,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 62.6875) internal successors, (1003), 16 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:56,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:34:56,747 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:34:56,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 07:34:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:56,953 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:34:56,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:34:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1574469643, now seen corresponding path program 20 times [2023-08-27 07:34:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:34:56,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080227141] [2023-08-27 07:34:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:34:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:34:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:34:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:57,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:34:57,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080227141] [2023-08-27 07:34:57,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080227141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:34:57,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392258322] [2023-08-27 07:34:57,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:34:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:34:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:34:57,184 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) [2023-08-27 07:34:57,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 07:34:57,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:34:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:34:57,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:34:57,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:34:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:57,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:34:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:34:57,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392258322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:34:57,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:34:57,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-27 07:34:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148667482] [2023-08-27 07:34:57,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:34:57,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:34:57,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:34:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:34:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:34:57,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:34:57,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1087 transitions, 24857 flow. Second operand has 21 states, 21 states have (on average 62.57142857142857) internal successors, (1314), 21 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:34:57,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:34:57,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:34:57,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:00,707 INFO L124 PetriNetUnfolderBase]: 3128/5283 cut-off events. [2023-08-27 07:35:00,707 INFO L125 PetriNetUnfolderBase]: For 128198/128198 co-relation queries the response was YES. [2023-08-27 07:35:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55998 conditions, 5283 events. 3128/5283 cut-off events. For 128198/128198 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34544 event pairs, 519 based on Foata normal form. 22/5305 useless extension candidates. Maximal degree in co-relation 55197. Up to 3399 conditions per place. [2023-08-27 07:35:00,782 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 547 selfloop transitions, 699 changer transitions 15/1261 dead transitions. [2023-08-27 07:35:00,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 1261 transitions, 30762 flow [2023-08-27 07:35:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 07:35:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 07:35:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2027 transitions. [2023-08-27 07:35:00,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330271309549242 [2023-08-27 07:35:00,785 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2027 transitions. [2023-08-27 07:35:00,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2027 transitions. [2023-08-27 07:35:00,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:00,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2027 transitions. [2023-08-27 07:35:00,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 65.38709677419355) internal successors, (2027), 31 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:00,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 151.0) internal successors, (4832), 32 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:00,791 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 151.0) internal successors, (4832), 32 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:00,792 INFO L175 Difference]: Start difference. First operand has 460 places, 1087 transitions, 24857 flow. Second operand 31 states and 2027 transitions. [2023-08-27 07:35:00,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 1261 transitions, 30762 flow [2023-08-27 07:35:02,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1261 transitions, 29810 flow, removed 405 selfloop flow, removed 15 redundant places. [2023-08-27 07:35:02,383 INFO L231 Difference]: Finished difference. Result has 484 places, 1200 transitions, 29043 flow [2023-08-27 07:35:02,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=23954, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=29043, PETRI_PLACES=484, PETRI_TRANSITIONS=1200} [2023-08-27 07:35:02,384 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 464 predicate places. [2023-08-27 07:35:02,384 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1200 transitions, 29043 flow [2023-08-27 07:35:02,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.57142857142857) internal successors, (1314), 21 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:02,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:02,385 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:02,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:02,593 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:35:02,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash 640687511, now seen corresponding path program 21 times [2023-08-27 07:35:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:02,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004632392] [2023-08-27 07:35:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:02,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:02,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004632392] [2023-08-27 07:35:02,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004632392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:02,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702057824] [2023-08-27 07:35:02,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:35:02,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:02,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:02,833 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:35:02,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 07:35:02,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 07:35:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:02,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:35:02,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:03,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702057824] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:03,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-27 07:35:03,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270600297] [2023-08-27 07:35:03,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:35:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:35:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:35:03,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:35:03,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1200 transitions, 29043 flow. Second operand has 21 states, 21 states have (on average 62.666666666666664) internal successors, (1316), 21 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:03,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:03,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:35:03,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:07,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:35:09,302 INFO L124 PetriNetUnfolderBase]: 3142/5328 cut-off events. [2023-08-27 07:35:09,302 INFO L125 PetriNetUnfolderBase]: For 154301/154301 co-relation queries the response was YES. [2023-08-27 07:35:09,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59620 conditions, 5328 events. 3142/5328 cut-off events. For 154301/154301 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35136 event pairs, 374 based on Foata normal form. 46/5374 useless extension candidates. Maximal degree in co-relation 58747. Up to 2803 conditions per place. [2023-08-27 07:35:09,386 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 468 selfloop transitions, 811 changer transitions 3/1282 dead transitions. [2023-08-27 07:35:09,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1282 transitions, 32681 flow [2023-08-27 07:35:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 07:35:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 07:35:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2424 transitions. [2023-08-27 07:35:09,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433864327904063 [2023-08-27 07:35:09,389 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2424 transitions. [2023-08-27 07:35:09,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2424 transitions. [2023-08-27 07:35:09,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:09,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2424 transitions. [2023-08-27 07:35:09,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.51351351351352) internal successors, (2424), 37 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,397 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:09,397 INFO L175 Difference]: Start difference. First operand has 484 places, 1200 transitions, 29043 flow. Second operand 37 states and 2424 transitions. [2023-08-27 07:35:09,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1282 transitions, 32681 flow [2023-08-27 07:35:11,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 1282 transitions, 31559 flow, removed 504 selfloop flow, removed 15 redundant places. [2023-08-27 07:35:11,531 INFO L231 Difference]: Finished difference. Result has 506 places, 1218 transitions, 30261 flow [2023-08-27 07:35:11,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=27935, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=30261, PETRI_PLACES=506, PETRI_TRANSITIONS=1218} [2023-08-27 07:35:11,532 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-08-27 07:35:11,533 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1218 transitions, 30261 flow [2023-08-27 07:35:11,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.666666666666664) internal successors, (1316), 21 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:11,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:11,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:11,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:11,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 07:35:11,734 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:35:11,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -329128943, now seen corresponding path program 22 times [2023-08-27 07:35:11,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:11,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596235456] [2023-08-27 07:35:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:11,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596235456] [2023-08-27 07:35:11,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596235456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113628797] [2023-08-27 07:35:11,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:35:11,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:11,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:11,857 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:35:11,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 07:35:11,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:35:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:11,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 07:35:11,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:12,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113628797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:12,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:12,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-27 07:35:12,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793249332] [2023-08-27 07:35:12,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 07:35:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 07:35:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:35:12,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:35:12,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1218 transitions, 30261 flow. Second operand has 17 states, 17 states have (on average 62.88235294117647) internal successors, (1069), 17 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:12,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:12,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:35:12,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:15,644 INFO L124 PetriNetUnfolderBase]: 3409/5807 cut-off events. [2023-08-27 07:35:15,644 INFO L125 PetriNetUnfolderBase]: For 164081/164081 co-relation queries the response was YES. [2023-08-27 07:35:15,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65909 conditions, 5807 events. 3409/5807 cut-off events. For 164081/164081 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39008 event pairs, 636 based on Foata normal form. 26/5833 useless extension candidates. Maximal degree in co-relation 65332. Up to 3979 conditions per place. [2023-08-27 07:35:15,734 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 892 selfloop transitions, 492 changer transitions 12/1396 dead transitions. [2023-08-27 07:35:15,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1396 transitions, 36375 flow [2023-08-27 07:35:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 07:35:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 07:35:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2416 transitions. [2023-08-27 07:35:15,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-08-27 07:35:15,737 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2416 transitions. [2023-08-27 07:35:15,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2416 transitions. [2023-08-27 07:35:15,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:15,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2416 transitions. [2023-08-27 07:35:15,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.29729729729729) internal successors, (2416), 37 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,745 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 151.0) internal successors, (5738), 38 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:15,745 INFO L175 Difference]: Start difference. First operand has 506 places, 1218 transitions, 30261 flow. Second operand 37 states and 2416 transitions. [2023-08-27 07:35:15,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1396 transitions, 36375 flow [2023-08-27 07:35:17,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1396 transitions, 34600 flow, removed 191 selfloop flow, removed 28 redundant places. [2023-08-27 07:35:17,799 INFO L231 Difference]: Finished difference. Result has 526 places, 1316 transitions, 32849 flow [2023-08-27 07:35:17,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=28608, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=32849, PETRI_PLACES=526, PETRI_TRANSITIONS=1316} [2023-08-27 07:35:17,800 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 506 predicate places. [2023-08-27 07:35:17,801 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 1316 transitions, 32849 flow [2023-08-27 07:35:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 62.88235294117647) internal successors, (1069), 17 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:17,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:17,801 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:17,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-27 07:35:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 07:35:18,002 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:35:18,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2023257215, now seen corresponding path program 23 times [2023-08-27 07:35:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:18,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097275947] [2023-08-27 07:35:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:18,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:18,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097275947] [2023-08-27 07:35:18,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097275947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:18,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364420521] [2023-08-27 07:35:18,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:35:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:18,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:18,153 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:35:18,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 07:35:18,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 07:35:18,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:18,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 07:35:18,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:18,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:35:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364420521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:18,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-08-27 07:35:18,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143334597] [2023-08-27 07:35:18,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 07:35:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 07:35:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-27 07:35:18,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 151 [2023-08-27 07:35:18,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 1316 transitions, 32849 flow. Second operand has 11 states, 11 states have (on average 72.72727272727273) internal successors, (800), 11 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:18,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:18,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 151 [2023-08-27 07:35:18,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:21,603 INFO L124 PetriNetUnfolderBase]: 4478/7762 cut-off events. [2023-08-27 07:35:21,603 INFO L125 PetriNetUnfolderBase]: For 236298/236306 co-relation queries the response was YES. [2023-08-27 07:35:21,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89726 conditions, 7762 events. 4478/7762 cut-off events. For 236298/236306 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 56086 event pairs, 182 based on Foata normal form. 42/7801 useless extension candidates. Maximal degree in co-relation 89132. Up to 4143 conditions per place. [2023-08-27 07:35:21,745 INFO L140 encePairwiseOnDemand]: 147/151 looper letters, 1059 selfloop transitions, 640 changer transitions 120/1829 dead transitions. [2023-08-27 07:35:21,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 1829 transitions, 49332 flow [2023-08-27 07:35:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:35:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:35:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2023-08-27 07:35:21,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198675496688742 [2023-08-27 07:35:21,746 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 471 transitions. [2023-08-27 07:35:21,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 471 transitions. [2023-08-27 07:35:21,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:21,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 471 transitions. [2023-08-27 07:35:21,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.5) internal successors, (471), 6 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:21,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:21,748 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:21,748 INFO L175 Difference]: Start difference. First operand has 526 places, 1316 transitions, 32849 flow. Second operand 6 states and 471 transitions. [2023-08-27 07:35:21,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 1829 transitions, 49332 flow [2023-08-27 07:35:25,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 1829 transitions, 48480 flow, removed 252 selfloop flow, removed 22 redundant places. [2023-08-27 07:35:25,603 INFO L231 Difference]: Finished difference. Result has 513 places, 1540 transitions, 40726 flow [2023-08-27 07:35:25,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=32278, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=40726, PETRI_PLACES=513, PETRI_TRANSITIONS=1540} [2023-08-27 07:35:25,605 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 493 predicate places. [2023-08-27 07:35:25,605 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1540 transitions, 40726 flow [2023-08-27 07:35:25,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 72.72727272727273) internal successors, (800), 11 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:25,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:25,605 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:25,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:25,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 07:35:25,811 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:35:25,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash 506092997, now seen corresponding path program 24 times [2023-08-27 07:35:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105606564] [2023-08-27 07:35:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:25,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:25,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:25,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105606564] [2023-08-27 07:35:25,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105606564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:25,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079042952] [2023-08-27 07:35:25,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:35:25,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:25,997 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:35:26,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 07:35:26,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 07:35:26,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:26,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:35:26,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:26,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:26,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079042952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:26,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:26,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-27 07:35:26,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280234031] [2023-08-27 07:35:26,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:26,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:35:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:26,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:35:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:35:26,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:35:26,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1540 transitions, 40726 flow. Second operand has 19 states, 19 states have (on average 62.63157894736842) internal successors, (1190), 19 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:26,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:26,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:35:26,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:31,757 INFO L124 PetriNetUnfolderBase]: 6664/10905 cut-off events. [2023-08-27 07:35:31,757 INFO L125 PetriNetUnfolderBase]: For 325569/325569 co-relation queries the response was YES. [2023-08-27 07:35:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135133 conditions, 10905 events. 6664/10905 cut-off events. For 325569/325569 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 76474 event pairs, 171 based on Foata normal form. 38/10943 useless extension candidates. Maximal degree in co-relation 134014. Up to 4694 conditions per place. [2023-08-27 07:35:32,193 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 1503 selfloop transitions, 1138 changer transitions 11/2652 dead transitions. [2023-08-27 07:35:32,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2652 transitions, 74538 flow [2023-08-27 07:35:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 07:35:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 07:35:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2049 transitions. [2023-08-27 07:35:32,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377269814142277 [2023-08-27 07:35:32,197 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2049 transitions. [2023-08-27 07:35:32,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2049 transitions. [2023-08-27 07:35:32,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:32,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2049 transitions. [2023-08-27 07:35:32,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 66.09677419354838) internal successors, (2049), 31 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:32,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 151.0) internal successors, (4832), 32 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:32,206 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 151.0) internal successors, (4832), 32 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:32,207 INFO L175 Difference]: Start difference. First operand has 513 places, 1540 transitions, 40726 flow. Second operand 31 states and 2049 transitions. [2023-08-27 07:35:32,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2652 transitions, 74538 flow [2023-08-27 07:35:38,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2652 transitions, 73501 flow, removed 514 selfloop flow, removed 2 redundant places. [2023-08-27 07:35:38,534 INFO L231 Difference]: Finished difference. Result has 551 places, 2189 transitions, 60724 flow [2023-08-27 07:35:38,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=40055, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=872, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=60724, PETRI_PLACES=551, PETRI_TRANSITIONS=2189} [2023-08-27 07:35:38,536 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 531 predicate places. [2023-08-27 07:35:38,536 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 2189 transitions, 60724 flow [2023-08-27 07:35:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.63157894736842) internal successors, (1190), 19 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:38,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:38,537 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:38,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:38,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 07:35:38,742 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:35:38,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1320590095, now seen corresponding path program 25 times [2023-08-27 07:35:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942874996] [2023-08-27 07:35:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:38,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942874996] [2023-08-27 07:35:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942874996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344208742] [2023-08-27 07:35:38,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:35:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:38,913 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:35:38,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 07:35:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:38,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:35:38,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:39,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:39,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344208742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:39,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:39,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-27 07:35:39,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497376556] [2023-08-27 07:35:39,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:39,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 07:35:39,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 07:35:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:35:39,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:35:39,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2189 transitions, 60724 flow. Second operand has 20 states, 20 states have (on average 62.55) internal successors, (1251), 20 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:39,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:39,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:35:39,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:35:47,430 INFO L124 PetriNetUnfolderBase]: 6945/11384 cut-off events. [2023-08-27 07:35:47,430 INFO L125 PetriNetUnfolderBase]: For 348063/348063 co-relation queries the response was YES. [2023-08-27 07:35:47,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144206 conditions, 11384 events. 6945/11384 cut-off events. For 348063/348063 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 81194 event pairs, 542 based on Foata normal form. 52/11436 useless extension candidates. Maximal degree in co-relation 143122. Up to 4670 conditions per place. [2023-08-27 07:35:47,621 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 1556 selfloop transitions, 1289 changer transitions 0/2845 dead transitions. [2023-08-27 07:35:47,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 2845 transitions, 82157 flow [2023-08-27 07:35:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-27 07:35:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-27 07:35:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4131 transitions. [2023-08-27 07:35:47,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43424787133396403 [2023-08-27 07:35:47,625 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4131 transitions. [2023-08-27 07:35:47,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4131 transitions. [2023-08-27 07:35:47,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:35:47,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4131 transitions. [2023-08-27 07:35:47,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 65.57142857142857) internal successors, (4131), 63 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:47,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 151.0) internal successors, (9664), 64 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:47,637 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 151.0) internal successors, (9664), 64 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:47,637 INFO L175 Difference]: Start difference. First operand has 551 places, 2189 transitions, 60724 flow. Second operand 63 states and 4131 transitions. [2023-08-27 07:35:47,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 2845 transitions, 82157 flow [2023-08-27 07:35:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 2845 transitions, 80385 flow, removed 768 selfloop flow, removed 11 redundant places. [2023-08-27 07:35:55,208 INFO L231 Difference]: Finished difference. Result has 615 places, 2340 transitions, 66652 flow [2023-08-27 07:35:55,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=59334, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=66652, PETRI_PLACES=615, PETRI_TRANSITIONS=2340} [2023-08-27 07:35:55,210 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 595 predicate places. [2023-08-27 07:35:55,210 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 2340 transitions, 66652 flow [2023-08-27 07:35:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.55) internal successors, (1251), 20 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:55,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:35:55,211 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:35:55,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 07:35:55,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:55,418 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:35:55,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:35:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2084293813, now seen corresponding path program 26 times [2023-08-27 07:35:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:35:55,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297405220] [2023-08-27 07:35:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:35:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:35:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:35:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:55,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:35:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297405220] [2023-08-27 07:35:55,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297405220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:35:55,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339289710] [2023-08-27 07:35:55,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:35:55,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:35:55,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:35:55,597 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:35:55,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 07:35:55,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:35:55,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:35:55,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:35:55,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:35:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:55,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:35:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:35:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339289710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:35:55,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:35:55,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-27 07:35:55,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732086286] [2023-08-27 07:35:55,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:35:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:35:55,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:35:55,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:35:55,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-27 07:35:55,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:35:55,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 2340 transitions, 66652 flow. Second operand has 23 states, 23 states have (on average 62.47826086956522) internal successors, (1437), 23 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:35:55,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:35:55,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:35:55,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:36:06,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:36:08,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:36:26,899 INFO L124 PetriNetUnfolderBase]: 7537/12212 cut-off events. [2023-08-27 07:36:26,899 INFO L125 PetriNetUnfolderBase]: For 369162/369162 co-relation queries the response was YES. [2023-08-27 07:36:27,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157236 conditions, 12212 events. 7537/12212 cut-off events. For 369162/369162 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 86647 event pairs, 719 based on Foata normal form. 48/12260 useless extension candidates. Maximal degree in co-relation 156714. Up to 5673 conditions per place. [2023-08-27 07:36:27,108 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 794 selfloop transitions, 2347 changer transitions 57/3198 dead transitions. [2023-08-27 07:36:27,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 3198 transitions, 95381 flow [2023-08-27 07:36:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-27 07:36:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-27 07:36:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4583 transitions. [2023-08-27 07:36:27,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335856196783349 [2023-08-27 07:36:27,113 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4583 transitions. [2023-08-27 07:36:27,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4583 transitions. [2023-08-27 07:36:27,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:36:27,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4583 transitions. [2023-08-27 07:36:27,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 65.47142857142858) internal successors, (4583), 70 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:27,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 151.0) internal successors, (10721), 71 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:27,124 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 151.0) internal successors, (10721), 71 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:27,124 INFO L175 Difference]: Start difference. First operand has 615 places, 2340 transitions, 66652 flow. Second operand 70 states and 4583 transitions. [2023-08-27 07:36:27,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 3198 transitions, 95381 flow [2023-08-27 07:36:34,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 3198 transitions, 93687 flow, removed 758 selfloop flow, removed 11 redundant places. [2023-08-27 07:36:34,683 INFO L231 Difference]: Finished difference. Result has 680 places, 2955 transitions, 88936 flow [2023-08-27 07:36:34,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=65204, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=88936, PETRI_PLACES=680, PETRI_TRANSITIONS=2955} [2023-08-27 07:36:34,685 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 660 predicate places. [2023-08-27 07:36:34,685 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 2955 transitions, 88936 flow [2023-08-27 07:36:34,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.47826086956522) internal successors, (1437), 23 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:34,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:36:34,685 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:36:34,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-27 07:36:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:36:34,886 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:36:34,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:36:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 868896345, now seen corresponding path program 27 times [2023-08-27 07:36:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:36:34,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973049557] [2023-08-27 07:36:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:36:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:36:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:36:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:36:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:36:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973049557] [2023-08-27 07:36:35,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973049557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:36:35,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184589533] [2023-08-27 07:36:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:36:35,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:36:35,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:36:35,053 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:36:35,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 07:36:35,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:36:35,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:36:35,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:36:35,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:36:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:36:35,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:36:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:36:35,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184589533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:36:35,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:36:35,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-27 07:36:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9635994] [2023-08-27 07:36:35,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:36:35,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:36:35,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:36:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:36:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:36:35,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:36:35,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 2955 transitions, 88936 flow. Second operand has 21 states, 21 states have (on average 62.714285714285715) internal successors, (1317), 21 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:35,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:36:35,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:36:35,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:36:59,328 INFO L124 PetriNetUnfolderBase]: 7873/12770 cut-off events. [2023-08-27 07:36:59,328 INFO L125 PetriNetUnfolderBase]: For 409593/409593 co-relation queries the response was YES. [2023-08-27 07:36:59,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169846 conditions, 12770 events. 7873/12770 cut-off events. For 409593/409593 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 91088 event pairs, 432 based on Foata normal form. 74/12844 useless extension candidates. Maximal degree in co-relation 169296. Up to 4324 conditions per place. [2023-08-27 07:36:59,579 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 1610 selfloop transitions, 1784 changer transitions 27/3421 dead transitions. [2023-08-27 07:36:59,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 3421 transitions, 105194 flow [2023-08-27 07:36:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-27 07:36:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-27 07:36:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4972 transitions. [2023-08-27 07:36:59,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43325200418264204 [2023-08-27 07:36:59,585 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4972 transitions. [2023-08-27 07:36:59,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4972 transitions. [2023-08-27 07:36:59,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:36:59,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4972 transitions. [2023-08-27 07:36:59,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 65.42105263157895) internal successors, (4972), 76 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:59,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 151.0) internal successors, (11627), 77 states have internal predecessors, (11627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:59,599 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 151.0) internal successors, (11627), 77 states have internal predecessors, (11627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:36:59,599 INFO L175 Difference]: Start difference. First operand has 680 places, 2955 transitions, 88936 flow. Second operand 76 states and 4972 transitions. [2023-08-27 07:36:59,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 3421 transitions, 105194 flow [2023-08-27 07:37:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 3421 transitions, 97130 flow, removed 3201 selfloop flow, removed 30 redundant places. [2023-08-27 07:37:11,066 INFO L231 Difference]: Finished difference. Result has 743 places, 3147 transitions, 91645 flow [2023-08-27 07:37:11,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=81759, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=91645, PETRI_PLACES=743, PETRI_TRANSITIONS=3147} [2023-08-27 07:37:11,069 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 723 predicate places. [2023-08-27 07:37:11,069 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 3147 transitions, 91645 flow [2023-08-27 07:37:11,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.714285714285715) internal successors, (1317), 21 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:11,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:37:11,069 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:37:11,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 07:37:11,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-27 07:37:11,273 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:37:11,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:37:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash 330494677, now seen corresponding path program 28 times [2023-08-27 07:37:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:37:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546666791] [2023-08-27 07:37:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:37:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:37:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:37:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:37:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:37:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546666791] [2023-08-27 07:37:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546666791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:37:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618989053] [2023-08-27 07:37:11,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:37:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:37:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:37:11,441 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:37:11,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 07:37:11,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:37:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:37:11,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:37:11,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:37:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:37:11,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:37:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:37:11,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618989053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:37:11,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:37:11,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-27 07:37:11,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535044357] [2023-08-27 07:37:11,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:37:11,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:37:11,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:37:11,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:37:11,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-27 07:37:11,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:37:11,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 3147 transitions, 91645 flow. Second operand has 23 states, 23 states have (on average 62.65217391304348) internal successors, (1441), 23 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:37:11,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:37:11,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:37:11,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:37:20,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:37:22,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:38:07,687 INFO L124 PetriNetUnfolderBase]: 8410/13581 cut-off events. [2023-08-27 07:38:07,687 INFO L125 PetriNetUnfolderBase]: For 392706/392706 co-relation queries the response was YES. [2023-08-27 07:38:07,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171605 conditions, 13581 events. 8410/13581 cut-off events. For 392706/392706 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 96626 event pairs, 384 based on Foata normal form. 104/13685 useless extension candidates. Maximal degree in co-relation 170998. Up to 4384 conditions per place. [2023-08-27 07:38:08,065 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 634 selfloop transitions, 3028 changer transitions 10/3672 dead transitions. [2023-08-27 07:38:08,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 842 places, 3672 transitions, 109091 flow [2023-08-27 07:38:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-27 07:38:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-27 07:38:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 6551 transitions. [2023-08-27 07:38:08,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433841059602649 [2023-08-27 07:38:08,074 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 6551 transitions. [2023-08-27 07:38:08,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 6551 transitions. [2023-08-27 07:38:08,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:08,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 6551 transitions. [2023-08-27 07:38:08,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 65.51) internal successors, (6551), 100 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:08,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 151.0) internal successors, (15251), 101 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:08,109 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 151.0) internal successors, (15251), 101 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:08,109 INFO L175 Difference]: Start difference. First operand has 743 places, 3147 transitions, 91645 flow. Second operand 100 states and 6551 transitions. [2023-08-27 07:38:08,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 842 places, 3672 transitions, 109091 flow [2023-08-27 07:38:19,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 818 places, 3672 transitions, 106847 flow, removed 890 selfloop flow, removed 24 redundant places. [2023-08-27 07:38:19,156 INFO L231 Difference]: Finished difference. Result has 822 places, 3436 transitions, 104156 flow [2023-08-27 07:38:19,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=89333, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2735, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=104156, PETRI_PLACES=822, PETRI_TRANSITIONS=3436} [2023-08-27 07:38:19,159 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 802 predicate places. [2023-08-27 07:38:19,159 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 3436 transitions, 104156 flow [2023-08-27 07:38:19,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.65217391304348) internal successors, (1441), 23 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:19,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:19,159 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:19,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:19,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:19,360 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:38:19,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash -727586263, now seen corresponding path program 29 times [2023-08-27 07:38:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:19,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246209607] [2023-08-27 07:38:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:19,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:19,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246209607] [2023-08-27 07:38:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246209607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822203232] [2023-08-27 07:38:19,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:38:19,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:19,521 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 07:38:19,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 07:38:19,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:38:19,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:38:19,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:19,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:38:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822203232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:38:19,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:38:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-27 07:38:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098270685] [2023-08-27 07:38:19,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:38:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 07:38:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 07:38:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-08-27 07:38:19,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:38:19,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 3436 transitions, 104156 flow. Second operand has 22 states, 22 states have (on average 62.68181818181818) internal successors, (1379), 22 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:19,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:19,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:38:19,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:38:40,756 INFO L124 PetriNetUnfolderBase]: 9572/15343 cut-off events. [2023-08-27 07:38:40,756 INFO L125 PetriNetUnfolderBase]: For 462868/462868 co-relation queries the response was YES. [2023-08-27 07:38:40,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203971 conditions, 15343 events. 9572/15343 cut-off events. For 462868/462868 co-relation queries the response was YES. Maximal size of possible extension queue 1079. Compared 110024 event pairs, 377 based on Foata normal form. 162/15505 useless extension candidates. Maximal degree in co-relation 203326. Up to 4537 conditions per place. [2023-08-27 07:38:41,034 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 1464 selfloop transitions, 2742 changer transitions 58/4264 dead transitions. [2023-08-27 07:38:41,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 902 places, 4264 transitions, 133914 flow [2023-08-27 07:38:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-27 07:38:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-27 07:38:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5304 transitions. [2023-08-27 07:38:41,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336521952415992 [2023-08-27 07:38:41,038 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5304 transitions. [2023-08-27 07:38:41,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5304 transitions. [2023-08-27 07:38:41,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:38:41,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5304 transitions. [2023-08-27 07:38:41,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 65.48148148148148) internal successors, (5304), 81 states have internal predecessors, (5304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:41,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 151.0) internal successors, (12382), 82 states have internal predecessors, (12382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:41,048 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 151.0) internal successors, (12382), 82 states have internal predecessors, (12382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:41,048 INFO L175 Difference]: Start difference. First operand has 822 places, 3436 transitions, 104156 flow. Second operand 81 states and 5304 transitions. [2023-08-27 07:38:41,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 902 places, 4264 transitions, 133914 flow [2023-08-27 07:38:55,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 4264 transitions, 131462 flow, removed 844 selfloop flow, removed 40 redundant places. [2023-08-27 07:38:55,850 INFO L231 Difference]: Finished difference. Result has 892 places, 3965 transitions, 126534 flow [2023-08-27 07:38:55,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=101726, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=126534, PETRI_PLACES=892, PETRI_TRANSITIONS=3965} [2023-08-27 07:38:55,853 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 872 predicate places. [2023-08-27 07:38:55,853 INFO L495 AbstractCegarLoop]: Abstraction has has 892 places, 3965 transitions, 126534 flow [2023-08-27 07:38:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.68181818181818) internal successors, (1379), 22 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:55,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:38:55,853 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:38:55,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 07:38:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:56,059 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:38:56,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:38:56,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1496882121, now seen corresponding path program 30 times [2023-08-27 07:38:56,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:38:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997140211] [2023-08-27 07:38:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:38:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:38:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:38:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:38:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997140211] [2023-08-27 07:38:56,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997140211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:38:56,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154761527] [2023-08-27 07:38:56,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:38:56,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:38:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:38:56,245 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:38:56,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 07:38:56,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 07:38:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:38:56,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:38:56,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:38:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:56,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:38:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:38:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154761527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:38:56,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:38:56,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-27 07:38:56,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838588126] [2023-08-27 07:38:56,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:38:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 07:38:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:38:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 07:38:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:38:56,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:38:56,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 892 places, 3965 transitions, 126534 flow. Second operand has 20 states, 20 states have (on average 62.75) internal successors, (1255), 20 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:38:56,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:38:56,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:38:56,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:39:19,544 INFO L124 PetriNetUnfolderBase]: 10799/17512 cut-off events. [2023-08-27 07:39:19,545 INFO L125 PetriNetUnfolderBase]: For 612072/612072 co-relation queries the response was YES. [2023-08-27 07:39:20,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242797 conditions, 17512 events. 10799/17512 cut-off events. For 612072/612072 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 130233 event pairs, 1819 based on Foata normal form. 38/17550 useless extension candidates. Maximal degree in co-relation 242164. Up to 12665 conditions per place. [2023-08-27 07:39:20,249 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 3572 selfloop transitions, 1205 changer transitions 0/4777 dead transitions. [2023-08-27 07:39:20,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 977 places, 4777 transitions, 158087 flow [2023-08-27 07:39:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-27 07:39:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-27 07:39:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 5637 transitions. [2023-08-27 07:39:20,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43408285846296013 [2023-08-27 07:39:20,253 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 5637 transitions. [2023-08-27 07:39:20,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 5637 transitions. [2023-08-27 07:39:20,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:39:20,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 5637 transitions. [2023-08-27 07:39:20,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 65.54651162790698) internal successors, (5637), 86 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:20,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 151.0) internal successors, (13137), 87 states have internal predecessors, (13137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:20,263 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 151.0) internal successors, (13137), 87 states have internal predecessors, (13137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:20,263 INFO L175 Difference]: Start difference. First operand has 892 places, 3965 transitions, 126534 flow. Second operand 86 states and 5637 transitions. [2023-08-27 07:39:20,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 977 places, 4777 transitions, 158087 flow [2023-08-27 07:39:41,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 949 places, 4777 transitions, 153697 flow, removed 2017 selfloop flow, removed 28 redundant places. [2023-08-27 07:39:41,888 INFO L231 Difference]: Finished difference. Result has 969 places, 4345 transitions, 138472 flow [2023-08-27 07:39:41,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=122683, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=138472, PETRI_PLACES=969, PETRI_TRANSITIONS=4345} [2023-08-27 07:39:41,891 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 949 predicate places. [2023-08-27 07:39:41,891 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 4345 transitions, 138472 flow [2023-08-27 07:39:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.75) internal successors, (1255), 20 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:41,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:39:41,891 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:39:41,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 07:39:42,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 07:39:42,092 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:39:42,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:39:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -939083319, now seen corresponding path program 31 times [2023-08-27 07:39:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:39:42,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174637607] [2023-08-27 07:39:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:39:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:39:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:39:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:39:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174637607] [2023-08-27 07:39:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174637607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:39:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720148473] [2023-08-27 07:39:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:39:42,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:39:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:39:42,237 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:39:42,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 07:39:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:39:42,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:39:42,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:39:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:39:42,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:39:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:39:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720148473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:39:42,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:39:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2023-08-27 07:39:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710576123] [2023-08-27 07:39:42,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:39:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 07:39:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:39:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 07:39:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-27 07:39:42,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:39:42,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 4345 transitions, 138472 flow. Second operand has 22 states, 22 states have (on average 62.54545454545455) internal successors, (1376), 22 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:39:42,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:39:42,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:39:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:39:48,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:40:16,153 INFO L124 PetriNetUnfolderBase]: 12742/20859 cut-off events. [2023-08-27 07:40:16,154 INFO L125 PetriNetUnfolderBase]: For 802163/802163 co-relation queries the response was YES. [2023-08-27 07:40:16,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291114 conditions, 20859 events. 12742/20859 cut-off events. For 802163/802163 co-relation queries the response was YES. Maximal size of possible extension queue 1431. Compared 162226 event pairs, 1643 based on Foata normal form. 142/21001 useless extension candidates. Maximal degree in co-relation 290462. Up to 12307 conditions per place. [2023-08-27 07:40:16,888 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 2876 selfloop transitions, 2391 changer transitions 80/5347 dead transitions. [2023-08-27 07:40:16,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 5347 transitions, 180305 flow [2023-08-27 07:40:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-27 07:40:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-27 07:40:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4362 transitions. [2023-08-27 07:40:16,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311554808737768 [2023-08-27 07:40:16,894 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4362 transitions. [2023-08-27 07:40:16,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4362 transitions. [2023-08-27 07:40:16,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:40:16,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4362 transitions. [2023-08-27 07:40:16,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 65.1044776119403) internal successors, (4362), 67 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:16,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 151.0) internal successors, (10268), 68 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:16,907 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 151.0) internal successors, (10268), 68 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:16,907 INFO L175 Difference]: Start difference. First operand has 969 places, 4345 transitions, 138472 flow. Second operand 67 states and 4362 transitions. [2023-08-27 07:40:16,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 5347 transitions, 180305 flow [2023-08-27 07:40:49,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1006 places, 5347 transitions, 177968 flow, removed 898 selfloop flow, removed 29 redundant places. [2023-08-27 07:40:49,648 INFO L231 Difference]: Finished difference. Result has 1025 places, 4936 transitions, 165261 flow [2023-08-27 07:40:49,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=135557, PETRI_DIFFERENCE_MINUEND_PLACES=940, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1820, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=165261, PETRI_PLACES=1025, PETRI_TRANSITIONS=4936} [2023-08-27 07:40:49,651 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1005 predicate places. [2023-08-27 07:40:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 1025 places, 4936 transitions, 165261 flow [2023-08-27 07:40:49,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.54545454545455) internal successors, (1376), 22 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:49,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:40:49,652 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:40:49,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 07:40:49,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 07:40:49,852 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:40:49,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:40:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash -158599851, now seen corresponding path program 32 times [2023-08-27 07:40:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:40:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648921508] [2023-08-27 07:40:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:40:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:40:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:40:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:40:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:40:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648921508] [2023-08-27 07:40:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648921508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:40:50,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185974952] [2023-08-27 07:40:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:40:50,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:40:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:40:50,008 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:40:50,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 07:40:50,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:40:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:40:50,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:40:50,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:40:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:40:50,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:40:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:40:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185974952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:40:50,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:40:50,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-27 07:40:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932836645] [2023-08-27 07:40:50,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:40:50,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 07:40:50,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:40:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 07:40:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-08-27 07:40:50,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:40:50,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1025 places, 4936 transitions, 165261 flow. Second operand has 22 states, 22 states have (on average 62.68181818181818) internal successors, (1379), 22 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:40:50,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:40:50,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:40:50,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:41:31,663 INFO L124 PetriNetUnfolderBase]: 13706/22519 cut-off events. [2023-08-27 07:41:31,663 INFO L125 PetriNetUnfolderBase]: For 930159/930159 co-relation queries the response was YES. [2023-08-27 07:41:32,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324055 conditions, 22519 events. 13706/22519 cut-off events. For 930159/930159 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 178126 event pairs, 2113 based on Foata normal form. 68/22587 useless extension candidates. Maximal degree in co-relation 323390. Up to 15443 conditions per place. [2023-08-27 07:41:32,397 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 3974 selfloop transitions, 1744 changer transitions 37/5755 dead transitions. [2023-08-27 07:41:32,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1112 places, 5755 transitions, 200485 flow [2023-08-27 07:41:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-27 07:41:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-27 07:41:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5744 transitions. [2023-08-27 07:41:32,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43226971703792894 [2023-08-27 07:41:32,402 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5744 transitions. [2023-08-27 07:41:32,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5744 transitions. [2023-08-27 07:41:32,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:41:32,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5744 transitions. [2023-08-27 07:41:32,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 65.27272727272727) internal successors, (5744), 88 states have internal predecessors, (5744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:32,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 151.0) internal successors, (13439), 89 states have internal predecessors, (13439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:32,416 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 151.0) internal successors, (13439), 89 states have internal predecessors, (13439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:41:32,416 INFO L175 Difference]: Start difference. First operand has 1025 places, 4936 transitions, 165261 flow. Second operand 88 states and 5744 transitions. [2023-08-27 07:41:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1112 places, 5755 transitions, 200485 flow [2023-08-27 07:42:16,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1081 places, 5755 transitions, 198339 flow, removed 872 selfloop flow, removed 31 redundant places. [2023-08-27 07:42:16,179 INFO L231 Difference]: Finished difference. Result has 1099 places, 5239 transitions, 179349 flow [2023-08-27 07:42:16,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=163063, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=179349, PETRI_PLACES=1099, PETRI_TRANSITIONS=5239} [2023-08-27 07:42:16,184 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1079 predicate places. [2023-08-27 07:42:16,184 INFO L495 AbstractCegarLoop]: Abstraction has has 1099 places, 5239 transitions, 179349 flow [2023-08-27 07:42:16,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.68181818181818) internal successors, (1379), 22 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:16,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:42:16,184 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:42:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 07:42:16,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-27 07:42:16,389 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:42:16,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:42:16,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1365162453, now seen corresponding path program 33 times [2023-08-27 07:42:16,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:42:16,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070650326] [2023-08-27 07:42:16,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:42:16,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:42:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:42:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:42:16,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:42:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070650326] [2023-08-27 07:42:16,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070650326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:42:16,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857103153] [2023-08-27 07:42:16,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:42:16,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:42:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:42:16,553 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:42:16,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 07:42:16,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:42:16,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:42:16,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:42:16,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:42:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:42:16,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:42:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:42:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857103153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:42:16,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:42:16,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-27 07:42:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247188659] [2023-08-27 07:42:16,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:42:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 07:42:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:42:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 07:42:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-08-27 07:42:16,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:42:16,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1099 places, 5239 transitions, 179349 flow. Second operand has 23 states, 23 states have (on average 62.65217391304348) internal successors, (1441), 23 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:42:16,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:42:16,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:42:16,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:42:20,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:43:04,635 INFO L124 PetriNetUnfolderBase]: 16140/26597 cut-off events. [2023-08-27 07:43:04,635 INFO L125 PetriNetUnfolderBase]: For 1192444/1192444 co-relation queries the response was YES. [2023-08-27 07:43:05,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393381 conditions, 26597 events. 16140/26597 cut-off events. For 1192444/1192444 co-relation queries the response was YES. Maximal size of possible extension queue 1779. Compared 214337 event pairs, 2444 based on Foata normal form. 184/26781 useless extension candidates. Maximal degree in co-relation 392692. Up to 16434 conditions per place. [2023-08-27 07:43:05,943 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 4232 selfloop transitions, 2162 changer transitions 133/6527 dead transitions. [2023-08-27 07:43:05,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1173 places, 6527 transitions, 235094 flow [2023-08-27 07:43:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-27 07:43:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-27 07:43:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4889 transitions. [2023-08-27 07:43:05,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43169977924944813 [2023-08-27 07:43:05,947 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4889 transitions. [2023-08-27 07:43:05,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4889 transitions. [2023-08-27 07:43:05,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:43:05,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4889 transitions. [2023-08-27 07:43:05,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 65.18666666666667) internal successors, (4889), 75 states have internal predecessors, (4889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:05,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:05,955 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:43:05,955 INFO L175 Difference]: Start difference. First operand has 1099 places, 5239 transitions, 179349 flow. Second operand 75 states and 4889 transitions. [2023-08-27 07:43:05,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1173 places, 6527 transitions, 235094 flow [2023-08-27 07:44:10,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1133 places, 6527 transitions, 232909 flow, removed 894 selfloop flow, removed 40 redundant places. [2023-08-27 07:44:10,564 INFO L231 Difference]: Finished difference. Result has 1165 places, 5911 transitions, 210406 flow [2023-08-27 07:44:10,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=177089, PETRI_DIFFERENCE_MINUEND_PLACES=1059, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=210406, PETRI_PLACES=1165, PETRI_TRANSITIONS=5911} [2023-08-27 07:44:10,569 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1145 predicate places. [2023-08-27 07:44:10,569 INFO L495 AbstractCegarLoop]: Abstraction has has 1165 places, 5911 transitions, 210406 flow [2023-08-27 07:44:10,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.65217391304348) internal successors, (1441), 23 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:10,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:44:10,570 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:44:10,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 07:44:10,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:44:10,775 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:44:10,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:44:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 550462165, now seen corresponding path program 34 times [2023-08-27 07:44:10,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:44:10,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747973734] [2023-08-27 07:44:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:44:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:44:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:44:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:44:10,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:44:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747973734] [2023-08-27 07:44:10,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747973734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:44:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492650125] [2023-08-27 07:44:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:44:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:44:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:44:10,952 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:44:10,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 07:44:11,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:44:11,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:44:11,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:44:11,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:44:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:44:11,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:44:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:44:11,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492650125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:44:11,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:44:11,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-27 07:44:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423835193] [2023-08-27 07:44:11,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:44:11,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:44:11,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:44:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:44:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:44:11,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:44:11,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1165 places, 5911 transitions, 210406 flow. Second operand has 21 states, 21 states have (on average 62.714285714285715) internal successors, (1317), 21 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:44:11,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:44:11,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:44:11,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:44:14,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:44:20,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 07:45:19,373 INFO L124 PetriNetUnfolderBase]: 16376/27151 cut-off events. [2023-08-27 07:45:19,373 INFO L125 PetriNetUnfolderBase]: For 1276427/1276427 co-relation queries the response was YES. [2023-08-27 07:45:21,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413210 conditions, 27151 events. 16376/27151 cut-off events. For 1276427/1276427 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 221112 event pairs, 3654 based on Foata normal form. 48/27199 useless extension candidates. Maximal degree in co-relation 412484. Up to 22456 conditions per place. [2023-08-27 07:45:21,499 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 5170 selfloop transitions, 1082 changer transitions 59/6311 dead transitions. [2023-08-27 07:45:21,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1228 places, 6311 transitions, 234214 flow [2023-08-27 07:45:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-27 07:45:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-27 07:45:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4180 transitions. [2023-08-27 07:45:21,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253311258278143 [2023-08-27 07:45:21,502 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4180 transitions. [2023-08-27 07:45:21,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4180 transitions. [2023-08-27 07:45:21,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:45:21,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4180 transitions. [2023-08-27 07:45:21,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 65.3125) internal successors, (4180), 64 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:45:21,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:45:21,512 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:45:21,512 INFO L175 Difference]: Start difference. First operand has 1165 places, 5911 transitions, 210406 flow. Second operand 64 states and 4180 transitions. [2023-08-27 07:45:21,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1228 places, 6311 transitions, 234214 flow [2023-08-27 07:46:34,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1197 places, 6311 transitions, 230877 flow, removed 1471 selfloop flow, removed 31 redundant places. [2023-08-27 07:46:35,113 INFO L231 Difference]: Finished difference. Result has 1216 places, 6069 transitions, 216925 flow [2023-08-27 07:46:35,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=206901, PETRI_DIFFERENCE_MINUEND_PLACES=1134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4892, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=216925, PETRI_PLACES=1216, PETRI_TRANSITIONS=6069} [2023-08-27 07:46:35,119 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1196 predicate places. [2023-08-27 07:46:35,119 INFO L495 AbstractCegarLoop]: Abstraction has has 1216 places, 6069 transitions, 216925 flow [2023-08-27 07:46:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.714285714285715) internal successors, (1317), 21 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:46:35,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:46:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:46:35,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 07:46:35,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 07:46:35,324 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 07:46:35,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:46:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1641927977, now seen corresponding path program 35 times [2023-08-27 07:46:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:46:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520780107] [2023-08-27 07:46:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:46:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:46:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:46:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:46:35,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:46:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520780107] [2023-08-27 07:46:35,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520780107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:46:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869855257] [2023-08-27 07:46:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:46:35,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:46:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:46:35,498 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:46:35,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 07:46:35,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:46:35,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:46:35,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 07:46:35,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:46:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:46:35,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:46:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:46:35,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869855257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:46:35,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:46:35,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-08-27 07:46:35,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628370037] [2023-08-27 07:46:35,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:46:35,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 07:46:35,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:46:35,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 07:46:35,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:46:35,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-08-27 07:46:35,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1216 places, 6069 transitions, 216925 flow. Second operand has 20 states, 20 states have (on average 62.75) internal successors, (1255), 20 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:46:35,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:46:35,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-08-27 07:46:35,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:47:31,610 INFO L124 PetriNetUnfolderBase]: 17706/29485 cut-off events. [2023-08-27 07:47:31,610 INFO L125 PetriNetUnfolderBase]: For 1418531/1418531 co-relation queries the response was YES. [2023-08-27 07:47:32,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452327 conditions, 29485 events. 17706/29485 cut-off events. For 1418531/1418531 co-relation queries the response was YES. Maximal size of possible extension queue 1989. Compared 244444 event pairs, 4038 based on Foata normal form. 46/29531 useless extension candidates. Maximal degree in co-relation 451586. Up to 24610 conditions per place. [2023-08-27 07:47:33,157 INFO L140 encePairwiseOnDemand]: 145/151 looper letters, 5867 selfloop transitions, 970 changer transitions 11/6848 dead transitions. [2023-08-27 07:47:33,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1284 places, 6848 transitions, 257600 flow [2023-08-27 07:47:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-27 07:47:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-27 07:47:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4523 transitions. [2023-08-27 07:47:33,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43411075918994146 [2023-08-27 07:47:33,160 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4523 transitions. [2023-08-27 07:47:33,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4523 transitions. [2023-08-27 07:47:33,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:47:33,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4523 transitions. [2023-08-27 07:47:33,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 65.55072463768116) internal successors, (4523), 69 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:47:33,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 151.0) internal successors, (10570), 70 states have internal predecessors, (10570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:47:33,168 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 151.0) internal successors, (10570), 70 states have internal predecessors, (10570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:47:33,168 INFO L175 Difference]: Start difference. First operand has 1216 places, 6069 transitions, 216925 flow. Second operand 69 states and 4523 transitions. [2023-08-27 07:47:33,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1284 places, 6848 transitions, 257600 flow Received shutdown request... [2023-08-27 07:47:43,044 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 [2023-08-27 07:47:43,044 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 07:47:43,075 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2023-08-27 07:47:43,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 07:47:43,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 07:47:43,276 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 07:47:43,277 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-27 07:47:43,278 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-27 07:47:43,278 INFO L445 BasicCegarLoop]: Path program histogram: [35, 4, 1] [2023-08-27 07:47:43,281 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 07:47:43,281 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 07:47:43,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:47:43 BasicIcfg [2023-08-27 07:47:43,283 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 07:47:43,283 INFO L158 Benchmark]: Toolchain (without parser) took 816640.29ms. Allocated memory was 341.8MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 318.3MB in the beginning and 4.3GB in the end (delta: -3.9GB). Peak memory consumption was 4.0GB. Max. memory is 16.0GB. [2023-08-27 07:47:43,283 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 341.8MB. Free memory is still 318.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 07:47:43,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.41ms. Allocated memory is still 341.8MB. Free memory was 318.3MB in the beginning and 307.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 07:47:43,284 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.42ms. Allocated memory is still 341.8MB. Free memory was 307.6MB in the beginning and 306.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 07:47:43,284 INFO L158 Benchmark]: Boogie Preprocessor took 33.01ms. Allocated memory is still 341.8MB. Free memory was 306.0MB in the beginning and 304.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 07:47:43,284 INFO L158 Benchmark]: RCFGBuilder took 448.02ms. Allocated memory is still 341.8MB. Free memory was 304.4MB in the beginning and 290.3MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 07:47:43,284 INFO L158 Benchmark]: TraceAbstraction took 815867.76ms. Allocated memory was 341.8MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 289.7MB in the beginning and 4.3GB in the end (delta: -4.0GB). Peak memory consumption was 3.9GB. Max. memory is 16.0GB. [2023-08-27 07:47:43,285 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 341.8MB. Free memory is still 318.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 247.41ms. Allocated memory is still 341.8MB. Free memory was 318.3MB in the beginning and 307.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.42ms. Allocated memory is still 341.8MB. Free memory was 307.6MB in the beginning and 306.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.01ms. Allocated memory is still 341.8MB. Free memory was 306.0MB in the beginning and 304.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 448.02ms. Allocated memory is still 341.8MB. Free memory was 304.4MB in the beginning and 290.3MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 815867.76ms. Allocated memory was 341.8MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 289.7MB in the beginning and 4.3GB in the end (delta: -4.0GB). Peak memory consumption was 3.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 595 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 566, independent: 562, independent conditional: 0, independent unconditional: 562, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 311, independent: 309, independent conditional: 0, independent unconditional: 309, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 566, independent: 253, independent conditional: 0, independent unconditional: 253, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 311, unknown conditional: 0, unknown unconditional: 311] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: 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: 70]: 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, 102 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: 815.7s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 788.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 4438 SdHoareTripleChecker+Valid, 41.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4438 mSDsluCounter, 679 SdHoareTripleChecker+Invalid, 39.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 518 mSDsCounter, 1086 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26005 IncrementalHoareTripleChecker+Invalid, 27095 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1086 mSolverCounterUnsat, 161 mSDtfsCounter, 26005 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2884 GetRequests, 1184 SyntacticMatches, 72 SemanticMatches, 1628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31219 ImplicationChecksByTransitivity, 123.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=216925occurred in iteration=39, InterpolantAutomatonStates: 1433, 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, 1.6s SatisfiabilityAnalysisTime, 12.9s InterpolantComputationTime, 1385 NumberOfCodeBlocks, 1363 NumberOfCodeBlocksAsserted, 129 NumberOfCheckSat, 1948 ConstructedInterpolants, 0 QuantifiedInterpolants, 12910 SizeOfPredicates, 58 NumberOfNonLiveVariables, 5242 ConjunctsInSsa, 540 ConjunctsInUnsatCore, 116 InterpolantComputations, 3 PerfectInterpolantSequences, 136/1081 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