/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 12:08:53,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 12:08:53,053 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 12:08:53,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 12:08:53,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 12:08:53,071 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 12:08:53,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 12:08:53,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 12:08:53,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 12:08:53,072 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 12:08:53,073 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 12:08:53,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 12:08:53,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 12:08:53,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 12:08:53,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 12:08:53,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 12:08:53,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 12:08:53,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 12:08:53,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 12:08:53,075 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 12:08:53,075 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 12:08:53,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 12:08:53,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 12:08:53,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 12:08:53,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 12:08:53,076 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 12:08:53,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 12:08:53,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 12:08:53,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 12:08:53,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 12:08:53,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 12:08:53,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 12:08:53,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 12:08:53,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 12:08:53,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 12:08:53,078 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 12:08:53,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 12:08:53,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 12:08:53,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 12:08:53,407 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 12:08:53,408 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 12:08:53,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-27 12:08:54,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 12:08:54,681 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 12:08:54,682 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2023-08-27 12:08:54,689 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b1614f95/104f02b75c864ef8841ff64fe91a33f9/FLAG47bdbb71b [2023-08-27 12:08:54,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b1614f95/104f02b75c864ef8841ff64fe91a33f9 [2023-08-27 12:08:54,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 12:08:54,708 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 12:08:54,710 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 12:08:54,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 12:08:54,712 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 12:08:54,714 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,714 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b4f8c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54, skipping insertion in model container [2023-08-27 12:08:54,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,733 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 12:08:54,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 12:08:54,903 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 12:08:54,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 12:08:54,942 INFO L206 MainTranslator]: Completed translation [2023-08-27 12:08:54,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54 WrapperNode [2023-08-27 12:08:54,944 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 12:08:54,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 12:08:54,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 12:08:54,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 12:08:54,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,984 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 124 [2023-08-27 12:08:54,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 12:08:54,986 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 12:08:54,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 12:08:54,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 12:08:54,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:54,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:55,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:55,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:55,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:55,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:55,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 12:08:55,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 12:08:55,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 12:08:55,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 12:08:55,012 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (1/1) ... [2023-08-27 12:08:55,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 12:08:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:08:55,040 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 12:08:55,042 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 12:08:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 12:08:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 12:08:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 12:08:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 12:08:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 12:08:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 12:08:55,086 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 12:08:55,164 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 12:08:55,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 12:08:55,460 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 12:08:55,466 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 12:08:55,466 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 12:08:55,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 12:08:55 BoogieIcfgContainer [2023-08-27 12:08:55,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 12:08:55,470 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 12:08:55,470 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 12:08:55,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 12:08:55,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 12:08:54" (1/3) ... [2023-08-27 12:08:55,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688e0515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 12:08:55, skipping insertion in model container [2023-08-27 12:08:55,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 12:08:54" (2/3) ... [2023-08-27 12:08:55,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688e0515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 12:08:55, skipping insertion in model container [2023-08-27 12:08:55,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 12:08:55" (3/3) ... [2023-08-27 12:08:55,478 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2023-08-27 12:08:55,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 12:08:55,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 12:08:55,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 12:08:55,559 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 12:08:55,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 182 transitions, 380 flow [2023-08-27 12:08:55,671 INFO L124 PetriNetUnfolderBase]: 15/180 cut-off events. [2023-08-27 12:08:55,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 12:08:55,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 180 events. 15/180 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 172 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 136. Up to 3 conditions per place. [2023-08-27 12:08:55,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 182 transitions, 380 flow [2023-08-27 12:08:55,684 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 171 transitions, 354 flow [2023-08-27 12:08:55,689 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 12:08:55,700 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 171 transitions, 354 flow [2023-08-27 12:08:55,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 171 transitions, 354 flow [2023-08-27 12:08:55,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 171 transitions, 354 flow [2023-08-27 12:08:55,745 INFO L124 PetriNetUnfolderBase]: 15/171 cut-off events. [2023-08-27 12:08:55,746 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 12:08:55,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 171 events. 15/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 136. Up to 3 conditions per place. [2023-08-27 12:08:55,748 INFO L119 LiptonReduction]: Number of co-enabled transitions 1400 [2023-08-27 12:09:00,126 INFO L134 LiptonReduction]: Checked pairs total: 2014 [2023-08-27 12:09:00,126 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-27 12:09:00,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 12:09:00,151 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;@49478f16, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 12:09:00,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-27 12:09:00,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 12:09:00,162 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 12:09:00,162 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 12:09:00,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:00,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 12:09:00,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:00,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash 22194, now seen corresponding path program 1 times [2023-08-27 12:09:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:00,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11186594] [2023-08-27 12:09:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:00,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:00,379 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 12:09:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11186594] [2023-08-27 12:09:00,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11186594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:00,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:00,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 12:09:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030735666] [2023-08-27 12:09:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:00,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 12:09:00,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 12:09:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 12:09:00,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 374 [2023-08-27 12:09:00,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 12:09:00,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:00,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 374 [2023-08-27 12:09:00,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:00,460 INFO L124 PetriNetUnfolderBase]: 93/162 cut-off events. [2023-08-27 12:09:00,460 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-27 12:09:00,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 93/162 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 425 event pairs, 57 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 270. Up to 160 conditions per place. [2023-08-27 12:09:00,462 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 26 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-27 12:09:00,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 136 flow [2023-08-27 12:09:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-27 12:09:00,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376114081996435 [2023-08-27 12:09:00,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-27 12:09:00,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-27 12:09:00,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:00,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-27 12:09:00,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states 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 12:09:00,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:00,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:00,484 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 66 flow. Second operand 3 states and 491 transitions. [2023-08-27 12:09:00,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 136 flow [2023-08-27 12:09:00,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 12:09:00,487 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 102 flow [2023-08-27 12:09:00,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-08-27 12:09:00,491 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-27 12:09:00,491 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 102 flow [2023-08-27 12:09:00,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 12:09:00,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:00,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 12:09:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 12:09:00,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:00,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash 688880, now seen corresponding path program 1 times [2023-08-27 12:09:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:00,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484518572] [2023-08-27 12:09:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:00,563 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 12:09:00,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:00,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484518572] [2023-08-27 12:09:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484518572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:00,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103999246] [2023-08-27 12:09:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:00,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:00,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:00,566 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 12:09:00,585 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 12:09:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:00,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 12:09:00,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:00,666 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 12:09:00,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 12:09:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103999246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:00,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 12:09:00,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 12:09:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900608381] [2023-08-27 12:09:00,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 12:09:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 12:09:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 12:09:00,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 374 [2023-08-27 12:09:00,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 12:09:00,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:00,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 374 [2023-08-27 12:09:00,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:00,717 INFO L124 PetriNetUnfolderBase]: 93/160 cut-off events. [2023-08-27 12:09:00,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 12:09:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 160 events. 93/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 428 event pairs, 57 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 304. Up to 152 conditions per place. [2023-08-27 12:09:00,719 INFO L140 encePairwiseOnDemand]: 367/374 looper letters, 23 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2023-08-27 12:09:00,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 152 flow [2023-08-27 12:09:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 12:09:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 12:09:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 639 transitions. [2023-08-27 12:09:00,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42713903743315507 [2023-08-27 12:09:00,721 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 639 transitions. [2023-08-27 12:09:00,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 639 transitions. [2023-08-27 12:09:00,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:00,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 639 transitions. [2023-08-27 12:09:00,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 0 states have call successors, (0), 0 states 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 12:09:00,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 12:09:00,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 12:09:00,726 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 102 flow. Second operand 4 states and 639 transitions. [2023-08-27 12:09:00,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 152 flow [2023-08-27 12:09:00,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 12:09:00,727 INFO L231 Difference]: Finished difference. Result has 28 places, 29 transitions, 96 flow [2023-08-27 12:09:00,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=28, PETRI_TRANSITIONS=29} [2023-08-27 12:09:00,728 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2023-08-27 12:09:00,728 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 29 transitions, 96 flow [2023-08-27 12:09:00,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 12:09:00,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:00,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 12:09:00,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 12:09:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:00,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:00,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash 688879, now seen corresponding path program 1 times [2023-08-27 12:09:00,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375205052] [2023-08-27 12:09:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:00,999 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 12:09:00,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:00,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375205052] [2023-08-27 12:09:00,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375205052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:01,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112409061] [2023-08-27 12:09:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:01,001 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 12:09:01,003 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 12:09:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:01,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 12:09:01,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:01,055 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 12:09:01,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:01,066 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 12:09:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112409061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:01,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:01,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 12:09:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104308267] [2023-08-27 12:09:01,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 12:09:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 12:09:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 12:09:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 374 [2023-08-27 12:09:01,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 96 flow. Second operand has 7 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 12:09:01,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:01,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 374 [2023-08-27 12:09:01,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:01,132 INFO L124 PetriNetUnfolderBase]: 99/172 cut-off events. [2023-08-27 12:09:01,133 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 12:09:01,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 172 events. 99/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 470 event pairs, 57 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 304. Up to 161 conditions per place. [2023-08-27 12:09:01,134 INFO L140 encePairwiseOnDemand]: 367/374 looper letters, 24 selfloop transitions, 17 changer transitions 0/41 dead transitions. [2023-08-27 12:09:01,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 238 flow [2023-08-27 12:09:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 12:09:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 12:09:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 959 transitions. [2023-08-27 12:09:01,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273618538324421 [2023-08-27 12:09:01,136 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 959 transitions. [2023-08-27 12:09:01,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 959 transitions. [2023-08-27 12:09:01,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:01,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 959 transitions. [2023-08-27 12:09:01,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.83333333333334) internal successors, (959), 6 states have internal predecessors, (959), 0 states have call successors, (0), 0 states 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 12:09:01,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:01,142 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:01,142 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 96 flow. Second operand 6 states and 959 transitions. [2023-08-27 12:09:01,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 238 flow [2023-08-27 12:09:01,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 12:09:01,143 INFO L231 Difference]: Finished difference. Result has 34 places, 41 transitions, 212 flow [2023-08-27 12:09:01,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=34, PETRI_TRANSITIONS=41} [2023-08-27 12:09:01,144 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-27 12:09:01,144 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 41 transitions, 212 flow [2023-08-27 12:09:01,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.14285714285714) internal successors, (1072), 7 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states 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 12:09:01,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:01,145 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 12:09:01,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 12:09:01,350 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,SelfDestructingSolverStorable2 [2023-08-27 12:09:01,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:01,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -951552463, now seen corresponding path program 2 times [2023-08-27 12:09:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:01,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581536401] [2023-08-27 12:09:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:01,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:01,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581536401] [2023-08-27 12:09:01,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581536401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:01,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868663995] [2023-08-27 12:09:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:01,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:01,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:01,455 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 12:09:01,456 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 12:09:01,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 12:09:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:01,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 12:09:01,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:09:01,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 12:09:01,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868663995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:01,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 12:09:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 12:09:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215841222] [2023-08-27 12:09:01,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 12:09:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 12:09:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 12:09:01,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 374 [2023-08-27 12:09:01,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 41 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 12:09:01,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:01,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 374 [2023-08-27 12:09:01,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:01,566 INFO L124 PetriNetUnfolderBase]: 99/171 cut-off events. [2023-08-27 12:09:01,566 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 12:09:01,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 171 events. 99/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 471 event pairs, 57 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 355. Up to 166 conditions per place. [2023-08-27 12:09:01,567 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 34 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-08-27 12:09:01,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 282 flow [2023-08-27 12:09:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-08-27 12:09:01,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43404634581105167 [2023-08-27 12:09:01,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-08-27 12:09:01,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-08-27 12:09:01,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:01,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-08-27 12:09:01,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 12:09:01,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:01,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:01,572 INFO L175 Difference]: Start difference. First operand has 34 places, 41 transitions, 212 flow. Second operand 3 states and 487 transitions. [2023-08-27 12:09:01,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 282 flow [2023-08-27 12:09:01,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 256 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:01,574 INFO L231 Difference]: Finished difference. Result has 34 places, 40 transitions, 188 flow [2023-08-27 12:09:01,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=34, PETRI_TRANSITIONS=40} [2023-08-27 12:09:01,575 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-27 12:09:01,575 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 40 transitions, 188 flow [2023-08-27 12:09:01,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 12:09:01,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:01,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 12:09:01,583 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 12:09:01,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:01,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:01,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash -945780205, now seen corresponding path program 1 times [2023-08-27 12:09:01,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:01,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93040922] [2023-08-27 12:09:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:01,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:01,820 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 12:09:01,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:01,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93040922] [2023-08-27 12:09:01,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93040922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:01,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:01,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 12:09:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439850510] [2023-08-27 12:09:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:01,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 12:09:01,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 12:09:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 12:09:01,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 374 [2023-08-27 12:09:01,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 40 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 12:09:01,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:01,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 374 [2023-08-27 12:09:01,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:01,872 INFO L124 PetriNetUnfolderBase]: 159/271 cut-off events. [2023-08-27 12:09:01,872 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 12:09:01,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 271 events. 159/271 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 853 event pairs, 33 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 555. Up to 159 conditions per place. [2023-08-27 12:09:01,873 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-27 12:09:01,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 55 transitions, 331 flow [2023-08-27 12:09:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-27 12:09:01,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464349376114082 [2023-08-27 12:09:01,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-27 12:09:01,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-27 12:09:01,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:01,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-27 12:09:01,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 12:09:01,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:01,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:01,878 INFO L175 Difference]: Start difference. First operand has 34 places, 40 transitions, 188 flow. Second operand 3 states and 521 transitions. [2023-08-27 12:09:01,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 55 transitions, 331 flow [2023-08-27 12:09:01,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 55 transitions, 319 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 12:09:01,880 INFO L231 Difference]: Finished difference. Result has 35 places, 41 transitions, 190 flow [2023-08-27 12:09:01,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=35, PETRI_TRANSITIONS=41} [2023-08-27 12:09:01,881 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-08-27 12:09:01,881 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 41 transitions, 190 flow [2023-08-27 12:09:01,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 12:09:01,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:01,881 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 12:09:01,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 12:09:01,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:01,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:01,882 INFO L85 PathProgramCache]: Analyzing trace with hash 770866874, now seen corresponding path program 1 times [2023-08-27 12:09:01,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827639541] [2023-08-27 12:09:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:01,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827639541] [2023-08-27 12:09:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827639541] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37913209] [2023-08-27 12:09:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:01,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:01,961 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 12:09:02,008 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 12:09:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:02,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 12:09:02,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:02,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37913209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:02,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 12:09:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086240513] [2023-08-27 12:09:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 12:09:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 12:09:02,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 12:09:02,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 374 [2023-08-27 12:09:02,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 41 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 153.15384615384616) internal successors, (1991), 13 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states 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 12:09:02,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:02,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 374 [2023-08-27 12:09:02,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:02,213 INFO L124 PetriNetUnfolderBase]: 171/295 cut-off events. [2023-08-27 12:09:02,213 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-27 12:09:02,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 295 events. 171/295 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 949 event pairs, 99 based on Foata normal form. 6/201 useless extension candidates. Maximal degree in co-relation 602. Up to 266 conditions per place. [2023-08-27 12:09:02,215 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 24 selfloop transitions, 41 changer transitions 0/65 dead transitions. [2023-08-27 12:09:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 470 flow [2023-08-27 12:09:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 12:09:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 12:09:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1894 transitions. [2023-08-27 12:09:02,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42201426024955435 [2023-08-27 12:09:02,218 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1894 transitions. [2023-08-27 12:09:02,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1894 transitions. [2023-08-27 12:09:02,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:02,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1894 transitions. [2023-08-27 12:09:02,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.83333333333334) internal successors, (1894), 12 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states 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 12:09:02,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:02,226 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:02,226 INFO L175 Difference]: Start difference. First operand has 35 places, 41 transitions, 190 flow. Second operand 12 states and 1894 transitions. [2023-08-27 12:09:02,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 470 flow [2023-08-27 12:09:02,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:02,228 INFO L231 Difference]: Finished difference. Result has 51 places, 65 transitions, 474 flow [2023-08-27 12:09:02,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=474, PETRI_PLACES=51, PETRI_TRANSITIONS=65} [2023-08-27 12:09:02,229 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2023-08-27 12:09:02,229 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 65 transitions, 474 flow [2023-08-27 12:09:02,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 153.15384615384616) internal successors, (1991), 13 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states 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 12:09:02,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:02,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:02,237 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 12:09:02,435 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 12:09:02,435 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:02,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash 745700086, now seen corresponding path program 1 times [2023-08-27 12:09:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:02,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76154144] [2023-08-27 12:09:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:02,461 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 12:09:02,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76154144] [2023-08-27 12:09:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76154144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 12:09:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779465615] [2023-08-27 12:09:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 12:09:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 12:09:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 12:09:02,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 374 [2023-08-27 12:09:02,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 65 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 12:09:02,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:02,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 374 [2023-08-27 12:09:02,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:02,499 INFO L124 PetriNetUnfolderBase]: 139/243 cut-off events. [2023-08-27 12:09:02,499 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-27 12:09:02,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 243 events. 139/243 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 729 event pairs, 73 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 623. Up to 243 conditions per place. [2023-08-27 12:09:02,501 INFO L140 encePairwiseOnDemand]: 372/374 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-27 12:09:02,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 600 flow [2023-08-27 12:09:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-27 12:09:02,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44919786096256686 [2023-08-27 12:09:02,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-27 12:09:02,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-27 12:09:02,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:02,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-27 12:09:02,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 12:09:02,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:02,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:02,505 INFO L175 Difference]: Start difference. First operand has 51 places, 65 transitions, 474 flow. Second operand 3 states and 504 transitions. [2023-08-27 12:09:02,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 600 flow [2023-08-27 12:09:02,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 476 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-27 12:09:02,507 INFO L231 Difference]: Finished difference. Result has 47 places, 64 transitions, 350 flow [2023-08-27 12:09:02,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=47, PETRI_TRANSITIONS=64} [2023-08-27 12:09:02,508 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-08-27 12:09:02,508 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 64 transitions, 350 flow [2023-08-27 12:09:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 12:09:02,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:02,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:02,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 12:09:02,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:02,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash 745700085, now seen corresponding path program 1 times [2023-08-27 12:09:02,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:02,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492115278] [2023-08-27 12:09:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:02,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:02,549 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 12:09:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492115278] [2023-08-27 12:09:02,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492115278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:02,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:02,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 12:09:02,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062934115] [2023-08-27 12:09:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 12:09:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 12:09:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 12:09:02,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 374 [2023-08-27 12:09:02,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 64 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 12:09:02,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:02,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 374 [2023-08-27 12:09:02,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:02,600 INFO L124 PetriNetUnfolderBase]: 203/351 cut-off events. [2023-08-27 12:09:02,600 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-27 12:09:02,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 351 events. 203/351 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1248 event pairs, 47 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 855. Up to 181 conditions per place. [2023-08-27 12:09:02,602 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 76 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-27 12:09:02,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 544 flow [2023-08-27 12:09:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-27 12:09:02,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-08-27 12:09:02,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-27 12:09:02,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-27 12:09:02,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:02,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-27 12:09:02,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states 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 12:09:02,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:02,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:02,606 INFO L175 Difference]: Start difference. First operand has 47 places, 64 transitions, 350 flow. Second operand 3 states and 517 transitions. [2023-08-27 12:09:02,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 544 flow [2023-08-27 12:09:02,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:02,608 INFO L231 Difference]: Finished difference. Result has 49 places, 65 transitions, 361 flow [2023-08-27 12:09:02,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=49, PETRI_TRANSITIONS=65} [2023-08-27 12:09:02,609 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-08-27 12:09:02,609 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 65 transitions, 361 flow [2023-08-27 12:09:02,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states 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 12:09:02,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:02,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:02,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 12:09:02,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:02,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:02,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1641867474, now seen corresponding path program 1 times [2023-08-27 12:09:02,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:02,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982145026] [2023-08-27 12:09:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:02,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:02,657 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 12:09:02,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:02,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982145026] [2023-08-27 12:09:02,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982145026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:02,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:02,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 12:09:02,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845899227] [2023-08-27 12:09:02,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:02,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 12:09:02,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:02,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 12:09:02,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 12:09:02,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:02,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 65 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 12:09:02,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:02,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:02,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:02,730 INFO L124 PetriNetUnfolderBase]: 278/499 cut-off events. [2023-08-27 12:09:02,730 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-08-27 12:09:02,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 499 events. 278/499 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1968 event pairs, 172 based on Foata normal form. 20/427 useless extension candidates. Maximal degree in co-relation 1319. Up to 350 conditions per place. [2023-08-27 12:09:02,733 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 101 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2023-08-27 12:09:02,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 104 transitions, 767 flow [2023-08-27 12:09:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 12:09:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 12:09:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2023-08-27 12:09:02,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37967914438502676 [2023-08-27 12:09:02,735 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2023-08-27 12:09:02,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2023-08-27 12:09:02,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:02,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2023-08-27 12:09:02,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states 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 12:09:02,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 12:09:02,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 12:09:02,737 INFO L175 Difference]: Start difference. First operand has 49 places, 65 transitions, 361 flow. Second operand 4 states and 568 transitions. [2023-08-27 12:09:02,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 104 transitions, 767 flow [2023-08-27 12:09:02,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 104 transitions, 765 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:02,740 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 368 flow [2023-08-27 12:09:02,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2023-08-27 12:09:02,741 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-08-27 12:09:02,741 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 368 flow [2023-08-27 12:09:02,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 12:09:02,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:02,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:02,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 12:09:02,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:02,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1638304496, now seen corresponding path program 1 times [2023-08-27 12:09:02,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:02,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647244023] [2023-08-27 12:09:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:02,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:02,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:02,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647244023] [2023-08-27 12:09:02,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647244023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:02,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:02,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 12:09:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604386931] [2023-08-27 12:09:02,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 12:09:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 12:09:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 12:09:02,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:02,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 368 flow. Second operand has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 12:09:02,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:02,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:02,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:02,862 INFO L124 PetriNetUnfolderBase]: 222/401 cut-off events. [2023-08-27 12:09:02,862 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-08-27 12:09:02,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 401 events. 222/401 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1472 event pairs, 134 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 1095. Up to 350 conditions per place. [2023-08-27 12:09:02,864 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 95 selfloop transitions, 3 changer transitions 0/98 dead transitions. [2023-08-27 12:09:02,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 742 flow [2023-08-27 12:09:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 12:09:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 12:09:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 563 transitions. [2023-08-27 12:09:02,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37633689839572193 [2023-08-27 12:09:02,866 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 563 transitions. [2023-08-27 12:09:02,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 563 transitions. [2023-08-27 12:09:02,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:02,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 563 transitions. [2023-08-27 12:09:02,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states 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 12:09:02,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 12:09:02,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 374.0) internal successors, (1870), 5 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states 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 12:09:02,869 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 368 flow. Second operand 4 states and 563 transitions. [2023-08-27 12:09:02,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 742 flow [2023-08-27 12:09:02,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 736 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:02,872 INFO L231 Difference]: Finished difference. Result has 55 places, 65 transitions, 371 flow [2023-08-27 12:09:02,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=371, PETRI_PLACES=55, PETRI_TRANSITIONS=65} [2023-08-27 12:09:02,872 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2023-08-27 12:09:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 65 transitions, 371 flow [2023-08-27 12:09:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 12:09:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:02,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 12:09:02,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:02,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 341339792, now seen corresponding path program 1 times [2023-08-27 12:09:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747323275] [2023-08-27 12:09:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:02,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:02,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747323275] [2023-08-27 12:09:02,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747323275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:02,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:02,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 12:09:02,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946667966] [2023-08-27 12:09:02,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 12:09:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 12:09:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 12:09:02,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:02,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 65 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 12:09:02,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:02,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:02,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:03,041 INFO L124 PetriNetUnfolderBase]: 294/553 cut-off events. [2023-08-27 12:09:03,041 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-27 12:09:03,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1496 conditions, 553 events. 294/553 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2363 event pairs, 190 based on Foata normal form. 20/517 useless extension candidates. Maximal degree in co-relation 1470. Up to 388 conditions per place. [2023-08-27 12:09:03,044 INFO L140 encePairwiseOnDemand]: 369/374 looper letters, 67 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2023-08-27 12:09:03,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 579 flow [2023-08-27 12:09:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 12:09:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 12:09:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 696 transitions. [2023-08-27 12:09:03,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37219251336898396 [2023-08-27 12:09:03,046 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 696 transitions. [2023-08-27 12:09:03,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 696 transitions. [2023-08-27 12:09:03,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:03,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 696 transitions. [2023-08-27 12:09:03,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states 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 12:09:03,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:03,049 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:03,049 INFO L175 Difference]: Start difference. First operand has 55 places, 65 transitions, 371 flow. Second operand 5 states and 696 transitions. [2023-08-27 12:09:03,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 579 flow [2023-08-27 12:09:03,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 574 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 12:09:03,052 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 397 flow [2023-08-27 12:09:03,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-08-27 12:09:03,052 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2023-08-27 12:09:03,052 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 397 flow [2023-08-27 12:09:03,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 12:09:03,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:03,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:03,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 12:09:03,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:03,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash 337776814, now seen corresponding path program 1 times [2023-08-27 12:09:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783151824] [2023-08-27 12:09:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:03,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:03,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783151824] [2023-08-27 12:09:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783151824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:03,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:03,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 12:09:03,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331042067] [2023-08-27 12:09:03,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:03,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 12:09:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 12:09:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 12:09:03,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 12:09:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:03,182 INFO L124 PetriNetUnfolderBase]: 238/455 cut-off events. [2023-08-27 12:09:03,182 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2023-08-27 12:09:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 455 events. 238/455 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1823 event pairs, 69 based on Foata normal form. 6/417 useless extension candidates. Maximal degree in co-relation 1266. Up to 195 conditions per place. [2023-08-27 12:09:03,184 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 74 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2023-08-27 12:09:03,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 89 transitions, 642 flow [2023-08-27 12:09:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 12:09:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 12:09:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2023-08-27 12:09:03,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770053475935829 [2023-08-27 12:09:03,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2023-08-27 12:09:03,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2023-08-27 12:09:03,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:03,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2023-08-27 12:09:03,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 12:09:03,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:03,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:03,189 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 397 flow. Second operand 5 states and 705 transitions. [2023-08-27 12:09:03,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 89 transitions, 642 flow [2023-08-27 12:09:03,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 89 transitions, 612 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 12:09:03,192 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 400 flow [2023-08-27 12:09:03,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=400, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-27 12:09:03,192 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2023-08-27 12:09:03,192 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 400 flow [2023-08-27 12:09:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 12:09:03,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:03,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 12:09:03,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:03,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash -373085976, now seen corresponding path program 1 times [2023-08-27 12:09:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:03,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852252996] [2023-08-27 12:09:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852252996] [2023-08-27 12:09:03,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852252996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924865254] [2023-08-27 12:09:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:03,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:03,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:03,257 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 12:09:03,259 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 12:09:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:03,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 12:09:03,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:03,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924865254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:03,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:03,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 2, 2] total 9 [2023-08-27 12:09:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103384963] [2023-08-27 12:09:03,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 12:09:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 12:09:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-27 12:09:03,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:03,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 400 flow. Second operand has 11 states, 11 states have (on average 133.72727272727272) internal successors, (1471), 11 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states 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 12:09:03,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:03,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:03,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:03,586 INFO L124 PetriNetUnfolderBase]: 566/1039 cut-off events. [2023-08-27 12:09:03,586 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2023-08-27 12:09:03,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2828 conditions, 1039 events. 566/1039 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4876 event pairs, 130 based on Foata normal form. 20/971 useless extension candidates. Maximal degree in co-relation 2801. Up to 204 conditions per place. [2023-08-27 12:09:03,591 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 139 selfloop transitions, 21 changer transitions 0/160 dead transitions. [2023-08-27 12:09:03,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 160 transitions, 1024 flow [2023-08-27 12:09:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 12:09:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 12:09:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1694 transitions. [2023-08-27 12:09:03,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37745098039215685 [2023-08-27 12:09:03,594 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1694 transitions. [2023-08-27 12:09:03,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1694 transitions. [2023-08-27 12:09:03,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:03,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1694 transitions. [2023-08-27 12:09:03,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 141.16666666666666) internal successors, (1694), 12 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states 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 12:09:03,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:03,602 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:03,602 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 400 flow. Second operand 12 states and 1694 transitions. [2023-08-27 12:09:03,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 160 transitions, 1024 flow [2023-08-27 12:09:03,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 160 transitions, 995 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 12:09:03,606 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 462 flow [2023-08-27 12:09:03,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=462, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-08-27 12:09:03,606 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-08-27 12:09:03,606 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 462 flow [2023-08-27 12:09:03,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 133.72727272727272) internal successors, (1471), 11 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states 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 12:09:03,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:03,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:03,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 12:09:03,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 12:09:03,812 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:03,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash -376648956, now seen corresponding path program 1 times [2023-08-27 12:09:03,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:03,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155565295] [2023-08-27 12:09:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:03,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155565295] [2023-08-27 12:09:03,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155565295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88157963] [2023-08-27 12:09:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:03,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:03,845 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 12:09:03,847 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 12:09:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:03,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 12:09:03,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:03,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88157963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:04,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 6, 6] total 12 [2023-08-27 12:09:04,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511761309] [2023-08-27 12:09:04,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 12:09:04,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 12:09:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-27 12:09:04,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:04,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 462 flow. Second operand has 13 states, 13 states have (on average 133.07692307692307) internal successors, (1730), 13 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states 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 12:09:04,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:04,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:04,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:04,300 INFO L124 PetriNetUnfolderBase]: 475/894 cut-off events. [2023-08-27 12:09:04,300 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2023-08-27 12:09:04,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2634 conditions, 894 events. 475/894 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4128 event pairs, 165 based on Foata normal form. 10/880 useless extension candidates. Maximal degree in co-relation 2603. Up to 338 conditions per place. [2023-08-27 12:09:04,305 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 99 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2023-08-27 12:09:04,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 867 flow [2023-08-27 12:09:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 12:09:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 12:09:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1386 transitions. [2023-08-27 12:09:04,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37058823529411766 [2023-08-27 12:09:04,308 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1386 transitions. [2023-08-27 12:09:04,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1386 transitions. [2023-08-27 12:09:04,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:04,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1386 transitions. [2023-08-27 12:09:04,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states 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 12:09:04,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:09:04,315 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:09:04,315 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 462 flow. Second operand 10 states and 1386 transitions. [2023-08-27 12:09:04,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 867 flow [2023-08-27 12:09:04,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 825 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-27 12:09:04,320 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 473 flow [2023-08-27 12:09:04,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=473, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-08-27 12:09:04,322 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2023-08-27 12:09:04,322 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 473 flow [2023-08-27 12:09:04,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 133.07692307692307) internal successors, (1730), 13 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states 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 12:09:04,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:04,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:04,341 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 12:09:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:04,528 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:04,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1049011282, now seen corresponding path program 1 times [2023-08-27 12:09:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:04,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640444209] [2023-08-27 12:09:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:09:04,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:04,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640444209] [2023-08-27 12:09:04,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640444209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:04,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896976108] [2023-08-27 12:09:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:04,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:04,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:04,603 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 12:09:04,604 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 12:09:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:04,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 12:09:04,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:04,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:04,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896976108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:04,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:04,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 5, 5] total 11 [2023-08-27 12:09:04,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964293072] [2023-08-27 12:09:04,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:04,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 12:09:04,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 12:09:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 12:09:04,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:04,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 473 flow. Second operand has 12 states, 12 states have (on average 133.41666666666666) internal successors, (1601), 12 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states 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 12:09:04,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:04,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:04,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:05,135 INFO L124 PetriNetUnfolderBase]: 917/1717 cut-off events. [2023-08-27 12:09:05,136 INFO L125 PetriNetUnfolderBase]: For 2159/2159 co-relation queries the response was YES. [2023-08-27 12:09:05,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4957 conditions, 1717 events. 917/1717 cut-off events. For 2159/2159 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9247 event pairs, 294 based on Foata normal form. 36/1729 useless extension candidates. Maximal degree in co-relation 4926. Up to 385 conditions per place. [2023-08-27 12:09:05,144 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 181 selfloop transitions, 15 changer transitions 0/196 dead transitions. [2023-08-27 12:09:05,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 196 transitions, 1535 flow [2023-08-27 12:09:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 12:09:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 12:09:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1674 transitions. [2023-08-27 12:09:05,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729946524064171 [2023-08-27 12:09:05,147 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1674 transitions. [2023-08-27 12:09:05,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1674 transitions. [2023-08-27 12:09:05,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:05,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1674 transitions. [2023-08-27 12:09:05,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 139.5) internal successors, (1674), 12 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states 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 12:09:05,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:05,153 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:05,154 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 473 flow. Second operand 12 states and 1674 transitions. [2023-08-27 12:09:05,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 196 transitions, 1535 flow [2023-08-27 12:09:05,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 196 transitions, 1489 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 12:09:05,160 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 580 flow [2023-08-27 12:09:05,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=580, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2023-08-27 12:09:05,160 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-08-27 12:09:05,160 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 580 flow [2023-08-27 12:09:05,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.41666666666666) internal successors, (1601), 12 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states 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 12:09:05,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:05,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:05,166 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 12:09:05,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:05,366 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:05,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash 626482899, now seen corresponding path program 1 times [2023-08-27 12:09:05,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:05,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190442116] [2023-08-27 12:09:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:05,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:05,464 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 12:09:05,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190442116] [2023-08-27 12:09:05,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190442116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:05,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:05,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 12:09:05,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670611357] [2023-08-27 12:09:05,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 12:09:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 12:09:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 12:09:05,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 374 [2023-08-27 12:09:05,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 580 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 12:09:05,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:05,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 374 [2023-08-27 12:09:05,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:05,706 INFO L124 PetriNetUnfolderBase]: 917/1708 cut-off events. [2023-08-27 12:09:05,707 INFO L125 PetriNetUnfolderBase]: For 2842/2842 co-relation queries the response was YES. [2023-08-27 12:09:05,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5346 conditions, 1708 events. 917/1708 cut-off events. For 2842/2842 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9037 event pairs, 295 based on Foata normal form. 9/1693 useless extension candidates. Maximal degree in co-relation 5309. Up to 1311 conditions per place. [2023-08-27 12:09:05,716 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 82 selfloop transitions, 7 changer transitions 4/93 dead transitions. [2023-08-27 12:09:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 93 transitions, 851 flow [2023-08-27 12:09:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-27 12:09:05,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028520499108736 [2023-08-27 12:09:05,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-27 12:09:05,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-27 12:09:05,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:05,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-27 12:09:05,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 12:09:05,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:05,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:05,720 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 580 flow. Second operand 3 states and 494 transitions. [2023-08-27 12:09:05,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 93 transitions, 851 flow [2023-08-27 12:09:05,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 833 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 12:09:05,727 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 615 flow [2023-08-27 12:09:05,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=615, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2023-08-27 12:09:05,728 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-08-27 12:09:05,728 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 615 flow [2023-08-27 12:09:05,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 12:09:05,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:05,729 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 12:09:05,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 12:09:05,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:05,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 470689594, now seen corresponding path program 2 times [2023-08-27 12:09:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125320913] [2023-08-27 12:09:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:05,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125320913] [2023-08-27 12:09:05,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125320913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768060738] [2023-08-27 12:09:05,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:05,902 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 12:09:05,932 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 12:09:06,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 12:09:06,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:06,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 12:09:06,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-27 12:09:06,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 12:09:06,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768060738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:06,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 12:09:06,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 12:09:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441847639] [2023-08-27 12:09:06,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:06,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 12:09:06,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 12:09:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 12:09:06,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 374 [2023-08-27 12:09:06,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 615 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 12:09:06,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:06,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 374 [2023-08-27 12:09:06,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:06,196 INFO L124 PetriNetUnfolderBase]: 839/1529 cut-off events. [2023-08-27 12:09:06,197 INFO L125 PetriNetUnfolderBase]: For 3227/3227 co-relation queries the response was YES. [2023-08-27 12:09:06,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4852 conditions, 1529 events. 839/1529 cut-off events. For 3227/3227 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8030 event pairs, 589 based on Foata normal form. 29/1536 useless extension candidates. Maximal degree in co-relation 4814. Up to 1529 conditions per place. [2023-08-27 12:09:06,206 INFO L140 encePairwiseOnDemand]: 371/374 looper letters, 73 selfloop transitions, 1 changer transitions 3/77 dead transitions. [2023-08-27 12:09:06,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 700 flow [2023-08-27 12:09:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 12:09:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 12:09:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-27 12:09:06,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126559714795009 [2023-08-27 12:09:06,208 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-27 12:09:06,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-27 12:09:06,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:06,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-27 12:09:06,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 12:09:06,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:06,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 374.0) internal successors, (1496), 4 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 12:09:06,210 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 615 flow. Second operand 3 states and 463 transitions. [2023-08-27 12:09:06,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 700 flow [2023-08-27 12:09:06,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 582 flow, removed 8 selfloop flow, removed 19 redundant places. [2023-08-27 12:09:06,216 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 404 flow [2023-08-27 12:09:06,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-08-27 12:09:06,216 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-08-27 12:09:06,217 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 404 flow [2023-08-27 12:09:06,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states 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 12:09:06,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:06,217 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-27 12:09:06,231 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 12:09:06,421 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,SelfDestructingSolverStorable16 [2023-08-27 12:09:06,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:06,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash 599376589, now seen corresponding path program 2 times [2023-08-27 12:09:06,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:06,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933903712] [2023-08-27 12:09:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:06,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:06,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933903712] [2023-08-27 12:09:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933903712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142471359] [2023-08-27 12:09:06,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:06,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:06,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:06,607 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 12:09:06,609 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 12:09:06,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 12:09:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:06,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 12:09:06,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:09:06,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:09:06,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142471359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:06,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:06,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 2, 2] total 9 [2023-08-27 12:09:06,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320398314] [2023-08-27 12:09:06,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:06,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 12:09:06,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 12:09:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-27 12:09:06,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:06,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 404 flow. Second operand has 10 states, 10 states have (on average 133.3) internal successors, (1333), 10 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states 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 12:09:06,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:06,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:06,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:07,033 INFO L124 PetriNetUnfolderBase]: 1269/2363 cut-off events. [2023-08-27 12:09:07,033 INFO L125 PetriNetUnfolderBase]: For 2425/2425 co-relation queries the response was YES. [2023-08-27 12:09:07,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6423 conditions, 2363 events. 1269/2363 cut-off events. For 2425/2425 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13701 event pairs, 576 based on Foata normal form. 22/2385 useless extension candidates. Maximal degree in co-relation 6402. Up to 650 conditions per place. [2023-08-27 12:09:07,045 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 195 selfloop transitions, 22 changer transitions 0/217 dead transitions. [2023-08-27 12:09:07,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 217 transitions, 1422 flow [2023-08-27 12:09:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 12:09:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 12:09:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1674 transitions. [2023-08-27 12:09:07,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729946524064171 [2023-08-27 12:09:07,048 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1674 transitions. [2023-08-27 12:09:07,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1674 transitions. [2023-08-27 12:09:07,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:07,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1674 transitions. [2023-08-27 12:09:07,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 139.5) internal successors, (1674), 12 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states 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 12:09:07,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:07,055 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 374.0) internal successors, (4862), 13 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states 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 12:09:07,055 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 404 flow. Second operand 12 states and 1674 transitions. [2023-08-27 12:09:07,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 217 transitions, 1422 flow [2023-08-27 12:09:07,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 217 transitions, 1387 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-27 12:09:07,061 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 495 flow [2023-08-27 12:09:07,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=495, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-27 12:09:07,061 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-08-27 12:09:07,061 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 495 flow [2023-08-27 12:09:07,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.3) internal successors, (1333), 10 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states 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 12:09:07,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:07,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:07,080 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 12:09:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 12:09:07,267 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:07,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1606887146, now seen corresponding path program 1 times [2023-08-27 12:09:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541460431] [2023-08-27 12:09:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541460431] [2023-08-27 12:09:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541460431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922926881] [2023-08-27 12:09:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:07,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:07,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:07,360 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 12:09:07,383 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 12:09:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:07,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 12:09:07,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:07,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922926881] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:07,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 12:09:07,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-08-27 12:09:07,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857661756] [2023-08-27 12:09:07,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:07,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 12:09:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 12:09:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-08-27 12:09:07,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 374 [2023-08-27 12:09:07,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 495 flow. Second operand has 6 states, 6 states have (on average 130.66666666666666) internal successors, (784), 6 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 12:09:07,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:07,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 374 [2023-08-27 12:09:07,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:07,802 INFO L124 PetriNetUnfolderBase]: 1203/2349 cut-off events. [2023-08-27 12:09:07,803 INFO L125 PetriNetUnfolderBase]: For 3334/3334 co-relation queries the response was YES. [2023-08-27 12:09:07,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6720 conditions, 2349 events. 1203/2349 cut-off events. For 3334/3334 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14339 event pairs, 400 based on Foata normal form. 96/2445 useless extension candidates. Maximal degree in co-relation 6700. Up to 999 conditions per place. [2023-08-27 12:09:07,812 INFO L140 encePairwiseOnDemand]: 367/374 looper letters, 76 selfloop transitions, 30 changer transitions 0/106 dead transitions. [2023-08-27 12:09:07,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 799 flow [2023-08-27 12:09:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 12:09:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 12:09:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 939 transitions. [2023-08-27 12:09:07,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586707410236822 [2023-08-27 12:09:07,814 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 939 transitions. [2023-08-27 12:09:07,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 939 transitions. [2023-08-27 12:09:07,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:07,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 939 transitions. [2023-08-27 12:09:07,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.14285714285714) internal successors, (939), 7 states have internal predecessors, (939), 0 states have call successors, (0), 0 states 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 12:09:07,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 12:09:07,818 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 12:09:07,818 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 495 flow. Second operand 7 states and 939 transitions. [2023-08-27 12:09:07,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 799 flow [2023-08-27 12:09:07,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 784 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 12:09:07,822 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 585 flow [2023-08-27 12:09:07,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=585, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-08-27 12:09:07,822 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-08-27 12:09:07,823 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 585 flow [2023-08-27 12:09:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.66666666666666) internal successors, (784), 6 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 12:09:07,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:07,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:07,830 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 12:09:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:08,028 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:08,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2053540420, now seen corresponding path program 1 times [2023-08-27 12:09:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665131399] [2023-08-27 12:09:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:08,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:08,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:08,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665131399] [2023-08-27 12:09:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665131399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:08,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598437178] [2023-08-27 12:09:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:08,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:08,371 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 12:09:08,373 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 12:09:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:08,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 12:09:08,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:08,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:08,805 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:09:08,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:09:08,825 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:09:08,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:09:08,831 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:09:08,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:09:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598437178] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:08,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 12:09:08,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 18 [2023-08-27 12:09:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005332373] [2023-08-27 12:09:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 12:09:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 12:09:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-27 12:09:08,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 374 [2023-08-27 12:09:08,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 585 flow. Second operand has 8 states, 8 states have (on average 111.125) internal successors, (889), 8 states have internal predecessors, (889), 0 states have call successors, (0), 0 states 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 12:09:08,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:08,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 374 [2023-08-27 12:09:08,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:09,313 INFO L124 PetriNetUnfolderBase]: 1281/2469 cut-off events. [2023-08-27 12:09:09,313 INFO L125 PetriNetUnfolderBase]: For 6080/6080 co-relation queries the response was YES. [2023-08-27 12:09:09,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7795 conditions, 2469 events. 1281/2469 cut-off events. For 6080/6080 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15128 event pairs, 410 based on Foata normal form. 12/2481 useless extension candidates. Maximal degree in co-relation 7773. Up to 2079 conditions per place. [2023-08-27 12:09:09,324 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 68 selfloop transitions, 32 changer transitions 4/104 dead transitions. [2023-08-27 12:09:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 104 transitions, 950 flow [2023-08-27 12:09:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 12:09:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 12:09:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2023-08-27 12:09:09,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3054812834224599 [2023-08-27 12:09:09,326 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2023-08-27 12:09:09,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2023-08-27 12:09:09,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:09,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2023-08-27 12:09:09,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 12:09:09,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states 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 12:09:09,330 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states 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 12:09:09,330 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 585 flow. Second operand 8 states and 914 transitions. [2023-08-27 12:09:09,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 104 transitions, 950 flow [2023-08-27 12:09:09,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 900 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-27 12:09:09,335 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 759 flow [2023-08-27 12:09:09,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=759, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2023-08-27 12:09:09,336 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2023-08-27 12:09:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 759 flow [2023-08-27 12:09:09,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.125) internal successors, (889), 8 states have internal predecessors, (889), 0 states have call successors, (0), 0 states 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 12:09:09,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:09,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:09,364 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 12:09:09,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:09,542 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:09,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:09,542 INFO L85 PathProgramCache]: Analyzing trace with hash -982875902, now seen corresponding path program 2 times [2023-08-27 12:09:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:09,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572967736] [2023-08-27 12:09:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:09,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:09,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572967736] [2023-08-27 12:09:09,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572967736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:09,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757759284] [2023-08-27 12:09:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:09,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:09,890 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 12:09:09,892 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 12:09:09,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:09:09,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:09,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 12:09:09,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:10,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:10,268 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-27 12:09:10,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-08-27 12:09:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:10,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757759284] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:10,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 12:09:10,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-08-27 12:09:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574921380] [2023-08-27 12:09:10,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 12:09:10,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 12:09:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-27 12:09:10,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 374 [2023-08-27 12:09:10,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 759 flow. Second operand has 8 states, 8 states have (on average 111.125) internal successors, (889), 8 states have internal predecessors, (889), 0 states have call successors, (0), 0 states 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 12:09:10,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:10,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 374 [2023-08-27 12:09:10,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:10,724 INFO L124 PetriNetUnfolderBase]: 1251/2427 cut-off events. [2023-08-27 12:09:10,725 INFO L125 PetriNetUnfolderBase]: For 5994/5994 co-relation queries the response was YES. [2023-08-27 12:09:10,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8348 conditions, 2427 events. 1251/2427 cut-off events. For 5994/5994 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15047 event pairs, 434 based on Foata normal form. 12/2439 useless extension candidates. Maximal degree in co-relation 8323. Up to 2067 conditions per place. [2023-08-27 12:09:10,735 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 69 selfloop transitions, 36 changer transitions 7/112 dead transitions. [2023-08-27 12:09:10,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 1150 flow [2023-08-27 12:09:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 12:09:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 12:09:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2023-08-27 12:09:10,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30514705882352944 [2023-08-27 12:09:10,737 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2023-08-27 12:09:10,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2023-08-27 12:09:10,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:10,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2023-08-27 12:09:10,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 states 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 12:09:10,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states 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 12:09:10,741 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states 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 12:09:10,741 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 759 flow. Second operand 8 states and 913 transitions. [2023-08-27 12:09:10,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 1150 flow [2023-08-27 12:09:10,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 1070 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-27 12:09:10,751 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 903 flow [2023-08-27 12:09:10,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2023-08-27 12:09:10,751 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2023-08-27 12:09:10,751 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 903 flow [2023-08-27 12:09:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.125) internal successors, (889), 8 states have internal predecessors, (889), 0 states have call successors, (0), 0 states 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 12:09:10,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:10,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:10,781 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 12:09:10,957 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,SelfDestructingSolverStorable20 [2023-08-27 12:09:10,958 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:10,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash -55582799, now seen corresponding path program 1 times [2023-08-27 12:09:10,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:10,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389678771] [2023-08-27 12:09:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:10,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:11,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:11,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389678771] [2023-08-27 12:09:11,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389678771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:11,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 12:09:11,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-27 12:09:11,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377826732] [2023-08-27 12:09:11,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:11,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 12:09:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 12:09:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-27 12:09:11,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 374 [2023-08-27 12:09:11,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 903 flow. Second operand has 8 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 12:09:11,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:11,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 374 [2023-08-27 12:09:11,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:11,630 INFO L124 PetriNetUnfolderBase]: 1209/2373 cut-off events. [2023-08-27 12:09:11,630 INFO L125 PetriNetUnfolderBase]: For 6068/6068 co-relation queries the response was YES. [2023-08-27 12:09:11,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8538 conditions, 2373 events. 1209/2373 cut-off events. For 6068/6068 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14686 event pairs, 524 based on Foata normal form. 24/2397 useless extension candidates. Maximal degree in co-relation 8512. Up to 2043 conditions per place. [2023-08-27 12:09:11,641 INFO L140 encePairwiseOnDemand]: 369/374 looper letters, 78 selfloop transitions, 26 changer transitions 10/114 dead transitions. [2023-08-27 12:09:11,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 1202 flow [2023-08-27 12:09:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 12:09:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 12:09:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 655 transitions. [2023-08-27 12:09:11,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502673796791444 [2023-08-27 12:09:11,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 655 transitions. [2023-08-27 12:09:11,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 655 transitions. [2023-08-27 12:09:11,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:11,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 655 transitions. [2023-08-27 12:09:11,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states 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 12:09:11,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:11,646 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:11,646 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 903 flow. Second operand 5 states and 655 transitions. [2023-08-27 12:09:11,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 1202 flow [2023-08-27 12:09:11,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 1151 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-27 12:09:11,657 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 943 flow [2023-08-27 12:09:11,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=943, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-08-27 12:09:11,657 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2023-08-27 12:09:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 943 flow [2023-08-27 12:09:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 12:09:11,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:11,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:11,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-27 12:09:11,658 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:11,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1482991302, now seen corresponding path program 3 times [2023-08-27 12:09:11,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712407212] [2023-08-27 12:09:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:11,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:12,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712407212] [2023-08-27 12:09:12,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712407212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397813746] [2023-08-27 12:09:12,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:09:12,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:12,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:12,016 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 12:09:12,018 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 12:09:12,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 12:09:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:12,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 12:09:12,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:12,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:12,414 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:09:12,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:09:12,433 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:09:12,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:09:12,438 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:09:12,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:09:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:12,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397813746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:12,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:12,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-08-27 12:09:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580841931] [2023-08-27 12:09:12,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:12,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 12:09:12,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:12,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 12:09:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-27 12:09:12,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:09:12,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 943 flow. Second operand has 18 states, 18 states have (on average 106.88888888888889) internal successors, (1924), 18 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states 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 12:09:12,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:12,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:09:12,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:12,927 INFO L124 PetriNetUnfolderBase]: 1238/2424 cut-off events. [2023-08-27 12:09:12,928 INFO L125 PetriNetUnfolderBase]: For 6614/6614 co-relation queries the response was YES. [2023-08-27 12:09:12,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8942 conditions, 2424 events. 1238/2424 cut-off events. For 6614/6614 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15100 event pairs, 250 based on Foata normal form. 66/2490 useless extension candidates. Maximal degree in co-relation 8916. Up to 2068 conditions per place. [2023-08-27 12:09:12,939 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 65 selfloop transitions, 52 changer transitions 0/117 dead transitions. [2023-08-27 12:09:12,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1276 flow [2023-08-27 12:09:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 12:09:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 12:09:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 988 transitions. [2023-08-27 12:09:12,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2935234699940582 [2023-08-27 12:09:12,941 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 988 transitions. [2023-08-27 12:09:12,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 988 transitions. [2023-08-27 12:09:12,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:12,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 988 transitions. [2023-08-27 12:09:12,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.77777777777777) internal successors, (988), 9 states have internal predecessors, (988), 0 states have call successors, (0), 0 states 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 12:09:12,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:09:12,945 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:09:12,945 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 943 flow. Second operand 9 states and 988 transitions. [2023-08-27 12:09:12,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1276 flow [2023-08-27 12:09:12,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 1249 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:12,956 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 1053 flow [2023-08-27 12:09:12,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2023-08-27 12:09:12,956 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2023-08-27 12:09:12,956 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 1053 flow [2023-08-27 12:09:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 106.88888888888889) internal successors, (1924), 18 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states 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 12:09:12,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:12,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:12,965 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 12:09:13,163 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,SelfDestructingSolverStorable22 [2023-08-27 12:09:13,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:13,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:13,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1343008089, now seen corresponding path program 2 times [2023-08-27 12:09:13,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:13,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972699842] [2023-08-27 12:09:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:13,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972699842] [2023-08-27 12:09:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972699842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:13,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260312550] [2023-08-27 12:09:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:13,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:13,410 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 12:09:13,412 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 12:09:13,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:09:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:13,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 12:09:13,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:13,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:13,686 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:09:13,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:09:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260312550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:13,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-27 12:09:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441846918] [2023-08-27 12:09:13,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 12:09:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 12:09:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-27 12:09:13,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:13,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 1053 flow. Second operand has 11 states, 11 states have (on average 133.9090909090909) internal successors, (1473), 11 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states 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 12:09:13,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:13,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:13,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:14,029 INFO L124 PetriNetUnfolderBase]: 1322/2568 cut-off events. [2023-08-27 12:09:14,030 INFO L125 PetriNetUnfolderBase]: For 10673/10673 co-relation queries the response was YES. [2023-08-27 12:09:14,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10363 conditions, 2568 events. 1322/2568 cut-off events. For 10673/10673 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16005 event pairs, 446 based on Foata normal form. 60/2628 useless extension candidates. Maximal degree in co-relation 10335. Up to 2274 conditions per place. [2023-08-27 12:09:14,043 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 85 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2023-08-27 12:09:14,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1418 flow [2023-08-27 12:09:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 12:09:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 12:09:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 691 transitions. [2023-08-27 12:09:14,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695187165775401 [2023-08-27 12:09:14,045 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 691 transitions. [2023-08-27 12:09:14,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 691 transitions. [2023-08-27 12:09:14,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:14,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 691 transitions. [2023-08-27 12:09:14,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.2) internal successors, (691), 5 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 12:09:14,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:14,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 374.0) internal successors, (2244), 6 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states 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 12:09:14,047 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 1053 flow. Second operand 5 states and 691 transitions. [2023-08-27 12:09:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1418 flow [2023-08-27 12:09:14,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 1327 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 12:09:14,063 INFO L231 Difference]: Finished difference. Result has 86 places, 108 transitions, 1143 flow [2023-08-27 12:09:14,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1143, PETRI_PLACES=86, PETRI_TRANSITIONS=108} [2023-08-27 12:09:14,064 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2023-08-27 12:09:14,064 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 108 transitions, 1143 flow [2023-08-27 12:09:14,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 133.9090909090909) internal successors, (1473), 11 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states 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 12:09:14,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:14,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:14,072 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 12:09:14,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:14,270 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:14,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash 284565726, now seen corresponding path program 4 times [2023-08-27 12:09:14,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:14,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620578400] [2023-08-27 12:09:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:14,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:14,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620578400] [2023-08-27 12:09:14,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620578400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:14,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325116778] [2023-08-27 12:09:14,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:09:14,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:14,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:14,764 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 12:09:14,766 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 12:09:14,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:09:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:14,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 12:09:14,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:14,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:14,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:09:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:15,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:15,231 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((v_ArrVal_727 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_727) ~B~0.base) .cse4) |c_thread1Thread1of1ForFork0_#t~mem1|))))) (and (or .cse0 (< c_~i_BA~0 c_~Bn~0)) (or .cse0 (< c_~i_BA~0 c_~An~0)) (forall ((v_ArrVal_727 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_727))) (let ((.cse1 (select .cse3 ~B~0.base))) (or (let ((.cse2 (* c_~i_BA~0 4))) (= (select .cse1 (+ .cse2 c_~B~0.offset)) (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse2)))) (not (= (select .cse1 .cse4) |c_thread1Thread1of1ForFork0_#t~mem1|))))))))) is different from false [2023-08-27 12:09:15,371 INFO L322 Elim1Store]: treesize reduction 22, result has 88.0 percent of original size [2023-08-27 12:09:15,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 308 [2023-08-27 12:09:15,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:15,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 150 [2023-08-27 12:09:15,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 111 [2023-08-27 12:09:15,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 105 [2023-08-27 12:09:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:17,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325116778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:17,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:17,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 20 [2023-08-27 12:09:17,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883906022] [2023-08-27 12:09:17,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:17,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 12:09:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 12:09:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=323, Unknown=1, NotChecked=36, Total=420 [2023-08-27 12:09:17,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 374 [2023-08-27 12:09:17,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 108 transitions, 1143 flow. Second operand has 21 states, 21 states have (on average 103.04761904761905) internal successors, (2164), 21 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states 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 12:09:17,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:17,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 374 [2023-08-27 12:09:17,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:20,074 INFO L124 PetriNetUnfolderBase]: 1447/2881 cut-off events. [2023-08-27 12:09:20,074 INFO L125 PetriNetUnfolderBase]: For 13524/13524 co-relation queries the response was YES. [2023-08-27 12:09:20,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11815 conditions, 2881 events. 1447/2881 cut-off events. For 13524/13524 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19056 event pairs, 354 based on Foata normal form. 66/2947 useless extension candidates. Maximal degree in co-relation 11786. Up to 2260 conditions per place. [2023-08-27 12:09:20,118 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 83 selfloop transitions, 54 changer transitions 1/138 dead transitions. [2023-08-27 12:09:20,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1721 flow [2023-08-27 12:09:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 12:09:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 12:09:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 958 transitions. [2023-08-27 12:09:20,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2846108140225787 [2023-08-27 12:09:20,120 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 958 transitions. [2023-08-27 12:09:20,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 958 transitions. [2023-08-27 12:09:20,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:20,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 958 transitions. [2023-08-27 12:09:20,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.44444444444444) internal successors, (958), 9 states have internal predecessors, (958), 0 states have call successors, (0), 0 states 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 12:09:20,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:09:20,137 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:09:20,137 INFO L175 Difference]: Start difference. First operand has 86 places, 108 transitions, 1143 flow. Second operand 9 states and 958 transitions. [2023-08-27 12:09:20,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1721 flow [2023-08-27 12:09:20,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1637 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-27 12:09:20,157 INFO L231 Difference]: Finished difference. Result has 93 places, 120 transitions, 1422 flow [2023-08-27 12:09:20,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=93, PETRI_TRANSITIONS=120} [2023-08-27 12:09:20,158 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-08-27 12:09:20,158 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 120 transitions, 1422 flow [2023-08-27 12:09:20,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 103.04761904761905) internal successors, (2164), 21 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states 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 12:09:20,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:20,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:20,181 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 12:09:20,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:20,373 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:20,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:20,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1012796129, now seen corresponding path program 3 times [2023-08-27 12:09:20,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:20,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394470789] [2023-08-27 12:09:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:20,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394470789] [2023-08-27 12:09:20,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394470789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953377357] [2023-08-27 12:09:20,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:09:20,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:20,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:20,725 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 12:09:20,727 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 12:09:20,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 12:09:20,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:20,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 12:09:20,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:20,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:20,965 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:09:20,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:09:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953377357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:20,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 10 [2023-08-27 12:09:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116503121] [2023-08-27 12:09:20,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:20,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 12:09:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 12:09:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-27 12:09:20,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:20,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 1422 flow. Second operand has 11 states, 11 states have (on average 133.9090909090909) internal successors, (1473), 11 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states 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 12:09:20,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:20,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:20,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:21,337 INFO L124 PetriNetUnfolderBase]: 1531/3025 cut-off events. [2023-08-27 12:09:21,337 INFO L125 PetriNetUnfolderBase]: For 17515/17515 co-relation queries the response was YES. [2023-08-27 12:09:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13961 conditions, 3025 events. 1531/3025 cut-off events. For 17515/17515 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19982 event pairs, 344 based on Foata normal form. 60/3085 useless extension candidates. Maximal degree in co-relation 13930. Up to 2089 conditions per place. [2023-08-27 12:09:21,354 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 92 selfloop transitions, 53 changer transitions 0/145 dead transitions. [2023-08-27 12:09:21,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 145 transitions, 1904 flow [2023-08-27 12:09:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 12:09:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 12:09:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-08-27 12:09:21,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3689839572192513 [2023-08-27 12:09:21,356 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-08-27 12:09:21,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-08-27 12:09:21,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:21,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-08-27 12:09:21,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 12:09:21,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:21,359 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:21,359 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 1422 flow. Second operand 6 states and 828 transitions. [2023-08-27 12:09:21,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 145 transitions, 1904 flow [2023-08-27 12:09:21,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 145 transitions, 1827 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 12:09:21,393 INFO L231 Difference]: Finished difference. Result has 93 places, 126 transitions, 1565 flow [2023-08-27 12:09:21,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1565, PETRI_PLACES=93, PETRI_TRANSITIONS=126} [2023-08-27 12:09:21,394 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-08-27 12:09:21,394 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 126 transitions, 1565 flow [2023-08-27 12:09:21,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 133.9090909090909) internal successors, (1473), 11 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states 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 12:09:21,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:21,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:21,402 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 12:09:21,600 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,SelfDestructingSolverStorable25 [2023-08-27 12:09:21,600 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:21,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2099902392, now seen corresponding path program 5 times [2023-08-27 12:09:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:21,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121145278] [2023-08-27 12:09:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:22,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:22,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121145278] [2023-08-27 12:09:22,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121145278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:22,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143427265] [2023-08-27 12:09:22,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:09:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:22,152 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 12:09:22,154 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 12:09:22,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:09:22,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:22,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 12:09:22,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:22,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:22,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:09:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:22,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 12:09:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143427265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 12:09:22,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 12:09:22,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-08-27 12:09:22,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173826169] [2023-08-27 12:09:22,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 12:09:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 12:09:22,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 12:09:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-08-27 12:09:22,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 374 [2023-08-27 12:09:22,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 126 transitions, 1565 flow. Second operand has 8 states, 8 states have (on average 123.125) internal successors, (985), 8 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 12:09:22,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:22,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 374 [2023-08-27 12:09:22,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:22,916 INFO L124 PetriNetUnfolderBase]: 1507/2913 cut-off events. [2023-08-27 12:09:22,917 INFO L125 PetriNetUnfolderBase]: For 20180/20180 co-relation queries the response was YES. [2023-08-27 12:09:22,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13755 conditions, 2913 events. 1507/2913 cut-off events. For 20180/20180 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18571 event pairs, 624 based on Foata normal form. 12/2925 useless extension candidates. Maximal degree in co-relation 13724. Up to 2709 conditions per place. [2023-08-27 12:09:22,933 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 85 selfloop transitions, 38 changer transitions 3/126 dead transitions. [2023-08-27 12:09:22,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 126 transitions, 1700 flow [2023-08-27 12:09:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 12:09:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 12:09:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 759 transitions. [2023-08-27 12:09:22,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382352941176471 [2023-08-27 12:09:22,935 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 759 transitions. [2023-08-27 12:09:22,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 759 transitions. [2023-08-27 12:09:22,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:22,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 759 transitions. [2023-08-27 12:09:22,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.5) internal successors, (759), 6 states have internal predecessors, (759), 0 states have call successors, (0), 0 states 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 12:09:22,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:22,937 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:22,937 INFO L175 Difference]: Start difference. First operand has 93 places, 126 transitions, 1565 flow. Second operand 6 states and 759 transitions. [2023-08-27 12:09:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 126 transitions, 1700 flow [2023-08-27 12:09:22,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1502 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-08-27 12:09:22,979 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1288 flow [2023-08-27 12:09:22,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1288, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2023-08-27 12:09:22,979 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2023-08-27 12:09:22,980 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1288 flow [2023-08-27 12:09:22,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.125) internal successors, (985), 8 states have internal predecessors, (985), 0 states have call successors, (0), 0 states 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 12:09:22,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:22,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:22,986 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 12:09:23,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 12:09:23,186 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:23,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 144582513, now seen corresponding path program 4 times [2023-08-27 12:09:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:23,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785775987] [2023-08-27 12:09:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785775987] [2023-08-27 12:09:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785775987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296840310] [2023-08-27 12:09:23,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:09:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:23,481 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 12:09:23,483 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 12:09:23,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:09:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:23,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 12:09:23,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:23,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 12:09:23,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:23,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:09:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:23,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:23,915 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_846))) (let ((.cse0 (select .cse2 c_~B~0.base))) (or (= (select .cse0 (+ c_~B~0.offset (* c_~i_AB~0 4))) |c_thread1Thread1of1ForFork0_#t~mem1|) (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))))))) is different from false [2023-08-27 12:09:23,922 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_846))) (let ((.cse0 (select .cse3 c_~B~0.base))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select .cse0 (+ c_~B~0.offset .cse1)) (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1)))) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse2 c_~B~0.offset)) (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse2))))))))) is different from false [2023-08-27 12:09:23,941 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_845 (Array Int Int)) (v_ArrVal_846 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_845))) (let ((.cse2 (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_846))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (let ((.cse4 (* c_~i_AB~0 4))) (= (select (select .cse3 c_~A~0.base) (+ c_~A~0.offset .cse4)) (select .cse0 (+ .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))))) is different from false [2023-08-27 12:09:23,953 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:23,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 73 [2023-08-27 12:09:23,992 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:23,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2132 treesize of output 1856 [2023-08-27 12:09:24,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:24,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 512 treesize of output 492 [2023-08-27 12:09:24,069 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:24,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 428 treesize of output 340 [2023-08-27 12:09:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-27 12:09:27,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296840310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:27,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:27,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-27 12:09:27,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700950043] [2023-08-27 12:09:27,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:27,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 12:09:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 12:09:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=243, Unknown=3, NotChecked=102, Total=420 [2023-08-27 12:09:27,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 374 [2023-08-27 12:09:27,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1288 flow. Second operand has 21 states, 21 states have (on average 110.9047619047619) internal successors, (2329), 21 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states 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 12:09:27,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:27,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 374 [2023-08-27 12:09:27,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:27,868 INFO L124 PetriNetUnfolderBase]: 1357/2589 cut-off events. [2023-08-27 12:09:27,869 INFO L125 PetriNetUnfolderBase]: For 13402/13402 co-relation queries the response was YES. [2023-08-27 12:09:27,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11911 conditions, 2589 events. 1357/2589 cut-off events. For 13402/13402 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15765 event pairs, 506 based on Foata normal form. 60/2649 useless extension candidates. Maximal degree in co-relation 11882. Up to 2217 conditions per place. [2023-08-27 12:09:27,881 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 77 selfloop transitions, 52 changer transitions 0/129 dead transitions. [2023-08-27 12:09:27,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 129 transitions, 1594 flow [2023-08-27 12:09:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 12:09:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 12:09:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 690 transitions. [2023-08-27 12:09:27,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3074866310160428 [2023-08-27 12:09:27,882 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 690 transitions. [2023-08-27 12:09:27,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 690 transitions. [2023-08-27 12:09:27,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:27,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 690 transitions. [2023-08-27 12:09:27,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 12:09:27,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:27,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:27,886 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1288 flow. Second operand 6 states and 690 transitions. [2023-08-27 12:09:27,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 129 transitions, 1594 flow [2023-08-27 12:09:27,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 129 transitions, 1489 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-27 12:09:27,907 INFO L231 Difference]: Finished difference. Result has 90 places, 119 transitions, 1307 flow [2023-08-27 12:09:27,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=90, PETRI_TRANSITIONS=119} [2023-08-27 12:09:27,908 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-08-27 12:09:27,908 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 119 transitions, 1307 flow [2023-08-27 12:09:27,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.9047619047619) internal successors, (2329), 21 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states 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 12:09:27,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:27,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:27,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 12:09:28,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 12:09:28,115 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:28,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1076416482, now seen corresponding path program 6 times [2023-08-27 12:09:28,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:28,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277596028] [2023-08-27 12:09:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:28,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:28,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:28,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277596028] [2023-08-27 12:09:28,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277596028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:28,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101749267] [2023-08-27 12:09:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:09:28,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:28,609 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 12:09:28,629 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 12:09:28,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 12:09:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:28,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 12:09:28,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:29,014 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 12:09:29,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2023-08-27 12:09:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:29,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:29,228 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-27 12:09:29,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 143 [2023-08-27 12:09:29,240 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:29,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 58 [2023-08-27 12:09:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:29,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101749267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:29,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:29,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-27 12:09:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905447697] [2023-08-27 12:09:29,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 12:09:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 12:09:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=561, Unknown=2, NotChecked=0, Total=650 [2023-08-27 12:09:29,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 374 [2023-08-27 12:09:29,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 119 transitions, 1307 flow. Second operand has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states 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 12:09:29,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:29,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 374 [2023-08-27 12:09:29,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:30,300 INFO L124 PetriNetUnfolderBase]: 1279/2423 cut-off events. [2023-08-27 12:09:30,301 INFO L125 PetriNetUnfolderBase]: For 12600/12600 co-relation queries the response was YES. [2023-08-27 12:09:30,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11504 conditions, 2423 events. 1279/2423 cut-off events. For 12600/12600 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14616 event pairs, 210 based on Foata normal form. 66/2489 useless extension candidates. Maximal degree in co-relation 11475. Up to 1811 conditions per place. [2023-08-27 12:09:30,313 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 77 selfloop transitions, 56 changer transitions 0/133 dead transitions. [2023-08-27 12:09:30,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1664 flow [2023-08-27 12:09:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 12:09:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 12:09:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 931 transitions. [2023-08-27 12:09:30,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2765894236482472 [2023-08-27 12:09:30,316 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 931 transitions. [2023-08-27 12:09:30,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 931 transitions. [2023-08-27 12:09:30,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:30,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 931 transitions. [2023-08-27 12:09:30,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.44444444444444) internal successors, (931), 9 states have internal predecessors, (931), 0 states have call successors, (0), 0 states 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 12:09:30,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:09:30,320 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:09:30,320 INFO L175 Difference]: Start difference. First operand has 90 places, 119 transitions, 1307 flow. Second operand 9 states and 931 transitions. [2023-08-27 12:09:30,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1664 flow [2023-08-27 12:09:30,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 133 transitions, 1574 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 12:09:30,370 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 1357 flow [2023-08-27 12:09:30,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=95, PETRI_TRANSITIONS=119} [2023-08-27 12:09:30,371 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2023-08-27 12:09:30,371 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 1357 flow [2023-08-27 12:09:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.65384615384616) internal successors, (2617), 26 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states 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 12:09:30,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:30,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:30,382 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 12:09:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 12:09:30,580 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:30,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2095851509, now seen corresponding path program 1 times [2023-08-27 12:09:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429639702] [2023-08-27 12:09:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:30,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429639702] [2023-08-27 12:09:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429639702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886109617] [2023-08-27 12:09:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:30,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:30,669 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 12:09:30,677 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 12:09:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:30,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 12:09:30,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:30,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886109617] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:30,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:30,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-27 12:09:30,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310830123] [2023-08-27 12:09:30,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 12:09:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 12:09:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-27 12:09:30,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 374 [2023-08-27 12:09:30,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 119 transitions, 1357 flow. Second operand has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 12:09:30,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:30,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 374 [2023-08-27 12:09:30,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:31,234 INFO L124 PetriNetUnfolderBase]: 1621/3086 cut-off events. [2023-08-27 12:09:31,235 INFO L125 PetriNetUnfolderBase]: For 16733/16733 co-relation queries the response was YES. [2023-08-27 12:09:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14827 conditions, 3086 events. 1621/3086 cut-off events. For 16733/16733 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18906 event pairs, 324 based on Foata normal form. 15/3101 useless extension candidates. Maximal degree in co-relation 14797. Up to 1885 conditions per place. [2023-08-27 12:09:31,250 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 124 selfloop transitions, 35 changer transitions 14/173 dead transitions. [2023-08-27 12:09:31,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 173 transitions, 2045 flow [2023-08-27 12:09:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 12:09:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 12:09:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1139 transitions. [2023-08-27 12:09:31,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2023-08-27 12:09:31,252 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1139 transitions. [2023-08-27 12:09:31,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1139 transitions. [2023-08-27 12:09:31,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:31,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1139 transitions. [2023-08-27 12:09:31,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:09:31,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 12:09:31,255 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 12:09:31,255 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 1357 flow. Second operand 7 states and 1139 transitions. [2023-08-27 12:09:31,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 173 transitions, 2045 flow [2023-08-27 12:09:31,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 173 transitions, 1922 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-27 12:09:31,278 INFO L231 Difference]: Finished difference. Result has 96 places, 124 transitions, 1246 flow [2023-08-27 12:09:31,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=96, PETRI_TRANSITIONS=124} [2023-08-27 12:09:31,278 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2023-08-27 12:09:31,279 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 124 transitions, 1246 flow [2023-08-27 12:09:31,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 12:09:31,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:31,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:31,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 12:09:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:31,485 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:31,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -785401653, now seen corresponding path program 2 times [2023-08-27 12:09:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:31,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228298466] [2023-08-27 12:09:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:31,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:31,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228298466] [2023-08-27 12:09:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228298466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869852515] [2023-08-27 12:09:31,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:31,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:31,579 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 12:09:31,581 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 12:09:31,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:09:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:31,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 12:09:31,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 12:09:31,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:31,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869852515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:31,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:31,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-27 12:09:31,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401084844] [2023-08-27 12:09:31,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:31,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 12:09:31,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 12:09:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-27 12:09:31,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 374 [2023-08-27 12:09:31,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 124 transitions, 1246 flow. Second operand has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 12:09:31,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:31,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 374 [2023-08-27 12:09:31,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:32,136 INFO L124 PetriNetUnfolderBase]: 1770/3341 cut-off events. [2023-08-27 12:09:32,136 INFO L125 PetriNetUnfolderBase]: For 16815/16815 co-relation queries the response was YES. [2023-08-27 12:09:32,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15806 conditions, 3341 events. 1770/3341 cut-off events. For 16815/16815 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20303 event pairs, 483 based on Foata normal form. 15/3356 useless extension candidates. Maximal degree in co-relation 15774. Up to 2324 conditions per place. [2023-08-27 12:09:32,152 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 126 selfloop transitions, 37 changer transitions 16/179 dead transitions. [2023-08-27 12:09:32,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 179 transitions, 2046 flow [2023-08-27 12:09:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 12:09:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 12:09:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1134 transitions. [2023-08-27 12:09:32,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43315508021390375 [2023-08-27 12:09:32,154 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1134 transitions. [2023-08-27 12:09:32,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1134 transitions. [2023-08-27 12:09:32,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:32,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1134 transitions. [2023-08-27 12:09:32,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.0) internal successors, (1134), 7 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states 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 12:09:32,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 12:09:32,158 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 374.0) internal successors, (2992), 8 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 12:09:32,158 INFO L175 Difference]: Start difference. First operand has 96 places, 124 transitions, 1246 flow. Second operand 7 states and 1134 transitions. [2023-08-27 12:09:32,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 179 transitions, 2046 flow [2023-08-27 12:09:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 179 transitions, 2024 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 12:09:32,186 INFO L231 Difference]: Finished difference. Result has 104 places, 133 transitions, 1409 flow [2023-08-27 12:09:32,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1409, PETRI_PLACES=104, PETRI_TRANSITIONS=133} [2023-08-27 12:09:32,186 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2023-08-27 12:09:32,186 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 133 transitions, 1409 flow [2023-08-27 12:09:32,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 12:09:32,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:32,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:32,210 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 12:09:32,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:32,393 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:32,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:32,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2093429694, now seen corresponding path program 3 times [2023-08-27 12:09:32,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:32,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162091163] [2023-08-27 12:09:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:32,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:09:32,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162091163] [2023-08-27 12:09:32,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162091163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:32,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131557970] [2023-08-27 12:09:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:09:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:32,477 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 12:09:32,479 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 12:09:32,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 12:09:32,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:32,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 12:09:32,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:09:32,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:09:32,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131557970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:32,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:32,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 12:09:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694145397] [2023-08-27 12:09:32,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:32,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 12:09:32,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 12:09:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-08-27 12:09:32,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:09:32,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 133 transitions, 1409 flow. Second operand has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 12:09:32,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:32,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:09:32,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:33,040 INFO L124 PetriNetUnfolderBase]: 1537/2875 cut-off events. [2023-08-27 12:09:33,040 INFO L125 PetriNetUnfolderBase]: For 16492/16492 co-relation queries the response was YES. [2023-08-27 12:09:33,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14257 conditions, 2875 events. 1537/2875 cut-off events. For 16492/16492 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16897 event pairs, 1007 based on Foata normal form. 20/2895 useless extension candidates. Maximal degree in co-relation 14221. Up to 2704 conditions per place. [2023-08-27 12:09:33,051 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 120 selfloop transitions, 3 changer transitions 53/176 dead transitions. [2023-08-27 12:09:33,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 176 transitions, 2025 flow [2023-08-27 12:09:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 12:09:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 12:09:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 829 transitions. [2023-08-27 12:09:33,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694295900178253 [2023-08-27 12:09:33,053 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 829 transitions. [2023-08-27 12:09:33,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 829 transitions. [2023-08-27 12:09:33,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:33,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 829 transitions. [2023-08-27 12:09:33,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.16666666666666) internal successors, (829), 6 states have internal predecessors, (829), 0 states have call successors, (0), 0 states 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 12:09:33,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:33,056 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 374.0) internal successors, (2618), 7 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states 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 12:09:33,056 INFO L175 Difference]: Start difference. First operand has 104 places, 133 transitions, 1409 flow. Second operand 6 states and 829 transitions. [2023-08-27 12:09:33,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 176 transitions, 2025 flow [2023-08-27 12:09:33,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 176 transitions, 1906 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-27 12:09:33,073 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 1155 flow [2023-08-27 12:09:33,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1155, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2023-08-27 12:09:33,074 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-08-27 12:09:33,074 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 1155 flow [2023-08-27 12:09:33,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 134.0) internal successors, (1608), 12 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 12:09:33,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:33,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:33,081 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 12:09:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:33,281 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:33,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1415253010, now seen corresponding path program 4 times [2023-08-27 12:09:33,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:33,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996362189] [2023-08-27 12:09:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:33,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996362189] [2023-08-27 12:09:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996362189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560897373] [2023-08-27 12:09:33,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:09:33,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:33,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:33,439 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 12:09:33,441 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 12:09:33,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:09:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:33,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 12:09:33,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:33,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:33,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560897373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:33,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:33,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-27 12:09:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324309430] [2023-08-27 12:09:33,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:33,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 12:09:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 12:09:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-08-27 12:09:33,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 374 [2023-08-27 12:09:33,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 1155 flow. Second operand has 22 states, 22 states have (on average 130.0) internal successors, (2860), 22 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states 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 12:09:33,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:33,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 374 [2023-08-27 12:09:33,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:34,157 INFO L124 PetriNetUnfolderBase]: 1302/2399 cut-off events. [2023-08-27 12:09:34,158 INFO L125 PetriNetUnfolderBase]: For 11873/11873 co-relation queries the response was YES. [2023-08-27 12:09:34,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11866 conditions, 2399 events. 1302/2399 cut-off events. For 11873/11873 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13359 event pairs, 350 based on Foata normal form. 68/2467 useless extension candidates. Maximal degree in co-relation 11830. Up to 855 conditions per place. [2023-08-27 12:09:34,169 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 112 selfloop transitions, 57 changer transitions 0/169 dead transitions. [2023-08-27 12:09:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 169 transitions, 1814 flow [2023-08-27 12:09:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 12:09:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 12:09:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1460 transitions. [2023-08-27 12:09:34,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35488575595527466 [2023-08-27 12:09:34,171 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1460 transitions. [2023-08-27 12:09:34,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1460 transitions. [2023-08-27 12:09:34,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:34,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1460 transitions. [2023-08-27 12:09:34,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.72727272727272) internal successors, (1460), 11 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:09:34,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 374.0) internal successors, (4488), 12 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states 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 12:09:34,175 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 374.0) internal successors, (4488), 12 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states 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 12:09:34,175 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 1155 flow. Second operand 11 states and 1460 transitions. [2023-08-27 12:09:34,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 169 transitions, 1814 flow [2023-08-27 12:09:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 1767 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-27 12:09:34,192 INFO L231 Difference]: Finished difference. Result has 103 places, 124 transitions, 1278 flow [2023-08-27 12:09:34,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1278, PETRI_PLACES=103, PETRI_TRANSITIONS=124} [2023-08-27 12:09:34,192 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-08-27 12:09:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 124 transitions, 1278 flow [2023-08-27 12:09:34,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 130.0) internal successors, (2860), 22 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states 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 12:09:34,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:34,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:34,200 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 12:09:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:34,398 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:34,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1481007496, now seen corresponding path program 5 times [2023-08-27 12:09:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:34,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188391828] [2023-08-27 12:09:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:34,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:34,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188391828] [2023-08-27 12:09:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188391828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:34,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690921641] [2023-08-27 12:09:34,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:09:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:34,941 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 12:09:34,943 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 12:09:35,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 12:09:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:35,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 12:09:35,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:09:35,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:35,522 INFO L322 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-08-27 12:09:35,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 183 [2023-08-27 12:09:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:09:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690921641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:36,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:36,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-08-27 12:09:36,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331156500] [2023-08-27 12:09:36,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 12:09:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 12:09:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-08-27 12:09:36,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:09:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 124 transitions, 1278 flow. Second operand has 25 states, 25 states have (on average 107.16) internal successors, (2679), 25 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 12:09:36,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:36,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:09:36,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:37,036 INFO L124 PetriNetUnfolderBase]: 1541/2834 cut-off events. [2023-08-27 12:09:37,036 INFO L125 PetriNetUnfolderBase]: For 15331/15331 co-relation queries the response was YES. [2023-08-27 12:09:37,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14494 conditions, 2834 events. 1541/2834 cut-off events. For 15331/15331 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 16141 event pairs, 228 based on Foata normal form. 54/2888 useless extension candidates. Maximal degree in co-relation 14459. Up to 1599 conditions per place. [2023-08-27 12:09:37,047 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 131 selfloop transitions, 77 changer transitions 1/209 dead transitions. [2023-08-27 12:09:37,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 209 transitions, 2324 flow [2023-08-27 12:09:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 12:09:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 12:09:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1996 transitions. [2023-08-27 12:09:37,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2964943553178847 [2023-08-27 12:09:37,050 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1996 transitions. [2023-08-27 12:09:37,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1996 transitions. [2023-08-27 12:09:37,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:37,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1996 transitions. [2023-08-27 12:09:37,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 110.88888888888889) internal successors, (1996), 18 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states 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 12:09:37,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 374.0) internal successors, (7106), 19 states have internal predecessors, (7106), 0 states have call successors, (0), 0 states 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 12:09:37,055 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 374.0) internal successors, (7106), 19 states have internal predecessors, (7106), 0 states have call successors, (0), 0 states 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 12:09:37,055 INFO L175 Difference]: Start difference. First operand has 103 places, 124 transitions, 1278 flow. Second operand 18 states and 1996 transitions. [2023-08-27 12:09:37,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 209 transitions, 2324 flow [2023-08-27 12:09:37,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 209 transitions, 2189 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-27 12:09:37,075 INFO L231 Difference]: Finished difference. Result has 118 places, 149 transitions, 1625 flow [2023-08-27 12:09:37,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1625, PETRI_PLACES=118, PETRI_TRANSITIONS=149} [2023-08-27 12:09:37,076 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2023-08-27 12:09:37,076 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 149 transitions, 1625 flow [2023-08-27 12:09:37,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.16) internal successors, (2679), 25 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 12:09:37,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:37,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:37,083 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 12:09:37,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:37,281 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:37,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:37,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1712392845, now seen corresponding path program 1 times [2023-08-27 12:09:37,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:37,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815297293] [2023-08-27 12:09:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:37,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:09:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815297293] [2023-08-27 12:09:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815297293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384973507] [2023-08-27 12:09:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:37,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:37,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:37,551 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 12:09:37,577 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 12:09:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:37,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 12:09:37,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:09:37,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:37,951 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:09:37,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:09:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:09:37,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384973507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:37,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:37,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 19 [2023-08-27 12:09:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222542533] [2023-08-27 12:09:37,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 12:09:37,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 12:09:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-27 12:09:37,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:09:37,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 149 transitions, 1625 flow. Second operand has 20 states, 20 states have (on average 121.6) internal successors, (2432), 20 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 12:09:37,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:37,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:09:37,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:38,651 INFO L124 PetriNetUnfolderBase]: 1557/2905 cut-off events. [2023-08-27 12:09:38,651 INFO L125 PetriNetUnfolderBase]: For 21902/21902 co-relation queries the response was YES. [2023-08-27 12:09:38,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16923 conditions, 2905 events. 1557/2905 cut-off events. For 21902/21902 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 16936 event pairs, 422 based on Foata normal form. 20/2925 useless extension candidates. Maximal degree in co-relation 16881. Up to 2103 conditions per place. [2023-08-27 12:09:38,668 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 128 selfloop transitions, 55 changer transitions 22/205 dead transitions. [2023-08-27 12:09:38,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 205 transitions, 2420 flow [2023-08-27 12:09:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 12:09:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 12:09:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1638 transitions. [2023-08-27 12:09:38,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33689839572192515 [2023-08-27 12:09:38,670 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1638 transitions. [2023-08-27 12:09:38,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1638 transitions. [2023-08-27 12:09:38,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:38,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1638 transitions. [2023-08-27 12:09:38,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.0) internal successors, (1638), 13 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states 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 12:09:38,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:09:38,676 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:09:38,676 INFO L175 Difference]: Start difference. First operand has 118 places, 149 transitions, 1625 flow. Second operand 13 states and 1638 transitions. [2023-08-27 12:09:38,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 205 transitions, 2420 flow [2023-08-27 12:09:38,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 205 transitions, 2268 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-08-27 12:09:38,718 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1611 flow [2023-08-27 12:09:38,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1611, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2023-08-27 12:09:38,718 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2023-08-27 12:09:38,718 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1611 flow [2023-08-27 12:09:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.6) internal successors, (2432), 20 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 12:09:38,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:38,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:38,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 12:09:38,924 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,SelfDestructingSolverStorable34 [2023-08-27 12:09:38,925 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:38,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:38,925 INFO L85 PathProgramCache]: Analyzing trace with hash 884275361, now seen corresponding path program 2 times [2023-08-27 12:09:38,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:38,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413350668] [2023-08-27 12:09:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:38,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:09:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413350668] [2023-08-27 12:09:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413350668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108138348] [2023-08-27 12:09:39,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:09:39,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:39,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:39,240 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 12:09:39,243 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 12:09:39,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:09:39,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:39,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 12:09:39,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:39,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 12:09:39,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:39,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:09:39,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:39,988 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:39,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-27 12:09:40,032 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:09:40,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 860 treesize of output 776 [2023-08-27 12:09:40,045 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:40,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:40,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 566 [2023-08-27 12:09:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:40,081 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:40,100 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:40,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 516 treesize of output 462 [2023-08-27 12:09:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:09:41,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108138348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:09:41,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:09:41,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 30 [2023-08-27 12:09:41,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41721112] [2023-08-27 12:09:41,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:09:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 12:09:41,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:09:41,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 12:09:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=800, Unknown=6, NotChecked=0, Total=930 [2023-08-27 12:09:41,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 374 [2023-08-27 12:09:41,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1611 flow. Second operand has 31 states, 31 states have (on average 101.7741935483871) internal successors, (3155), 31 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 12:09:41,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:09:41,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 374 [2023-08-27 12:09:41,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:09:48,689 INFO L124 PetriNetUnfolderBase]: 3292/6246 cut-off events. [2023-08-27 12:09:48,689 INFO L125 PetriNetUnfolderBase]: For 45558/45558 co-relation queries the response was YES. [2023-08-27 12:09:48,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36080 conditions, 6246 events. 3292/6246 cut-off events. For 45558/45558 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 43389 event pairs, 629 based on Foata normal form. 52/6298 useless extension candidates. Maximal degree in co-relation 36036. Up to 2527 conditions per place. [2023-08-27 12:09:48,733 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 297 selfloop transitions, 210 changer transitions 12/519 dead transitions. [2023-08-27 12:09:48,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 519 transitions, 6156 flow [2023-08-27 12:09:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 12:09:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 12:09:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5005 transitions. [2023-08-27 12:09:48,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28473091364205255 [2023-08-27 12:09:48,747 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5005 transitions. [2023-08-27 12:09:48,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5005 transitions. [2023-08-27 12:09:48,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:09:48,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5005 transitions. [2023-08-27 12:09:48,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 106.48936170212765) internal successors, (5005), 47 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states 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 12:09:48,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 374.0) internal successors, (17952), 48 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states 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 12:09:48,761 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 374.0) internal successors, (17952), 48 states have internal predecessors, (17952), 0 states have call successors, (0), 0 states 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 12:09:48,762 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1611 flow. Second operand 47 states and 5005 transitions. [2023-08-27 12:09:48,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 519 transitions, 6156 flow [2023-08-27 12:09:48,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 519 transitions, 5856 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-27 12:09:48,866 INFO L231 Difference]: Finished difference. Result has 176 places, 314 transitions, 4125 flow [2023-08-27 12:09:48,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4125, PETRI_PLACES=176, PETRI_TRANSITIONS=314} [2023-08-27 12:09:48,867 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2023-08-27 12:09:48,867 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 314 transitions, 4125 flow [2023-08-27 12:09:48,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.7741935483871) internal successors, (3155), 31 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states 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 12:09:48,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:09:48,867 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:09:48,875 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 12:09:49,073 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,SelfDestructingSolverStorable35 [2023-08-27 12:09:49,073 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:09:49,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:09:49,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1582768819, now seen corresponding path program 3 times [2023-08-27 12:09:49,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:09:49,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728869524] [2023-08-27 12:09:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:09:49,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:09:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:09:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:09:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:09:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728869524] [2023-08-27 12:09:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728869524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:09:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061559102] [2023-08-27 12:09:49,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:09:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:09:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:09:49,479 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 12:09:49,481 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 12:09:49,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 12:09:49,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:09:49,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 12:09:49,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:09:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:49,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:09:49,627 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-27 12:09:49,630 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-27 12:09:49,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 12:09:49,792 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 12:09:49,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 12:09:49,841 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:49,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:49,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:49,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:09:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:09:50,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:09:51,022 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:51,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2023-08-27 12:09:51,103 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:09:51,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 13804 treesize of output 12768 [2023-08-27 12:09:51,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:51,208 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:51,241 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:51,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3164 treesize of output 2382 [2023-08-27 12:09:51,279 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:51,280 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:51,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:51,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2332 treesize of output 1966 [2023-08-27 12:09:51,337 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:51,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:09:51,360 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:09:51,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1916 treesize of output 1758 [2023-08-27 12:10:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:10:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061559102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:03,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:03,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 31 [2023-08-27 12:10:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808976688] [2023-08-27 12:10:03,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:03,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 12:10:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 12:10:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=850, Unknown=10, NotChecked=0, Total=992 [2023-08-27 12:10:03,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 374 [2023-08-27 12:10:03,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 314 transitions, 4125 flow. Second operand has 32 states, 32 states have (on average 99.8125) internal successors, (3194), 32 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states 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 12:10:03,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:03,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 374 [2023-08-27 12:10:03,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:09,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 12:10:11,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 12:10:13,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 12:10:14,796 INFO L124 PetriNetUnfolderBase]: 3830/7336 cut-off events. [2023-08-27 12:10:14,796 INFO L125 PetriNetUnfolderBase]: For 95057/95057 co-relation queries the response was YES. [2023-08-27 12:10:14,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47938 conditions, 7336 events. 3830/7336 cut-off events. For 95057/95057 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 53516 event pairs, 782 based on Foata normal form. 84/7420 useless extension candidates. Maximal degree in co-relation 47876. Up to 3174 conditions per place. [2023-08-27 12:10:14,848 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 231 selfloop transitions, 231 changer transitions 16/478 dead transitions. [2023-08-27 12:10:14,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 478 transitions, 6784 flow [2023-08-27 12:10:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 12:10:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 12:10:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3326 transitions. [2023-08-27 12:10:14,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2779077540106952 [2023-08-27 12:10:14,851 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3326 transitions. [2023-08-27 12:10:14,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3326 transitions. [2023-08-27 12:10:14,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:14,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3326 transitions. [2023-08-27 12:10:14,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 103.9375) internal successors, (3326), 32 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states 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 12:10:14,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 374.0) internal successors, (12342), 33 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states 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 12:10:14,861 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 374.0) internal successors, (12342), 33 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states 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 12:10:14,861 INFO L175 Difference]: Start difference. First operand has 176 places, 314 transitions, 4125 flow. Second operand 32 states and 3326 transitions. [2023-08-27 12:10:14,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 478 transitions, 6784 flow [2023-08-27 12:10:15,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 478 transitions, 6428 flow, removed 88 selfloop flow, removed 11 redundant places. [2023-08-27 12:10:15,142 INFO L231 Difference]: Finished difference. Result has 202 places, 357 transitions, 5226 flow [2023-08-27 12:10:15,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=3705, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5226, PETRI_PLACES=202, PETRI_TRANSITIONS=357} [2023-08-27 12:10:15,143 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 173 predicate places. [2023-08-27 12:10:15,143 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 357 transitions, 5226 flow [2023-08-27 12:10:15,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.8125) internal successors, (3194), 32 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states 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 12:10:15,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:15,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:15,149 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 12:10:15,349 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,SelfDestructingSolverStorable36 [2023-08-27 12:10:15,350 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:15,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1360209544, now seen corresponding path program 6 times [2023-08-27 12:10:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120735527] [2023-08-27 12:10:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:15,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:15,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120735527] [2023-08-27 12:10:15,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120735527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:15,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775948754] [2023-08-27 12:10:15,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:10:15,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:15,889 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 12:10:15,891 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 12:10:16,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 12:10:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:16,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 12:10:16,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:16,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:16,698 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:10:16,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:10:16,714 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:10:16,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:10:16,720 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:10:16,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:10:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:16,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775948754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:16,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:16,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2023-08-27 12:10:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064471395] [2023-08-27 12:10:16,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:16,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 12:10:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:16,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 12:10:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-08-27 12:10:16,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:10:16,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 357 transitions, 5226 flow. Second operand has 29 states, 29 states have (on average 106.62068965517241) internal successors, (3092), 29 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states 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 12:10:16,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:16,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:10:16,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:18,523 INFO L124 PetriNetUnfolderBase]: 3732/7103 cut-off events. [2023-08-27 12:10:18,523 INFO L125 PetriNetUnfolderBase]: For 96062/96062 co-relation queries the response was YES. [2023-08-27 12:10:18,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48428 conditions, 7103 events. 3732/7103 cut-off events. For 96062/96062 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 50676 event pairs, 1434 based on Foata normal form. 8/7111 useless extension candidates. Maximal degree in co-relation 48360. Up to 6687 conditions per place. [2023-08-27 12:10:18,566 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 285 selfloop transitions, 82 changer transitions 2/369 dead transitions. [2023-08-27 12:10:18,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 369 transitions, 6022 flow [2023-08-27 12:10:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 12:10:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 12:10:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1525 transitions. [2023-08-27 12:10:18,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2912528647822765 [2023-08-27 12:10:18,568 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1525 transitions. [2023-08-27 12:10:18,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1525 transitions. [2023-08-27 12:10:18,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:18,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1525 transitions. [2023-08-27 12:10:18,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 108.92857142857143) internal successors, (1525), 14 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 12:10:18,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:10:18,572 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:10:18,572 INFO L175 Difference]: Start difference. First operand has 202 places, 357 transitions, 5226 flow. Second operand 14 states and 1525 transitions. [2023-08-27 12:10:18,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 369 transitions, 6022 flow [2023-08-27 12:10:19,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 369 transitions, 5668 flow, removed 134 selfloop flow, removed 11 redundant places. [2023-08-27 12:10:19,029 INFO L231 Difference]: Finished difference. Result has 201 places, 357 transitions, 5050 flow [2023-08-27 12:10:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=4872, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5050, PETRI_PLACES=201, PETRI_TRANSITIONS=357} [2023-08-27 12:10:19,030 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2023-08-27 12:10:19,030 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 357 transitions, 5050 flow [2023-08-27 12:10:19,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 106.62068965517241) internal successors, (3092), 29 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states 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 12:10:19,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:19,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:19,038 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 12:10:19,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:19,235 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:19,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -500145722, now seen corresponding path program 7 times [2023-08-27 12:10:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103153822] [2023-08-27 12:10:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:19,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103153822] [2023-08-27 12:10:19,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103153822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733726506] [2023-08-27 12:10:19,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:10:19,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:19,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:19,777 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 12:10:19,779 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 12:10:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:19,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 12:10:19,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:20,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:20,666 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:10:20,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:10:20,717 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:10:20,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:10:20,740 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:10:20,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:10:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733726506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:21,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:21,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-27 12:10:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865542033] [2023-08-27 12:10:21,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:21,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 12:10:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 12:10:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 12:10:21,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:10:21,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 357 transitions, 5050 flow. Second operand has 33 states, 33 states have (on average 106.6969696969697) internal successors, (3521), 33 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states 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 12:10:21,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:21,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:10:21,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:22,767 INFO L124 PetriNetUnfolderBase]: 3716/7055 cut-off events. [2023-08-27 12:10:22,768 INFO L125 PetriNetUnfolderBase]: For 74736/74736 co-relation queries the response was YES. [2023-08-27 12:10:22,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46880 conditions, 7055 events. 3716/7055 cut-off events. For 74736/74736 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 49858 event pairs, 1306 based on Foata normal form. 60/7115 useless extension candidates. Maximal degree in co-relation 46813. Up to 6475 conditions per place. [2023-08-27 12:10:22,808 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 297 selfloop transitions, 108 changer transitions 6/411 dead transitions. [2023-08-27 12:10:22,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 411 transitions, 6444 flow [2023-08-27 12:10:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 12:10:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 12:10:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1866 transitions. [2023-08-27 12:10:22,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29348851840201323 [2023-08-27 12:10:22,814 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1866 transitions. [2023-08-27 12:10:22,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1866 transitions. [2023-08-27 12:10:22,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:22,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1866 transitions. [2023-08-27 12:10:22,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 109.76470588235294) internal successors, (1866), 17 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states 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 12:10:22,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:10:22,836 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:10:22,836 INFO L175 Difference]: Start difference. First operand has 201 places, 357 transitions, 5050 flow. Second operand 17 states and 1866 transitions. [2023-08-27 12:10:22,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 411 transitions, 6444 flow [2023-08-27 12:10:23,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 411 transitions, 6250 flow, removed 5 selfloop flow, removed 12 redundant places. [2023-08-27 12:10:23,084 INFO L231 Difference]: Finished difference. Result has 205 places, 368 transitions, 5301 flow [2023-08-27 12:10:23,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5301, PETRI_PLACES=205, PETRI_TRANSITIONS=368} [2023-08-27 12:10:23,085 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2023-08-27 12:10:23,085 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 368 transitions, 5301 flow [2023-08-27 12:10:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 106.6969696969697) internal successors, (3521), 33 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states 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 12:10:23,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:23,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:23,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 12:10:23,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 12:10:23,290 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:23,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1538033299, now seen corresponding path program 4 times [2023-08-27 12:10:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:23,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46988133] [2023-08-27 12:10:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:23,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:23,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46988133] [2023-08-27 12:10:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46988133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:23,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145293320] [2023-08-27 12:10:23,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:10:23,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:23,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:23,633 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 12:10:23,681 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 12:10:23,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:10:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:23,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 12:10:23,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:10:23,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:24,092 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:10:24,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:10:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:10:24,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145293320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:24,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:24,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 5] total 17 [2023-08-27 12:10:24,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505416005] [2023-08-27 12:10:24,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:24,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 12:10:24,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 12:10:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-27 12:10:24,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:10:24,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 368 transitions, 5301 flow. Second operand has 18 states, 18 states have (on average 121.33333333333333) internal successors, (2184), 18 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 12:10:24,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:24,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:10:24,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:25,556 INFO L124 PetriNetUnfolderBase]: 3727/7105 cut-off events. [2023-08-27 12:10:25,557 INFO L125 PetriNetUnfolderBase]: For 88091/88091 co-relation queries the response was YES. [2023-08-27 12:10:25,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48656 conditions, 7105 events. 3727/7105 cut-off events. For 88091/88091 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 50922 event pairs, 978 based on Foata normal form. 64/7169 useless extension candidates. Maximal degree in co-relation 48588. Up to 4312 conditions per place. [2023-08-27 12:10:25,604 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 232 selfloop transitions, 185 changer transitions 17/434 dead transitions. [2023-08-27 12:10:25,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 434 transitions, 6803 flow [2023-08-27 12:10:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 12:10:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 12:10:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1640 transitions. [2023-08-27 12:10:25,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33730974907445493 [2023-08-27 12:10:25,606 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1640 transitions. [2023-08-27 12:10:25,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1640 transitions. [2023-08-27 12:10:25,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:25,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1640 transitions. [2023-08-27 12:10:25,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.15384615384616) internal successors, (1640), 13 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states 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 12:10:25,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:10:25,610 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:10:25,610 INFO L175 Difference]: Start difference. First operand has 205 places, 368 transitions, 5301 flow. Second operand 13 states and 1640 transitions. [2023-08-27 12:10:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 434 transitions, 6803 flow [2023-08-27 12:10:25,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 434 transitions, 6584 flow, removed 17 selfloop flow, removed 12 redundant places. [2023-08-27 12:10:25,956 INFO L231 Difference]: Finished difference. Result has 208 places, 388 transitions, 5872 flow [2023-08-27 12:10:25,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5872, PETRI_PLACES=208, PETRI_TRANSITIONS=388} [2023-08-27 12:10:25,957 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 179 predicate places. [2023-08-27 12:10:25,957 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 388 transitions, 5872 flow [2023-08-27 12:10:25,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.33333333333333) internal successors, (2184), 18 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 12:10:25,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:25,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:25,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-27 12:10:26,162 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,SelfDestructingSolverStorable39 [2023-08-27 12:10:26,162 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:26,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash 868788635, now seen corresponding path program 5 times [2023-08-27 12:10:26,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:26,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657178221] [2023-08-27 12:10:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:26,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:26,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657178221] [2023-08-27 12:10:26,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657178221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475313574] [2023-08-27 12:10:26,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:10:26,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:26,518 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 12:10:26,520 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 12:10:26,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:10:26,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:26,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 12:10:26,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:10:26,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:26,902 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:10:26,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:10:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:10:26,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475313574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:26,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 14 [2023-08-27 12:10:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252464923] [2023-08-27 12:10:26,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:26,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 12:10:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 12:10:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-27 12:10:26,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:10:26,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 388 transitions, 5872 flow. Second operand has 15 states, 15 states have (on average 121.66666666666667) internal successors, (1825), 15 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states 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 12:10:26,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:26,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:10:26,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:28,407 INFO L124 PetriNetUnfolderBase]: 3679/6945 cut-off events. [2023-08-27 12:10:28,407 INFO L125 PetriNetUnfolderBase]: For 94393/94393 co-relation queries the response was YES. [2023-08-27 12:10:28,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 6945 events. 3679/6945 cut-off events. For 94393/94393 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 49000 event pairs, 985 based on Foata normal form. 32/6977 useless extension candidates. Maximal degree in co-relation 49032. Up to 4248 conditions per place. [2023-08-27 12:10:28,457 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 239 selfloop transitions, 192 changer transitions 3/434 dead transitions. [2023-08-27 12:10:28,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 434 transitions, 7160 flow [2023-08-27 12:10:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 12:10:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 12:10:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1636 transitions. [2023-08-27 12:10:28,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3364870423693953 [2023-08-27 12:10:28,459 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1636 transitions. [2023-08-27 12:10:28,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1636 transitions. [2023-08-27 12:10:28,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:28,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1636 transitions. [2023-08-27 12:10:28,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 125.84615384615384) internal successors, (1636), 13 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states 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 12:10:28,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:10:28,463 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:10:28,463 INFO L175 Difference]: Start difference. First operand has 208 places, 388 transitions, 5872 flow. Second operand 13 states and 1636 transitions. [2023-08-27 12:10:28,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 434 transitions, 7160 flow [2023-08-27 12:10:28,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 434 transitions, 6774 flow, removed 11 selfloop flow, removed 8 redundant places. [2023-08-27 12:10:28,749 INFO L231 Difference]: Finished difference. Result has 212 places, 391 transitions, 5955 flow [2023-08-27 12:10:28,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=5486, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5955, PETRI_PLACES=212, PETRI_TRANSITIONS=391} [2023-08-27 12:10:28,750 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2023-08-27 12:10:28,750 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 391 transitions, 5955 flow [2023-08-27 12:10:28,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 121.66666666666667) internal successors, (1825), 15 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states 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 12:10:28,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:28,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:28,758 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 12:10:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:28,956 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:28,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash -647764371, now seen corresponding path program 6 times [2023-08-27 12:10:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:28,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275929570] [2023-08-27 12:10:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:28,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:29,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:29,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275929570] [2023-08-27 12:10:29,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275929570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:29,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603915926] [2023-08-27 12:10:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:10:29,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:29,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:29,249 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 12:10:29,277 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 12:10:29,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 12:10:29,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:29,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-27 12:10:29,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:29,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:10:29,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:10:29,474 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-27 12:10:29,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-27 12:10:29,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 12:10:29,602 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 12:10:29,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 12:10:29,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:10:29,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 12:10:29,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:10:29,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:10:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:29,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:30,376 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:10:30,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 89 [2023-08-27 12:10:30,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:10:30,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 90 [2023-08-27 12:10:30,590 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 12:10:30,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6828 treesize of output 6561 [2023-08-27 12:10:30,681 INFO L322 Elim1Store]: treesize reduction 20, result has 71.8 percent of original size [2023-08-27 12:10:30,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1624 treesize of output 1258 [2023-08-27 12:10:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:10:30,706 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:10:30,729 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:10:30,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1208 treesize of output 1102 [2023-08-27 12:10:30,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:10:30,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:10:30,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:10:30,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1052 treesize of output 894 [2023-08-27 12:10:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603915926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:34,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:34,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2023-08-27 12:10:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905811918] [2023-08-27 12:10:34,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 12:10:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 12:10:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=868, Unknown=27, NotChecked=0, Total=1056 [2023-08-27 12:10:34,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 374 [2023-08-27 12:10:34,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 391 transitions, 5955 flow. Second operand has 33 states, 33 states have (on average 98.6969696969697) internal successors, (3257), 33 states have internal predecessors, (3257), 0 states have call successors, (0), 0 states 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 12:10:34,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 374 [2023-08-27 12:10:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:37,278 INFO L124 PetriNetUnfolderBase]: 4007/7561 cut-off events. [2023-08-27 12:10:37,279 INFO L125 PetriNetUnfolderBase]: For 106657/106657 co-relation queries the response was YES. [2023-08-27 12:10:37,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53630 conditions, 7561 events. 4007/7561 cut-off events. For 106657/106657 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 54543 event pairs, 567 based on Foata normal form. 32/7593 useless extension candidates. Maximal degree in co-relation 53556. Up to 3454 conditions per place. [2023-08-27 12:10:37,338 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 331 selfloop transitions, 260 changer transitions 5/596 dead transitions. [2023-08-27 12:10:37,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 596 transitions, 9420 flow [2023-08-27 12:10:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 12:10:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 12:10:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2382 transitions. [2023-08-27 12:10:37,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2769123459660544 [2023-08-27 12:10:37,341 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2382 transitions. [2023-08-27 12:10:37,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2382 transitions. [2023-08-27 12:10:37,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:37,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2382 transitions. [2023-08-27 12:10:37,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 103.56521739130434) internal successors, (2382), 23 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states 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 12:10:37,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 374.0) internal successors, (8976), 24 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states 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 12:10:37,348 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 374.0) internal successors, (8976), 24 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states 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 12:10:37,348 INFO L175 Difference]: Start difference. First operand has 212 places, 391 transitions, 5955 flow. Second operand 23 states and 2382 transitions. [2023-08-27 12:10:37,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 596 transitions, 9420 flow [2023-08-27 12:10:37,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 596 transitions, 8951 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-08-27 12:10:37,787 INFO L231 Difference]: Finished difference. Result has 233 places, 461 transitions, 7335 flow [2023-08-27 12:10:37,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7335, PETRI_PLACES=233, PETRI_TRANSITIONS=461} [2023-08-27 12:10:37,787 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2023-08-27 12:10:37,788 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 461 transitions, 7335 flow [2023-08-27 12:10:37,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 98.6969696969697) internal successors, (3257), 33 states have internal predecessors, (3257), 0 states have call successors, (0), 0 states 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 12:10:37,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:37,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:37,793 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 12:10:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:37,993 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:37,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1128712474, now seen corresponding path program 8 times [2023-08-27 12:10:37,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134107579] [2023-08-27 12:10:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:38,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134107579] [2023-08-27 12:10:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134107579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748536629] [2023-08-27 12:10:38,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:10:38,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:38,433 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 12:10:38,434 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 12:10:38,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:10:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:38,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 12:10:38,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:38,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:39,016 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-27 12:10:39,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 80 [2023-08-27 12:10:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:39,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748536629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:39,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:39,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-27 12:10:39,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033930827] [2023-08-27 12:10:39,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:39,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 12:10:39,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 12:10:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 12:10:39,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:10:39,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 461 transitions, 7335 flow. Second operand has 33 states, 33 states have (on average 106.6969696969697) internal successors, (3521), 33 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states 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 12:10:39,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:39,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:10:39,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:41,230 INFO L124 PetriNetUnfolderBase]: 4003/7565 cut-off events. [2023-08-27 12:10:41,230 INFO L125 PetriNetUnfolderBase]: For 113207/113207 co-relation queries the response was YES. [2023-08-27 12:10:41,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54821 conditions, 7565 events. 4003/7565 cut-off events. For 113207/113207 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 54612 event pairs, 1518 based on Foata normal form. 8/7573 useless extension candidates. Maximal degree in co-relation 54738. Up to 7049 conditions per place. [2023-08-27 12:10:41,287 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 346 selfloop transitions, 135 changer transitions 7/488 dead transitions. [2023-08-27 12:10:41,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 488 transitions, 8606 flow [2023-08-27 12:10:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 12:10:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 12:10:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1420 transitions. [2023-08-27 12:10:41,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29206088029617444 [2023-08-27 12:10:41,289 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1420 transitions. [2023-08-27 12:10:41,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1420 transitions. [2023-08-27 12:10:41,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:41,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1420 transitions. [2023-08-27 12:10:41,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 109.23076923076923) internal successors, (1420), 13 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states 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 12:10:41,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:10:41,294 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:10:41,294 INFO L175 Difference]: Start difference. First operand has 233 places, 461 transitions, 7335 flow. Second operand 13 states and 1420 transitions. [2023-08-27 12:10:41,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 488 transitions, 8606 flow [2023-08-27 12:10:41,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 488 transitions, 8550 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-27 12:10:41,771 INFO L231 Difference]: Finished difference. Result has 243 places, 470 transitions, 7807 flow [2023-08-27 12:10:41,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=7279, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7807, PETRI_PLACES=243, PETRI_TRANSITIONS=470} [2023-08-27 12:10:41,772 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 214 predicate places. [2023-08-27 12:10:41,772 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 470 transitions, 7807 flow [2023-08-27 12:10:41,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 106.6969696969697) internal successors, (3521), 33 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states 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 12:10:41,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:41,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:41,778 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 12:10:41,978 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,SelfDestructingSolverStorable42 [2023-08-27 12:10:41,978 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:41,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -515632448, now seen corresponding path program 9 times [2023-08-27 12:10:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:41,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146768144] [2023-08-27 12:10:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:41,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:42,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:42,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146768144] [2023-08-27 12:10:42,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146768144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:42,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352274569] [2023-08-27 12:10:42,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:10:42,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:42,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:42,487 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 12:10:42,489 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 12:10:42,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 12:10:42,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:42,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 12:10:42,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:43,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:43,291 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:10:43,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:10:43,314 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:10:43,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:10:43,324 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:10:43,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:10:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:43,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352274569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:43,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:43,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-27 12:10:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456556452] [2023-08-27 12:10:43,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:43,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 12:10:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 12:10:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-08-27 12:10:43,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:10:43,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 470 transitions, 7807 flow. Second operand has 32 states, 32 states have (on average 106.5625) internal successors, (3410), 32 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states 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 12:10:43,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:43,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:10:43,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:45,954 INFO L124 PetriNetUnfolderBase]: 4043/7695 cut-off events. [2023-08-27 12:10:45,954 INFO L125 PetriNetUnfolderBase]: For 125101/125101 co-relation queries the response was YES. [2023-08-27 12:10:46,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56878 conditions, 7695 events. 4043/7695 cut-off events. For 125101/125101 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 55867 event pairs, 1440 based on Foata normal form. 60/7755 useless extension candidates. Maximal degree in co-relation 56793. Up to 6911 conditions per place. [2023-08-27 12:10:46,040 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 354 selfloop transitions, 164 changer transitions 3/521 dead transitions. [2023-08-27 12:10:46,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 521 transitions, 9339 flow [2023-08-27 12:10:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 12:10:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 12:10:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1764 transitions. [2023-08-27 12:10:46,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2947860962566845 [2023-08-27 12:10:46,043 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1764 transitions. [2023-08-27 12:10:46,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1764 transitions. [2023-08-27 12:10:46,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:46,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1764 transitions. [2023-08-27 12:10:46,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 110.25) internal successors, (1764), 16 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states 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 12:10:46,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 374.0) internal successors, (6358), 17 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states 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 12:10:46,047 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 374.0) internal successors, (6358), 17 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states 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 12:10:46,047 INFO L175 Difference]: Start difference. First operand has 243 places, 470 transitions, 7807 flow. Second operand 16 states and 1764 transitions. [2023-08-27 12:10:46,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 521 transitions, 9339 flow [2023-08-27 12:10:46,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 521 transitions, 9085 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-08-27 12:10:46,746 INFO L231 Difference]: Finished difference. Result has 249 places, 477 transitions, 8044 flow [2023-08-27 12:10:46,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=7565, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8044, PETRI_PLACES=249, PETRI_TRANSITIONS=477} [2023-08-27 12:10:46,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 220 predicate places. [2023-08-27 12:10:46,747 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 477 transitions, 8044 flow [2023-08-27 12:10:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 106.5625) internal successors, (3410), 32 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states 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 12:10:46,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:46,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:46,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-27 12:10:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:46,953 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:46,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1375696270, now seen corresponding path program 10 times [2023-08-27 12:10:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266795249] [2023-08-27 12:10:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:46,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266795249] [2023-08-27 12:10:47,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266795249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517124251] [2023-08-27 12:10:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:10:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:47,526 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 12:10:47,527 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 12:10:47,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:10:47,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:47,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 12:10:47,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:48,069 INFO L322 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2023-08-27 12:10:48,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 16 [2023-08-27 12:10:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:48,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:48,404 INFO L322 Elim1Store]: treesize reduction 22, result has 88.0 percent of original size [2023-08-27 12:10:48,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 186 [2023-08-27 12:10:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:48,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517124251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:48,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:48,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-27 12:10:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904189787] [2023-08-27 12:10:48,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 12:10:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 12:10:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 12:10:48,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:10:48,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 477 transitions, 8044 flow. Second operand has 35 states, 35 states have (on average 106.65714285714286) internal successors, (3733), 35 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states 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 12:10:48,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:48,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:10:48,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:52,133 INFO L124 PetriNetUnfolderBase]: 4856/9078 cut-off events. [2023-08-27 12:10:52,133 INFO L125 PetriNetUnfolderBase]: For 154767/154767 co-relation queries the response was YES. [2023-08-27 12:10:52,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68278 conditions, 9078 events. 4856/9078 cut-off events. For 154767/154767 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 67791 event pairs, 580 based on Foata normal form. 16/9094 useless extension candidates. Maximal degree in co-relation 68192. Up to 3275 conditions per place. [2023-08-27 12:10:52,211 INFO L140 encePairwiseOnDemand]: 361/374 looper letters, 337 selfloop transitions, 362 changer transitions 8/707 dead transitions. [2023-08-27 12:10:52,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 707 transitions, 12147 flow [2023-08-27 12:10:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 12:10:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 12:10:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4085 transitions. [2023-08-27 12:10:52,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2952016187310305 [2023-08-27 12:10:52,215 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4085 transitions. [2023-08-27 12:10:52,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4085 transitions. [2023-08-27 12:10:52,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:52,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4085 transitions. [2023-08-27 12:10:52,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 110.4054054054054) internal successors, (4085), 37 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states 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 12:10:52,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 374.0) internal successors, (14212), 38 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states 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 12:10:52,226 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 374.0) internal successors, (14212), 38 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states 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 12:10:52,226 INFO L175 Difference]: Start difference. First operand has 249 places, 477 transitions, 8044 flow. Second operand 37 states and 4085 transitions. [2023-08-27 12:10:52,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 707 transitions, 12147 flow [2023-08-27 12:10:52,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 707 transitions, 11808 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-08-27 12:10:52,822 INFO L231 Difference]: Finished difference. Result has 279 places, 563 transitions, 10027 flow [2023-08-27 12:10:52,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10027, PETRI_PLACES=279, PETRI_TRANSITIONS=563} [2023-08-27 12:10:52,822 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2023-08-27 12:10:52,822 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 563 transitions, 10027 flow [2023-08-27 12:10:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 106.65714285714286) internal successors, (3733), 35 states have internal predecessors, (3733), 0 states have call successors, (0), 0 states 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 12:10:52,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:52,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:52,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-27 12:10:53,028 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,SelfDestructingSolverStorable44 [2023-08-27 12:10:53,028 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:53,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1790617851, now seen corresponding path program 7 times [2023-08-27 12:10:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532226750] [2023-08-27 12:10:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532226750] [2023-08-27 12:10:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532226750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245130352] [2023-08-27 12:10:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:10:53,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:53,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:53,296 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 12:10:53,298 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 12:10:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:53,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 12:10:53,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:53,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:53,864 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:10:53,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:10:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245130352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:53,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2023-08-27 12:10:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69219871] [2023-08-27 12:10:53,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 12:10:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 12:10:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-27 12:10:53,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:10:53,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 563 transitions, 10027 flow. Second operand has 19 states, 19 states have (on average 133.52631578947367) internal successors, (2537), 19 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states 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 12:10:53,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:53,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:10:53,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:10:56,542 INFO L124 PetriNetUnfolderBase]: 5132/9546 cut-off events. [2023-08-27 12:10:56,542 INFO L125 PetriNetUnfolderBase]: For 221927/221927 co-relation queries the response was YES. [2023-08-27 12:10:56,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78483 conditions, 9546 events. 5132/9546 cut-off events. For 221927/221927 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 71471 event pairs, 1410 based on Foata normal form. 116/9662 useless extension candidates. Maximal degree in co-relation 78390. Up to 7081 conditions per place. [2023-08-27 12:10:56,708 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 536 selfloop transitions, 138 changer transitions 2/676 dead transitions. [2023-08-27 12:10:56,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 676 transitions, 13043 flow [2023-08-27 12:10:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 12:10:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 12:10:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2336 transitions. [2023-08-27 12:10:56,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36741113557722554 [2023-08-27 12:10:56,720 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2336 transitions. [2023-08-27 12:10:56,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2336 transitions. [2023-08-27 12:10:56,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:10:56,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2336 transitions. [2023-08-27 12:10:56,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 137.41176470588235) internal successors, (2336), 17 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states 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 12:10:56,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:10:56,732 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:10:56,732 INFO L175 Difference]: Start difference. First operand has 279 places, 563 transitions, 10027 flow. Second operand 17 states and 2336 transitions. [2023-08-27 12:10:56,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 676 transitions, 13043 flow [2023-08-27 12:10:57,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 676 transitions, 12274 flow, removed 197 selfloop flow, removed 20 redundant places. [2023-08-27 12:10:57,721 INFO L231 Difference]: Finished difference. Result has 277 places, 602 transitions, 10363 flow [2023-08-27 12:10:57,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=9404, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10363, PETRI_PLACES=277, PETRI_TRANSITIONS=602} [2023-08-27 12:10:57,721 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-08-27 12:10:57,722 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 602 transitions, 10363 flow [2023-08-27 12:10:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 133.52631578947367) internal successors, (2537), 19 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states 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 12:10:57,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:10:57,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:10:57,727 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 12:10:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:57,927 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:10:57,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:10:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1283894264, now seen corresponding path program 11 times [2023-08-27 12:10:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:10:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034451612] [2023-08-27 12:10:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:10:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:10:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:10:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:10:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:10:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034451612] [2023-08-27 12:10:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034451612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:10:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190653530] [2023-08-27 12:10:58,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:10:58,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:10:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:10:58,424 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 12:10:58,426 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 12:10:58,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 12:10:58,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:10:58,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 12:10:58,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:10:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:58,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:10:58,933 INFO L322 Elim1Store]: treesize reduction 26, result has 68.7 percent of original size [2023-08-27 12:10:58,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 71 [2023-08-27 12:10:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:10:58,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190653530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:10:58,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:10:58,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-08-27 12:10:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237750581] [2023-08-27 12:10:58,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:10:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 12:10:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:10:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 12:10:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-08-27 12:10:59,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:10:59,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 602 transitions, 10363 flow. Second operand has 25 states, 25 states have (on average 107.08) internal successors, (2677), 25 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 12:10:59,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:10:59,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:10:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:02,099 INFO L124 PetriNetUnfolderBase]: 5185/9773 cut-off events. [2023-08-27 12:11:02,100 INFO L125 PetriNetUnfolderBase]: For 226172/226172 co-relation queries the response was YES. [2023-08-27 12:11:02,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80297 conditions, 9773 events. 5185/9773 cut-off events. For 226172/226172 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75059 event pairs, 1108 based on Foata normal form. 50/9823 useless extension candidates. Maximal degree in co-relation 80202. Up to 6575 conditions per place. [2023-08-27 12:11:02,197 INFO L140 encePairwiseOnDemand]: 362/374 looper letters, 624 selfloop transitions, 119 changer transitions 76/819 dead transitions. [2023-08-27 12:11:02,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 819 transitions, 15279 flow [2023-08-27 12:11:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 12:11:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 12:11:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2310 transitions. [2023-08-27 12:11:02,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2023-08-27 12:11:02,201 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2310 transitions. [2023-08-27 12:11:02,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2310 transitions. [2023-08-27 12:11:02,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:02,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2310 transitions. [2023-08-27 12:11:02,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states 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 12:11:02,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 374.0) internal successors, (8228), 22 states have internal predecessors, (8228), 0 states have call successors, (0), 0 states 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 12:11:02,207 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 374.0) internal successors, (8228), 22 states have internal predecessors, (8228), 0 states have call successors, (0), 0 states 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 12:11:02,207 INFO L175 Difference]: Start difference. First operand has 277 places, 602 transitions, 10363 flow. Second operand 21 states and 2310 transitions. [2023-08-27 12:11:02,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 819 transitions, 15279 flow [2023-08-27 12:11:03,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 819 transitions, 14812 flow, removed 98 selfloop flow, removed 9 redundant places. [2023-08-27 12:11:03,306 INFO L231 Difference]: Finished difference. Result has 296 places, 606 transitions, 10418 flow [2023-08-27 12:11:03,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10418, PETRI_PLACES=296, PETRI_TRANSITIONS=606} [2023-08-27 12:11:03,307 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 267 predicate places. [2023-08-27 12:11:03,307 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 606 transitions, 10418 flow [2023-08-27 12:11:03,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.08) internal successors, (2677), 25 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 12:11:03,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:03,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:03,332 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 12:11:03,513 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,SelfDestructingSolverStorable46 [2023-08-27 12:11:03,514 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:03,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash -510380896, now seen corresponding path program 12 times [2023-08-27 12:11:03,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:03,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591171091] [2023-08-27 12:11:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:03,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:11:04,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591171091] [2023-08-27 12:11:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591171091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592299630] [2023-08-27 12:11:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:11:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:04,185 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 12:11:04,187 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 12:11:04,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 12:11:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:11:04,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 12:11:04,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:11:04,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:04,896 INFO L322 Elim1Store]: treesize reduction 35, result has 80.9 percent of original size [2023-08-27 12:11:04,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 173 [2023-08-27 12:11:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:11:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592299630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:05,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:05,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 5] total 24 [2023-08-27 12:11:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140109383] [2023-08-27 12:11:05,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:05,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 12:11:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 12:11:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-08-27 12:11:05,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:11:05,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 606 transitions, 10418 flow. Second operand has 25 states, 25 states have (on average 107.12) internal successors, (2678), 25 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 12:11:05,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:05,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:11:05,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:08,770 INFO L124 PetriNetUnfolderBase]: 5103/9663 cut-off events. [2023-08-27 12:11:08,770 INFO L125 PetriNetUnfolderBase]: For 287184/287184 co-relation queries the response was YES. [2023-08-27 12:11:08,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84383 conditions, 9663 events. 5103/9663 cut-off events. For 287184/287184 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 74079 event pairs, 1642 based on Foata normal form. 72/9735 useless extension candidates. Maximal degree in co-relation 84281. Up to 8505 conditions per place. [2023-08-27 12:11:08,849 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 503 selfloop transitions, 164 changer transitions 5/672 dead transitions. [2023-08-27 12:11:08,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 672 transitions, 12596 flow [2023-08-27 12:11:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 12:11:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 12:11:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2099 transitions. [2023-08-27 12:11:08,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2953841823810864 [2023-08-27 12:11:08,852 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2099 transitions. [2023-08-27 12:11:08,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2099 transitions. [2023-08-27 12:11:08,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:08,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2099 transitions. [2023-08-27 12:11:08,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.47368421052632) internal successors, (2099), 19 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states 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 12:11:08,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 374.0) internal successors, (7480), 20 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states 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 12:11:08,858 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 374.0) internal successors, (7480), 20 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states 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 12:11:08,858 INFO L175 Difference]: Start difference. First operand has 296 places, 606 transitions, 10418 flow. Second operand 19 states and 2099 transitions. [2023-08-27 12:11:08,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 672 transitions, 12596 flow [2023-08-27 12:11:10,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 672 transitions, 12262 flow, removed 103 selfloop flow, removed 11 redundant places. [2023-08-27 12:11:10,224 INFO L231 Difference]: Finished difference. Result has 302 places, 616 transitions, 10745 flow [2023-08-27 12:11:10,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=10146, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10745, PETRI_PLACES=302, PETRI_TRANSITIONS=616} [2023-08-27 12:11:10,224 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 273 predicate places. [2023-08-27 12:11:10,224 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 616 transitions, 10745 flow [2023-08-27 12:11:10,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.12) internal successors, (2678), 25 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 12:11:10,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:10,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:10,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-27 12:11:10,427 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,SelfDestructingSolverStorable47 [2023-08-27 12:11:10,428 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:10,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1572533645, now seen corresponding path program 8 times [2023-08-27 12:11:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046380338] [2023-08-27 12:11:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:10,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:10,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046380338] [2023-08-27 12:11:10,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046380338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:10,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18700518] [2023-08-27 12:11:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:11:10,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:10,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:10,703 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:11:10,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 12:11:10,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:11:10,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:11:10,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 12:11:10,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:11,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 12:11:11,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:11:11,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:11:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:11:11,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:11,896 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:11,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 76 [2023-08-27 12:11:11,961 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:11:11,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1676 treesize of output 1468 [2023-08-27 12:11:11,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:12,011 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:12,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 700 treesize of output 556 [2023-08-27 12:11:12,034 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:12,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:12,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:12,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 508 treesize of output 460 [2023-08-27 12:11:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:11:13,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18700518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:13,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:13,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 32 [2023-08-27 12:11:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317021929] [2023-08-27 12:11:13,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:13,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 12:11:13,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:13,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 12:11:13,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=879, Unknown=4, NotChecked=0, Total=1056 [2023-08-27 12:11:13,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 374 [2023-08-27 12:11:13,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 616 transitions, 10745 flow. Second operand has 33 states, 33 states have (on average 98.75757575757575) internal successors, (3259), 33 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states 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 12:11:13,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:13,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 374 [2023-08-27 12:11:13,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:20,082 INFO L124 PetriNetUnfolderBase]: 5309/10266 cut-off events. [2023-08-27 12:11:20,082 INFO L125 PetriNetUnfolderBase]: For 339123/339123 co-relation queries the response was YES. [2023-08-27 12:11:20,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92177 conditions, 10266 events. 5309/10266 cut-off events. For 339123/339123 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 81693 event pairs, 1674 based on Foata normal form. 170/10436 useless extension candidates. Maximal degree in co-relation 92073. Up to 7489 conditions per place. [2023-08-27 12:11:20,166 INFO L140 encePairwiseOnDemand]: 362/374 looper letters, 639 selfloop transitions, 194 changer transitions 40/873 dead transitions. [2023-08-27 12:11:20,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 873 transitions, 15479 flow [2023-08-27 12:11:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-27 12:11:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-27 12:11:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5615 transitions. [2023-08-27 12:11:20,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2729703451628585 [2023-08-27 12:11:20,170 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5615 transitions. [2023-08-27 12:11:20,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5615 transitions. [2023-08-27 12:11:20,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:20,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5615 transitions. [2023-08-27 12:11:20,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 102.0909090909091) internal successors, (5615), 55 states have internal predecessors, (5615), 0 states have call successors, (0), 0 states 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 12:11:20,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 374.0) internal successors, (20944), 56 states have internal predecessors, (20944), 0 states have call successors, (0), 0 states 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 12:11:20,184 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 374.0) internal successors, (20944), 56 states have internal predecessors, (20944), 0 states have call successors, (0), 0 states 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 12:11:20,184 INFO L175 Difference]: Start difference. First operand has 302 places, 616 transitions, 10745 flow. Second operand 55 states and 5615 transitions. [2023-08-27 12:11:20,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 873 transitions, 15479 flow [2023-08-27 12:11:21,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 873 transitions, 14812 flow, removed 114 selfloop flow, removed 16 redundant places. [2023-08-27 12:11:21,881 INFO L231 Difference]: Finished difference. Result has 361 places, 663 transitions, 11730 flow [2023-08-27 12:11:21,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=10137, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=11730, PETRI_PLACES=361, PETRI_TRANSITIONS=663} [2023-08-27 12:11:21,881 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 332 predicate places. [2023-08-27 12:11:21,881 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 663 transitions, 11730 flow [2023-08-27 12:11:21,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 98.75757575757575) internal successors, (3259), 33 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states 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 12:11:21,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:21,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:21,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 12:11:22,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 12:11:22,087 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:22,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 874040187, now seen corresponding path program 9 times [2023-08-27 12:11:22,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:22,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811268955] [2023-08-27 12:11:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811268955] [2023-08-27 12:11:22,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811268955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:22,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067224403] [2023-08-27 12:11:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:11:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:22,393 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:11:22,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 12:11:22,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 12:11:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:11:22,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 12:11:22,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:22,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 12:11:22,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:11:22,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:11:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 12:11:22,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:23,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:23,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 80 [2023-08-27 12:11:23,133 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:11:23,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3628 treesize of output 3100 [2023-08-27 12:11:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:23,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:23,177 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:23,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 748 treesize of output 684 [2023-08-27 12:11:23,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:23,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:11:23,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:23,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 636 treesize of output 460 [2023-08-27 12:11:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:11:24,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067224403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:24,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:24,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 28 [2023-08-27 12:11:24,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373569213] [2023-08-27 12:11:24,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:24,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 12:11:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 12:11:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=639, Unknown=16, NotChecked=0, Total=812 [2023-08-27 12:11:24,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 374 [2023-08-27 12:11:24,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 663 transitions, 11730 flow. Second operand has 29 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 12:11:24,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:24,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 374 [2023-08-27 12:11:24,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:27,360 INFO L124 PetriNetUnfolderBase]: 5152/9871 cut-off events. [2023-08-27 12:11:27,360 INFO L125 PetriNetUnfolderBase]: For 401850/401850 co-relation queries the response was YES. [2023-08-27 12:11:27,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95151 conditions, 9871 events. 5152/9871 cut-off events. For 401850/401850 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 77029 event pairs, 1810 based on Foata normal form. 60/9931 useless extension candidates. Maximal degree in co-relation 95027. Up to 9211 conditions per place. [2023-08-27 12:11:27,449 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 558 selfloop transitions, 143 changer transitions 6/707 dead transitions. [2023-08-27 12:11:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 707 transitions, 13539 flow [2023-08-27 12:11:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 12:11:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 12:11:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1942 transitions. [2023-08-27 12:11:27,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30544196288140923 [2023-08-27 12:11:27,451 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1942 transitions. [2023-08-27 12:11:27,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1942 transitions. [2023-08-27 12:11:27,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:27,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1942 transitions. [2023-08-27 12:11:27,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 114.23529411764706) internal successors, (1942), 17 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states 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 12:11:27,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:11:27,455 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:11:27,455 INFO L175 Difference]: Start difference. First operand has 361 places, 663 transitions, 11730 flow. Second operand 17 states and 1942 transitions. [2023-08-27 12:11:27,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 707 transitions, 13539 flow [2023-08-27 12:11:29,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 707 transitions, 13099 flow, removed 161 selfloop flow, removed 15 redundant places. [2023-08-27 12:11:29,306 INFO L231 Difference]: Finished difference. Result has 357 places, 666 transitions, 11588 flow [2023-08-27 12:11:29,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=11168, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11588, PETRI_PLACES=357, PETRI_TRANSITIONS=666} [2023-08-27 12:11:29,306 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 328 predicate places. [2023-08-27 12:11:29,306 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 666 transitions, 11588 flow [2023-08-27 12:11:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 12:11:29,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:29,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:29,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-27 12:11:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 12:11:29,512 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:29,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1480228277, now seen corresponding path program 10 times [2023-08-27 12:11:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:29,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793520337] [2023-08-27 12:11:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:29,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:29,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:29,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793520337] [2023-08-27 12:11:29,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793520337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:29,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232406009] [2023-08-27 12:11:29,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:11:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:29,945 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:11:29,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 12:11:30,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:11:30,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:11:30,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 12:11:30,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:30,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:30,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:11:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:11:30,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:30,522 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1909 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1909))) (let ((.cse0 (select .cse1 ~B~0.base))) (or (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse0 (+ ~B~0.offset (* c_~i_AB~0 4)))) (not (let ((.cse2 (* c_~i_BA~0 4))) (= (select (select .cse1 c_~A~0.base) (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ .cse2 ~B~0.offset 4))))))))) is different from false [2023-08-27 12:11:30,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:30,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-08-27 12:11:30,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:30,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-08-27 12:11:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232406009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:30,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:30,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2023-08-27 12:11:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507238165] [2023-08-27 12:11:30,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:30,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 12:11:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 12:11:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-08-27 12:11:30,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 374 [2023-08-27 12:11:30,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 666 transitions, 11588 flow. Second operand has 25 states, 25 states have (on average 117.04) internal successors, (2926), 25 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 12:11:30,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:30,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 374 [2023-08-27 12:11:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:39,230 INFO L124 PetriNetUnfolderBase]: 5312/10155 cut-off events. [2023-08-27 12:11:39,230 INFO L125 PetriNetUnfolderBase]: For 387895/387895 co-relation queries the response was YES. [2023-08-27 12:11:39,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95791 conditions, 10155 events. 5312/10155 cut-off events. For 387895/387895 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 78876 event pairs, 1331 based on Foata normal form. 16/10171 useless extension candidates. Maximal degree in co-relation 95669. Up to 7473 conditions per place. [2023-08-27 12:11:39,323 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 443 selfloop transitions, 300 changer transitions 18/761 dead transitions. [2023-08-27 12:11:39,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 761 transitions, 14480 flow [2023-08-27 12:11:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 12:11:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 12:11:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1696 transitions. [2023-08-27 12:11:39,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32391138273491216 [2023-08-27 12:11:39,325 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1696 transitions. [2023-08-27 12:11:39,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1696 transitions. [2023-08-27 12:11:39,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:39,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1696 transitions. [2023-08-27 12:11:39,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 121.14285714285714) internal successors, (1696), 14 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 12:11:39,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:11:39,329 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:11:39,329 INFO L175 Difference]: Start difference. First operand has 357 places, 666 transitions, 11588 flow. Second operand 14 states and 1696 transitions. [2023-08-27 12:11:39,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 761 transitions, 14480 flow [2023-08-27 12:11:40,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 761 transitions, 14215 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-27 12:11:40,782 INFO L231 Difference]: Finished difference. Result has 361 places, 711 transitions, 12834 flow [2023-08-27 12:11:40,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=11323, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12834, PETRI_PLACES=361, PETRI_TRANSITIONS=711} [2023-08-27 12:11:40,782 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 332 predicate places. [2023-08-27 12:11:40,782 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 711 transitions, 12834 flow [2023-08-27 12:11:40,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 117.04) internal successors, (2926), 25 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 12:11:40,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:40,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:40,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 12:11:40,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:40,988 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:40,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -874791225, now seen corresponding path program 11 times [2023-08-27 12:11:40,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:40,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482421580] [2023-08-27 12:11:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:40,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:41,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482421580] [2023-08-27 12:11:41,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482421580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:41,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807658324] [2023-08-27 12:11:41,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:11:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:41,581 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:11:41,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-27 12:11:41,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:11:41,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:11:41,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 12:11:41,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:42,101 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 12:11:42,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2023-08-27 12:11:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:11:42,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:42,357 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-27 12:11:42,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 145 [2023-08-27 12:11:42,369 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:42,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 55 [2023-08-27 12:11:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807658324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:42,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:42,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2023-08-27 12:11:42,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809388097] [2023-08-27 12:11:42,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:42,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 12:11:42,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:42,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 12:11:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=611, Unknown=3, NotChecked=0, Total=702 [2023-08-27 12:11:42,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 374 [2023-08-27 12:11:42,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 711 transitions, 12834 flow. Second operand has 27 states, 27 states have (on average 112.81481481481481) internal successors, (3046), 27 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states 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 12:11:42,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:42,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 374 [2023-08-27 12:11:42,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:45,699 INFO L124 PetriNetUnfolderBase]: 5268/10053 cut-off events. [2023-08-27 12:11:45,699 INFO L125 PetriNetUnfolderBase]: For 415310/415310 co-relation queries the response was YES. [2023-08-27 12:11:45,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99425 conditions, 10053 events. 5268/10053 cut-off events. For 415310/415310 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 77796 event pairs, 1334 based on Foata normal form. 16/10069 useless extension candidates. Maximal degree in co-relation 99302. Up to 7437 conditions per place. [2023-08-27 12:11:45,794 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 442 selfloop transitions, 294 changer transitions 21/757 dead transitions. [2023-08-27 12:11:45,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 757 transitions, 14886 flow [2023-08-27 12:11:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 12:11:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 12:11:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1634 transitions. [2023-08-27 12:11:45,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31207028265851794 [2023-08-27 12:11:45,797 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1634 transitions. [2023-08-27 12:11:45,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1634 transitions. [2023-08-27 12:11:45,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:45,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1634 transitions. [2023-08-27 12:11:45,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.71428571428571) internal successors, (1634), 14 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states 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 12:11:45,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:11:45,800 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:11:45,801 INFO L175 Difference]: Start difference. First operand has 361 places, 711 transitions, 12834 flow. Second operand 14 states and 1634 transitions. [2023-08-27 12:11:45,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 757 transitions, 14886 flow [2023-08-27 12:11:47,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 757 transitions, 14294 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-27 12:11:47,516 INFO L231 Difference]: Finished difference. Result has 364 places, 706 transitions, 12773 flow [2023-08-27 12:11:47,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=12246, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12773, PETRI_PLACES=364, PETRI_TRANSITIONS=706} [2023-08-27 12:11:47,517 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 335 predicate places. [2023-08-27 12:11:47,518 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 706 transitions, 12773 flow [2023-08-27 12:11:47,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 112.81481481481481) internal successors, (3046), 27 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states 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 12:11:47,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:47,518 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:47,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-27 12:11:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:47,723 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:47,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 231546156, now seen corresponding path program 13 times [2023-08-27 12:11:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143466420] [2023-08-27 12:11:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:11:48,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143466420] [2023-08-27 12:11:48,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143466420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894585614] [2023-08-27 12:11:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:11:48,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:48,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:48,372 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:11:48,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-27 12:11:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:48,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 12:11:48,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:48,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:48,552 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-08-27 12:11:48,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2023-08-27 12:11:48,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:48,676 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-27 12:11:48,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 12:11:48,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:48,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 25 [2023-08-27 12:11:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:11:49,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:49,287 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:11:49,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:11:49,292 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:11:49,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:11:49,378 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-27 12:11:49,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 141 [2023-08-27 12:11:49,389 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:49,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 50 [2023-08-27 12:11:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:11:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894585614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:49,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:49,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-27 12:11:49,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630628824] [2023-08-27 12:11:49,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:49,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 12:11:49,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 12:11:49,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1283, Unknown=3, NotChecked=0, Total=1406 [2023-08-27 12:11:49,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 374 [2023-08-27 12:11:49,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 706 transitions, 12773 flow. Second operand has 38 states, 38 states have (on average 96.52631578947368) internal successors, (3668), 38 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states 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 12:11:49,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:49,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 374 [2023-08-27 12:11:49,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:11:53,317 INFO L124 PetriNetUnfolderBase]: 5135/9718 cut-off events. [2023-08-27 12:11:53,317 INFO L125 PetriNetUnfolderBase]: For 401181/401181 co-relation queries the response was YES. [2023-08-27 12:11:53,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95904 conditions, 9718 events. 5135/9718 cut-off events. For 401181/401181 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 73840 event pairs, 1472 based on Foata normal form. 84/9802 useless extension candidates. Maximal degree in co-relation 95782. Up to 8732 conditions per place. [2023-08-27 12:11:53,404 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 546 selfloop transitions, 175 changer transitions 2/723 dead transitions. [2023-08-27 12:11:53,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 723 transitions, 14425 flow [2023-08-27 12:11:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 12:11:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 12:11:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1291 transitions. [2023-08-27 12:11:53,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2655285890580008 [2023-08-27 12:11:53,406 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1291 transitions. [2023-08-27 12:11:53,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1291 transitions. [2023-08-27 12:11:53,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:11:53,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1291 transitions. [2023-08-27 12:11:53,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 99.3076923076923) internal successors, (1291), 13 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states 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 12:11:53,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:11:53,410 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 374.0) internal successors, (5236), 14 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:11:53,410 INFO L175 Difference]: Start difference. First operand has 364 places, 706 transitions, 12773 flow. Second operand 13 states and 1291 transitions. [2023-08-27 12:11:53,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 723 transitions, 14425 flow [2023-08-27 12:11:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 723 transitions, 13826 flow, removed 11 selfloop flow, removed 12 redundant places. [2023-08-27 12:11:54,990 INFO L231 Difference]: Finished difference. Result has 361 places, 699 transitions, 12516 flow [2023-08-27 12:11:54,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=12118, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12516, PETRI_PLACES=361, PETRI_TRANSITIONS=699} [2023-08-27 12:11:54,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 332 predicate places. [2023-08-27 12:11:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 699 transitions, 12516 flow [2023-08-27 12:11:54,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 96.52631578947368) internal successors, (3668), 38 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states 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 12:11:54,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:11:54,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:11:54,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-27 12:11:55,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-27 12:11:55,193 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:11:55,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:11:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1781659375, now seen corresponding path program 12 times [2023-08-27 12:11:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:11:55,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079855803] [2023-08-27 12:11:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:11:55,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:11:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:11:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:55,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:11:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079855803] [2023-08-27 12:11:55,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079855803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:11:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633847553] [2023-08-27 12:11:55,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:11:55,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:11:55,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:11:55,523 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:11:55,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-27 12:11:55,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 12:11:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:11:55,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 12:11:55,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:11:55,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:11:55,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:11:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:55,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:11:55,996 WARN L839 $PredicateComparison]: unable to prove that (forall ((~B~0.offset Int) (~B~0.base Int) (v_ArrVal_2053 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2053))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4))))) (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse2 (+ ~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-08-27 12:11:56,028 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:56,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-08-27 12:11:56,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:11:56,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-08-27 12:11:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:11:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633847553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:11:56,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:11:56,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2023-08-27 12:11:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339548093] [2023-08-27 12:11:56,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:11:56,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 12:11:56,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:11:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 12:11:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-08-27 12:11:56,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 374 [2023-08-27 12:11:56,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 699 transitions, 12516 flow. Second operand has 26 states, 26 states have (on average 129.0) internal successors, (3354), 26 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states 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 12:11:56,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:11:56,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 374 [2023-08-27 12:11:56,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:04,869 INFO L124 PetriNetUnfolderBase]: 5220/9872 cut-off events. [2023-08-27 12:12:04,869 INFO L125 PetriNetUnfolderBase]: For 431764/431764 co-relation queries the response was YES. [2023-08-27 12:12:04,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97730 conditions, 9872 events. 5220/9872 cut-off events. For 431764/431764 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 75102 event pairs, 1154 based on Foata normal form. 56/9928 useless extension candidates. Maximal degree in co-relation 97609. Up to 6608 conditions per place. [2023-08-27 12:12:05,113 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 419 selfloop transitions, 375 changer transitions 4/798 dead transitions. [2023-08-27 12:12:05,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 798 transitions, 15693 flow [2023-08-27 12:12:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 12:12:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 12:12:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2523 transitions. [2023-08-27 12:12:05,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3550520686743597 [2023-08-27 12:12:05,115 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2523 transitions. [2023-08-27 12:12:05,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2523 transitions. [2023-08-27 12:12:05,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:05,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2523 transitions. [2023-08-27 12:12:05,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 132.78947368421052) internal successors, (2523), 19 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states 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 12:12:05,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 374.0) internal successors, (7480), 20 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states 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 12:12:05,120 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 374.0) internal successors, (7480), 20 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states 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 12:12:05,120 INFO L175 Difference]: Start difference. First operand has 361 places, 699 transitions, 12516 flow. Second operand 19 states and 2523 transitions. [2023-08-27 12:12:05,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 798 transitions, 15693 flow [2023-08-27 12:12:06,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 798 transitions, 15289 flow, removed 34 selfloop flow, removed 14 redundant places. [2023-08-27 12:12:06,869 INFO L231 Difference]: Finished difference. Result has 368 places, 734 transitions, 13697 flow [2023-08-27 12:12:06,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=12154, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13697, PETRI_PLACES=368, PETRI_TRANSITIONS=734} [2023-08-27 12:12:06,870 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 339 predicate places. [2023-08-27 12:12:06,870 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 734 transitions, 13697 flow [2023-08-27 12:12:06,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 129.0) internal successors, (3354), 26 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states 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 12:12:06,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:06,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:06,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-27 12:12:07,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:07,074 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:07,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1332075280, now seen corresponding path program 14 times [2023-08-27 12:12:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:07,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073760446] [2023-08-27 12:12:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:07,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:07,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073760446] [2023-08-27 12:12:07,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073760446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:07,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135243930] [2023-08-27 12:12:07,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:12:07,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:07,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:07,587 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:07,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-27 12:12:07,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:12:07,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:12:07,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 12:12:07,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:12:08,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:12:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:08,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:08,522 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~i_AB~0 4))) (let ((.cse1 (forall ((~B~0.offset Int) (v_ArrVal_2100 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2100) ~B~0.base) (+ ~B~0.offset .cse5)) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse0 (+ c_~i_BA~0 1))) (and (or (< .cse0 c_~An~0) .cse1) (forall ((~B~0.offset Int) (v_ArrVal_2100 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2100))) (let ((.cse4 (select .cse2 ~B~0.base))) (or (let ((.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3 4)) (select .cse4 (+ .cse3 ~B~0.offset 4)))) (not (= (select .cse4 (+ ~B~0.offset .cse5)) |c_thread1Thread1of1ForFork0_#t~mem1|)))))) (or .cse1 (< .cse0 c_~Bn~0))))) is different from false [2023-08-27 12:12:08,534 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:08,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-08-27 12:12:08,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-27 12:12:08,549 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:08,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-08-27 12:12:08,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-27 12:12:08,615 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-27 12:12:08,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-08-27 12:12:08,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:08,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 95 [2023-08-27 12:12:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135243930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:09,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2023-08-27 12:12:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712653589] [2023-08-27 12:12:09,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 12:12:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 12:12:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1067, Unknown=1, NotChecked=66, Total=1260 [2023-08-27 12:12:09,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 374 [2023-08-27 12:12:09,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 734 transitions, 13697 flow. Second operand has 36 states, 36 states have (on average 102.61111111111111) internal successors, (3694), 36 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states 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 12:12:09,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:09,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 374 [2023-08-27 12:12:09,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:12,187 INFO L124 PetriNetUnfolderBase]: 5143/9779 cut-off events. [2023-08-27 12:12:12,187 INFO L125 PetriNetUnfolderBase]: For 368097/368097 co-relation queries the response was YES. [2023-08-27 12:12:12,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95458 conditions, 9779 events. 5143/9779 cut-off events. For 368097/368097 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 74609 event pairs, 1457 based on Foata normal form. 62/9841 useless extension candidates. Maximal degree in co-relation 95336. Up to 9008 conditions per place. [2023-08-27 12:12:12,279 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 578 selfloop transitions, 195 changer transitions 5/778 dead transitions. [2023-08-27 12:12:12,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 778 transitions, 15764 flow [2023-08-27 12:12:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 12:12:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 12:12:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1793 transitions. [2023-08-27 12:12:12,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820069204152249 [2023-08-27 12:12:12,281 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1793 transitions. [2023-08-27 12:12:12,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1793 transitions. [2023-08-27 12:12:12,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:12,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1793 transitions. [2023-08-27 12:12:12,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 105.47058823529412) internal successors, (1793), 17 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states 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 12:12:12,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:12:12,286 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 374.0) internal successors, (6732), 18 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states 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 12:12:12,286 INFO L175 Difference]: Start difference. First operand has 368 places, 734 transitions, 13697 flow. Second operand 17 states and 1793 transitions. [2023-08-27 12:12:12,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 778 transitions, 15764 flow [2023-08-27 12:12:13,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 778 transitions, 15459 flow, removed 60 selfloop flow, removed 8 redundant places. [2023-08-27 12:12:13,906 INFO L231 Difference]: Finished difference. Result has 377 places, 732 transitions, 13798 flow [2023-08-27 12:12:13,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=13267, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13798, PETRI_PLACES=377, PETRI_TRANSITIONS=732} [2023-08-27 12:12:13,907 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 348 predicate places. [2023-08-27 12:12:13,907 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 732 transitions, 13798 flow [2023-08-27 12:12:13,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 102.61111111111111) internal successors, (3694), 36 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states 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 12:12:13,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:13,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:13,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-27 12:12:14,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-27 12:12:14,112 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:14,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1052392838, now seen corresponding path program 15 times [2023-08-27 12:12:14,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:14,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836192945] [2023-08-27 12:12:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836192945] [2023-08-27 12:12:14,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836192945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:14,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416758389] [2023-08-27 12:12:14,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:12:14,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:14,587 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:14,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-27 12:12:14,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 12:12:14,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:12:14,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 12:12:14,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:12:15,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:12:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:15,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:15,462 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~B~0.offset (* c_~i_AB~0 4)))) (let ((.cse0 (forall ((v_ArrVal_2147 (Array Int Int)) (~B~0.base Int)) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2147) ~B~0.base) .cse3) |c_thread1Thread1of1ForFork0_#t~mem1|)))) (.cse1 (+ c_~i_BA~0 1))) (and (or .cse0 (< .cse1 c_~Bn~0)) (forall ((v_ArrVal_2147 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2147))) (let ((.cse2 (select .cse4 ~B~0.base))) (or (not (= (select .cse2 .cse3) |c_thread1Thread1of1ForFork0_#t~mem1|)) (let ((.cse5 (* c_~i_BA~0 4))) (= (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse5 4)) (select .cse2 (+ .cse5 4 c_~B~0.offset)))))))) (or .cse0 (< .cse1 c_~An~0))))) is different from false [2023-08-27 12:12:15,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:15,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-08-27 12:12:15,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-27 12:12:15,494 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:15,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-08-27 12:12:15,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-27 12:12:15,552 INFO L322 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2023-08-27 12:12:15,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 161 [2023-08-27 12:12:15,574 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:15,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 95 [2023-08-27 12:12:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416758389] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:16,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 36 [2023-08-27 12:12:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059012731] [2023-08-27 12:12:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 12:12:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 12:12:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1127, Unknown=1, NotChecked=68, Total=1332 [2023-08-27 12:12:16,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 374 [2023-08-27 12:12:16,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 732 transitions, 13798 flow. Second operand has 37 states, 37 states have (on average 102.51351351351352) internal successors, (3793), 37 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states 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 12:12:16,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:16,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 374 [2023-08-27 12:12:16,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:18,964 INFO L124 PetriNetUnfolderBase]: 5115/9663 cut-off events. [2023-08-27 12:12:18,964 INFO L125 PetriNetUnfolderBase]: For 370526/370526 co-relation queries the response was YES. [2023-08-27 12:12:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95413 conditions, 9663 events. 5115/9663 cut-off events. For 370526/370526 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 72866 event pairs, 1580 based on Foata normal form. 8/9671 useless extension candidates. Maximal degree in co-relation 95292. Up to 9332 conditions per place. [2023-08-27 12:12:19,060 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 587 selfloop transitions, 144 changer transitions 10/741 dead transitions. [2023-08-27 12:12:19,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 741 transitions, 15255 flow [2023-08-27 12:12:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 12:12:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 12:12:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1465 transitions. [2023-08-27 12:12:19,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2797937356760886 [2023-08-27 12:12:19,074 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1465 transitions. [2023-08-27 12:12:19,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1465 transitions. [2023-08-27 12:12:19,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:19,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1465 transitions. [2023-08-27 12:12:19,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.64285714285714) internal successors, (1465), 14 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states 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 12:12:19,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:12:19,078 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 374.0) internal successors, (5610), 15 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 12:12:19,078 INFO L175 Difference]: Start difference. First operand has 377 places, 732 transitions, 13798 flow. Second operand 14 states and 1465 transitions. [2023-08-27 12:12:19,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 741 transitions, 15255 flow [2023-08-27 12:12:20,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 741 transitions, 14634 flow, removed 33 selfloop flow, removed 14 redundant places. [2023-08-27 12:12:20,586 INFO L231 Difference]: Finished difference. Result has 376 places, 722 transitions, 13253 flow [2023-08-27 12:12:20,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=13058, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13253, PETRI_PLACES=376, PETRI_TRANSITIONS=722} [2023-08-27 12:12:20,587 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 347 predicate places. [2023-08-27 12:12:20,587 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 722 transitions, 13253 flow [2023-08-27 12:12:20,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 102.51351351351352) internal successors, (3793), 37 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states 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 12:12:20,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:20,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:20,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-27 12:12:20,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:20,794 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:20,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1996094234, now seen corresponding path program 16 times [2023-08-27 12:12:20,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:20,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567054934] [2023-08-27 12:12:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:20,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:12:21,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:21,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567054934] [2023-08-27 12:12:21,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567054934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:21,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46447434] [2023-08-27 12:12:21,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:12:21,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:21,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:21,261 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:21,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-27 12:12:21,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:12:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:12:21,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 12:12:21,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:12:21,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:21,953 INFO L322 Elim1Store]: treesize reduction 22, result has 88.0 percent of original size [2023-08-27 12:12:21,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 186 [2023-08-27 12:12:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 12:12:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46447434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:22,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2023-08-27 12:12:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361124939] [2023-08-27 12:12:22,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:22,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 12:12:22,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 12:12:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2023-08-27 12:12:22,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:12:22,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 722 transitions, 13253 flow. Second operand has 32 states, 32 states have (on average 106.78125) internal successors, (3417), 32 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states 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 12:12:22,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:22,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:12:22,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:25,727 INFO L124 PetriNetUnfolderBase]: 5104/9593 cut-off events. [2023-08-27 12:12:25,727 INFO L125 PetriNetUnfolderBase]: For 315050/315050 co-relation queries the response was YES. [2023-08-27 12:12:25,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91519 conditions, 9593 events. 5104/9593 cut-off events. For 315050/315050 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 71977 event pairs, 1633 based on Foata normal form. 10/9603 useless extension candidates. Maximal degree in co-relation 91398. Up to 9157 conditions per place. [2023-08-27 12:12:25,813 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 600 selfloop transitions, 144 changer transitions 10/754 dead transitions. [2023-08-27 12:12:25,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 754 transitions, 14983 flow [2023-08-27 12:12:25,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 12:12:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 12:12:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2287 transitions. [2023-08-27 12:12:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2911892029539088 [2023-08-27 12:12:25,815 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2287 transitions. [2023-08-27 12:12:25,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2287 transitions. [2023-08-27 12:12:25,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:25,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2287 transitions. [2023-08-27 12:12:25,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 108.9047619047619) internal successors, (2287), 21 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states 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 12:12:25,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 374.0) internal successors, (8228), 22 states have internal predecessors, (8228), 0 states have call successors, (0), 0 states 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 12:12:25,820 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 374.0) internal successors, (8228), 22 states have internal predecessors, (8228), 0 states have call successors, (0), 0 states 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 12:12:25,820 INFO L175 Difference]: Start difference. First operand has 376 places, 722 transitions, 13253 flow. Second operand 21 states and 2287 transitions. [2023-08-27 12:12:25,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 754 transitions, 14983 flow [2023-08-27 12:12:27,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 754 transitions, 14505 flow, removed 20 selfloop flow, removed 19 redundant places. [2023-08-27 12:12:27,049 INFO L231 Difference]: Finished difference. Result has 379 places, 725 transitions, 13189 flow [2023-08-27 12:12:27,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=12661, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13189, PETRI_PLACES=379, PETRI_TRANSITIONS=725} [2023-08-27 12:12:27,050 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 350 predicate places. [2023-08-27 12:12:27,050 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 725 transitions, 13189 flow [2023-08-27 12:12:27,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 106.78125) internal successors, (3417), 32 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states 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 12:12:27,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:27,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:27,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-27 12:12:27,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:27,256 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:27,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1840379383, now seen corresponding path program 13 times [2023-08-27 12:12:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:27,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302163060] [2023-08-27 12:12:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 12:12:27,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302163060] [2023-08-27 12:12:27,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302163060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634226751] [2023-08-27 12:12:27,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:12:27,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:27,690 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:27,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-27 12:12:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:27,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 12:12:27,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:12:28,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 12:12:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:12:28,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:28,302 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2248 (Array Int Int)) (~B~0.offset Int) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2248))) (let ((.cse2 (select .cse0 ~B~0.base))) (or (not (let ((.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1 4)) (select .cse2 (+ .cse1 ~B~0.offset 4))))) (= |c_thread1Thread1of1ForFork0_#t~mem1| (select .cse2 (+ ~B~0.offset (* c_~i_AB~0 4)))))))) is different from false [2023-08-27 12:12:28,333 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:28,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 178 [2023-08-27 12:12:28,350 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:12:28,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 89 [2023-08-27 12:12:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 12:12:28,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634226751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:28,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:28,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2023-08-27 12:12:28,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433411841] [2023-08-27 12:12:28,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 12:12:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 12:12:28,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=526, Unknown=1, NotChecked=46, Total=650 [2023-08-27 12:12:28,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 374 [2023-08-27 12:12:28,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 725 transitions, 13189 flow. Second operand has 26 states, 26 states have (on average 116.96153846153847) internal successors, (3041), 26 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states 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 12:12:28,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:28,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 374 [2023-08-27 12:12:28,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:32,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 12:12:39,130 WARN L234 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 12:12:43,867 INFO L124 PetriNetUnfolderBase]: 5071/9521 cut-off events. [2023-08-27 12:12:43,867 INFO L125 PetriNetUnfolderBase]: For 314892/314892 co-relation queries the response was YES. [2023-08-27 12:12:43,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90727 conditions, 9521 events. 5071/9521 cut-off events. For 314892/314892 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 71122 event pairs, 1024 based on Foata normal form. 32/9553 useless extension candidates. Maximal degree in co-relation 90607. Up to 6922 conditions per place. [2023-08-27 12:12:43,954 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 430 selfloop transitions, 354 changer transitions 17/801 dead transitions. [2023-08-27 12:12:43,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 801 transitions, 15890 flow [2023-08-27 12:12:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 12:12:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 12:12:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2410 transitions. [2023-08-27 12:12:43,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32219251336898397 [2023-08-27 12:12:43,957 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2410 transitions. [2023-08-27 12:12:43,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2410 transitions. [2023-08-27 12:12:43,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:43,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2410 transitions. [2023-08-27 12:12:43,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 120.5) internal successors, (2410), 20 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states 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 12:12:43,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:12:43,961 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:12:43,961 INFO L175 Difference]: Start difference. First operand has 379 places, 725 transitions, 13189 flow. Second operand 20 states and 2410 transitions. [2023-08-27 12:12:43,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 801 transitions, 15890 flow [2023-08-27 12:12:45,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 801 transitions, 15712 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-08-27 12:12:45,014 INFO L231 Difference]: Finished difference. Result has 382 places, 748 transitions, 14290 flow [2023-08-27 12:12:45,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=13011, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14290, PETRI_PLACES=382, PETRI_TRANSITIONS=748} [2023-08-27 12:12:45,015 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 353 predicate places. [2023-08-27 12:12:45,015 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 748 transitions, 14290 flow [2023-08-27 12:12:45,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 116.96153846153847) internal successors, (3041), 26 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states 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 12:12:45,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:45,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:45,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-27 12:12:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-27 12:12:45,225 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:45,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1699118169, now seen corresponding path program 17 times [2023-08-27 12:12:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426946749] [2023-08-27 12:12:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:45,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426946749] [2023-08-27 12:12:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426946749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364829635] [2023-08-27 12:12:45,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:12:45,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:45,409 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:45,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-27 12:12:45,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 12:12:45,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:12:45,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 12:12:45,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:45,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:45,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364829635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:45,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:45,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 8 [2023-08-27 12:12:45,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296343061] [2023-08-27 12:12:45,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:45,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 12:12:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 12:12:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-27 12:12:45,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 374 [2023-08-27 12:12:45,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 748 transitions, 14290 flow. Second operand has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 12:12:45,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:45,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 374 [2023-08-27 12:12:45,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:49,013 INFO L124 PetriNetUnfolderBase]: 6457/12060 cut-off events. [2023-08-27 12:12:49,013 INFO L125 PetriNetUnfolderBase]: For 408618/408618 co-relation queries the response was YES. [2023-08-27 12:12:49,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117093 conditions, 12060 events. 6457/12060 cut-off events. For 408618/408618 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 92669 event pairs, 954 based on Foata normal form. 15/12075 useless extension candidates. Maximal degree in co-relation 116974. Up to 6584 conditions per place. [2023-08-27 12:12:49,127 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 498 selfloop transitions, 406 changer transitions 22/926 dead transitions. [2023-08-27 12:12:49,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 926 transitions, 18943 flow [2023-08-27 12:12:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 12:12:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 12:12:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1623 transitions. [2023-08-27 12:12:49,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339572192513369 [2023-08-27 12:12:49,128 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1623 transitions. [2023-08-27 12:12:49,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1623 transitions. [2023-08-27 12:12:49,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:49,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1623 transitions. [2023-08-27 12:12:49,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.3) internal successors, (1623), 10 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 12:12:49,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:12:49,131 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:12:49,131 INFO L175 Difference]: Start difference. First operand has 382 places, 748 transitions, 14290 flow. Second operand 10 states and 1623 transitions. [2023-08-27 12:12:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 926 transitions, 18943 flow [2023-08-27 12:12:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 926 transitions, 18427 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-08-27 12:12:50,975 INFO L231 Difference]: Finished difference. Result has 383 places, 840 transitions, 16795 flow [2023-08-27 12:12:50,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=13774, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16795, PETRI_PLACES=383, PETRI_TRANSITIONS=840} [2023-08-27 12:12:50,976 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 354 predicate places. [2023-08-27 12:12:50,976 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 840 transitions, 16795 flow [2023-08-27 12:12:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 12:12:50,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:50,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:50,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-27 12:12:51,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-27 12:12:51,182 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:51,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2121214333, now seen corresponding path program 18 times [2023-08-27 12:12:51,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:51,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838809305] [2023-08-27 12:12:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:51,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:51,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838809305] [2023-08-27 12:12:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838809305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565547091] [2023-08-27 12:12:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:12:51,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:51,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:51,271 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:51,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-27 12:12:51,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 12:12:51,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:12:51,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 12:12:51,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:51,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:12:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565547091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:51,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:51,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 3] total 8 [2023-08-27 12:12:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903124440] [2023-08-27 12:12:51,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:51,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 12:12:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 12:12:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-27 12:12:51,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 374 [2023-08-27 12:12:51,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 840 transitions, 16795 flow. Second operand has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 12:12:51,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:51,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 374 [2023-08-27 12:12:51,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:12:55,527 INFO L124 PetriNetUnfolderBase]: 7065/13203 cut-off events. [2023-08-27 12:12:55,527 INFO L125 PetriNetUnfolderBase]: For 488651/488651 co-relation queries the response was YES. [2023-08-27 12:12:55,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133247 conditions, 13203 events. 7065/13203 cut-off events. For 488651/488651 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 103329 event pairs, 1240 based on Foata normal form. 23/13226 useless extension candidates. Maximal degree in co-relation 133122. Up to 8249 conditions per place. [2023-08-27 12:12:55,653 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 508 selfloop transitions, 398 changer transitions 36/942 dead transitions. [2023-08-27 12:12:55,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 942 transitions, 20517 flow [2023-08-27 12:12:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 12:12:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 12:12:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1614 transitions. [2023-08-27 12:12:55,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43155080213903746 [2023-08-27 12:12:55,655 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1614 transitions. [2023-08-27 12:12:55,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1614 transitions. [2023-08-27 12:12:55,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:12:55,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1614 transitions. [2023-08-27 12:12:55,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.4) internal successors, (1614), 10 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states 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 12:12:55,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:12:55,657 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:12:55,657 INFO L175 Difference]: Start difference. First operand has 383 places, 840 transitions, 16795 flow. Second operand 10 states and 1614 transitions. [2023-08-27 12:12:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 942 transitions, 20517 flow [2023-08-27 12:12:58,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 942 transitions, 19941 flow, removed 157 selfloop flow, removed 5 redundant places. [2023-08-27 12:12:58,054 INFO L231 Difference]: Finished difference. Result has 390 places, 860 transitions, 18052 flow [2023-08-27 12:12:58,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=16231, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18052, PETRI_PLACES=390, PETRI_TRANSITIONS=860} [2023-08-27 12:12:58,055 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 361 predicate places. [2023-08-27 12:12:58,055 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 860 transitions, 18052 flow [2023-08-27 12:12:58,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 12:12:58,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:12:58,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:12:58,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-27 12:12:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-27 12:12:58,261 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:12:58,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:12:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash 205599081, now seen corresponding path program 19 times [2023-08-27 12:12:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:12:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124652733] [2023-08-27 12:12:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:12:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:12:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:12:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124652733] [2023-08-27 12:12:58,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124652733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:12:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608894272] [2023-08-27 12:12:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:12:58,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:12:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:12:58,357 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:12:58,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-27 12:12:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:12:58,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 12:12:58,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:12:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:12:58,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:12:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:12:58,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608894272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:12:58,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:12:58,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 8 [2023-08-27 12:12:58,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246411201] [2023-08-27 12:12:58,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:12:58,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 12:12:58,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:12:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 12:12:58,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-27 12:12:58,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 374 [2023-08-27 12:12:58,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 860 transitions, 18052 flow. Second operand has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 12:12:58,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:12:58,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 374 [2023-08-27 12:12:58,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:03,000 INFO L124 PetriNetUnfolderBase]: 7547/14069 cut-off events. [2023-08-27 12:13:03,000 INFO L125 PetriNetUnfolderBase]: For 530925/530925 co-relation queries the response was YES. [2023-08-27 12:13:03,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143480 conditions, 14069 events. 7547/14069 cut-off events. For 530925/530925 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 111696 event pairs, 2129 based on Foata normal form. 13/14082 useless extension candidates. Maximal degree in co-relation 143352. Up to 11737 conditions per place. [2023-08-27 12:13:03,137 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 797 selfloop transitions, 145 changer transitions 19/961 dead transitions. [2023-08-27 12:13:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 961 transitions, 21720 flow [2023-08-27 12:13:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 12:13:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 12:13:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1613 transitions. [2023-08-27 12:13:03,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43128342245989304 [2023-08-27 12:13:03,139 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1613 transitions. [2023-08-27 12:13:03,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1613 transitions. [2023-08-27 12:13:03,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:03,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1613 transitions. [2023-08-27 12:13:03,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.3) internal successors, (1613), 10 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states 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 12:13:03,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:13:03,141 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:13:03,141 INFO L175 Difference]: Start difference. First operand has 390 places, 860 transitions, 18052 flow. Second operand 10 states and 1613 transitions. [2023-08-27 12:13:03,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 961 transitions, 21720 flow [2023-08-27 12:13:05,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 961 transitions, 21277 flow, removed 135 selfloop flow, removed 7 redundant places. [2023-08-27 12:13:05,590 INFO L231 Difference]: Finished difference. Result has 390 places, 881 transitions, 18586 flow [2023-08-27 12:13:05,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=17613, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18586, PETRI_PLACES=390, PETRI_TRANSITIONS=881} [2023-08-27 12:13:05,591 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 361 predicate places. [2023-08-27 12:13:05,591 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 881 transitions, 18586 flow [2023-08-27 12:13:05,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.3) internal successors, (1573), 10 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 12:13:05,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:05,591 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:05,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-27 12:13:05,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:05,796 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:05,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash 469546266, now seen corresponding path program 20 times [2023-08-27 12:13:05,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:05,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181546745] [2023-08-27 12:13:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:05,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:13:05,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181546745] [2023-08-27 12:13:05,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181546745] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:05,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756606807] [2023-08-27 12:13:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:13:05,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:05,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:05,961 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:05,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-27 12:13:06,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:13:06,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:06,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 12:13:06,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:13:06,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:13:06,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756606807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:06,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:06,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-27 12:13:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368563438] [2023-08-27 12:13:06,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:06,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 12:13:06,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 12:13:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-08-27 12:13:06,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:13:06,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 881 transitions, 18586 flow. Second operand has 17 states, 17 states have (on average 133.47058823529412) internal successors, (2269), 17 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states 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 12:13:06,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:06,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:13:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:10,046 INFO L124 PetriNetUnfolderBase]: 6654/12429 cut-off events. [2023-08-27 12:13:10,046 INFO L125 PetriNetUnfolderBase]: For 467633/467633 co-relation queries the response was YES. [2023-08-27 12:13:10,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126739 conditions, 12429 events. 6654/12429 cut-off events. For 467633/467633 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 96898 event pairs, 3478 based on Foata normal form. 116/12545 useless extension candidates. Maximal degree in co-relation 126610. Up to 11615 conditions per place. [2023-08-27 12:13:10,167 INFO L140 encePairwiseOnDemand]: 370/374 looper letters, 750 selfloop transitions, 4 changer transitions 149/903 dead transitions. [2023-08-27 12:13:10,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 903 transitions, 20333 flow [2023-08-27 12:13:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 12:13:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 12:13:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1100 transitions. [2023-08-27 12:13:10,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-27 12:13:10,168 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1100 transitions. [2023-08-27 12:13:10,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1100 transitions. [2023-08-27 12:13:10,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:10,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1100 transitions. [2023-08-27 12:13:10,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.5) internal successors, (1100), 8 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states 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 12:13:10,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states 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 12:13:10,170 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 374.0) internal successors, (3366), 9 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states 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 12:13:10,171 INFO L175 Difference]: Start difference. First operand has 390 places, 881 transitions, 18586 flow. Second operand 8 states and 1100 transitions. [2023-08-27 12:13:10,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 903 transitions, 20333 flow [2023-08-27 12:13:12,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 903 transitions, 19957 flow, removed 124 selfloop flow, removed 7 redundant places. [2023-08-27 12:13:12,190 INFO L231 Difference]: Finished difference. Result has 385 places, 754 transitions, 15506 flow [2023-08-27 12:13:12,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=17723, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=855, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15506, PETRI_PLACES=385, PETRI_TRANSITIONS=754} [2023-08-27 12:13:12,190 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 356 predicate places. [2023-08-27 12:13:12,190 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 754 transitions, 15506 flow [2023-08-27 12:13:12,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.47058823529412) internal successors, (2269), 17 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states 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 12:13:12,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:12,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:12,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-27 12:13:12,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-27 12:13:12,396 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:12,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:12,396 INFO L85 PathProgramCache]: Analyzing trace with hash -12609698, now seen corresponding path program 21 times [2023-08-27 12:13:12,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:12,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002753720] [2023-08-27 12:13:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:12,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:13:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002753720] [2023-08-27 12:13:12,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002753720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195664832] [2023-08-27 12:13:12,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:13:12,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:12,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:12,537 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:12,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-27 12:13:12,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 12:13:12,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:12,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 12:13:12,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:12,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:13:12,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 12:13:12,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195664832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:12,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:12,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 12:13:12,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133385796] [2023-08-27 12:13:12,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:12,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 12:13:12,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:12,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 12:13:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-27 12:13:12,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:13:12,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 754 transitions, 15506 flow. Second operand has 18 states, 18 states have (on average 133.22222222222223) internal successors, (2398), 18 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states 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 12:13:12,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:12,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:13:12,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:15,977 INFO L124 PetriNetUnfolderBase]: 5288/10268 cut-off events. [2023-08-27 12:13:15,977 INFO L125 PetriNetUnfolderBase]: For 391714/391714 co-relation queries the response was YES. [2023-08-27 12:13:16,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101671 conditions, 10268 events. 5288/10268 cut-off events. For 391714/391714 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 82321 event pairs, 2605 based on Foata normal form. 553/10821 useless extension candidates. Maximal degree in co-relation 101542. Up to 7013 conditions per place. [2023-08-27 12:13:16,074 INFO L140 encePairwiseOnDemand]: 369/374 looper letters, 556 selfloop transitions, 104 changer transitions 38/698 dead transitions. [2023-08-27 12:13:16,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 698 transitions, 15066 flow [2023-08-27 12:13:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 12:13:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 12:13:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1233 transitions. [2023-08-27 12:13:16,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663101604278075 [2023-08-27 12:13:16,075 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1233 transitions. [2023-08-27 12:13:16,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1233 transitions. [2023-08-27 12:13:16,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:16,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1233 transitions. [2023-08-27 12:13:16,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 12:13:16,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:13:16,078 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 374.0) internal successors, (3740), 10 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states 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 12:13:16,078 INFO L175 Difference]: Start difference. First operand has 385 places, 754 transitions, 15506 flow. Second operand 9 states and 1233 transitions. [2023-08-27 12:13:16,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 698 transitions, 15066 flow [2023-08-27 12:13:17,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 698 transitions, 13891 flow, removed 60 selfloop flow, removed 31 redundant places. [2023-08-27 12:13:17,545 INFO L231 Difference]: Finished difference. Result has 330 places, 599 transitions, 11217 flow [2023-08-27 12:13:17,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=11645, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11217, PETRI_PLACES=330, PETRI_TRANSITIONS=599} [2023-08-27 12:13:17,546 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 301 predicate places. [2023-08-27 12:13:17,546 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 599 transitions, 11217 flow [2023-08-27 12:13:17,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.22222222222223) internal successors, (2398), 18 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states 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 12:13:17,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:17,547 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:17,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-08-27 12:13:17,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:17,752 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:17,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1757527862, now seen corresponding path program 22 times [2023-08-27 12:13:17,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:17,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642708382] [2023-08-27 12:13:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:17,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:13:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642708382] [2023-08-27 12:13:17,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642708382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624225373] [2023-08-27 12:13:17,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:13:17,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:17,976 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:17,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-27 12:13:18,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:13:18,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:18,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 12:13:18,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:13:18,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:13:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624225373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:18,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-27 12:13:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483914916] [2023-08-27 12:13:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:18,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 12:13:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:18,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 12:13:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-27 12:13:18,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 374 [2023-08-27 12:13:18,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 599 transitions, 11217 flow. Second operand has 30 states, 30 states have (on average 129.83333333333334) internal successors, (3895), 30 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states 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 12:13:18,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:18,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 374 [2023-08-27 12:13:18,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:21,666 INFO L124 PetriNetUnfolderBase]: 5174/9991 cut-off events. [2023-08-27 12:13:21,666 INFO L125 PetriNetUnfolderBase]: For 357134/357134 co-relation queries the response was YES. [2023-08-27 12:13:21,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96719 conditions, 9991 events. 5174/9991 cut-off events. For 357134/357134 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79149 event pairs, 1092 based on Foata normal form. 121/10112 useless extension candidates. Maximal degree in co-relation 96609. Up to 4194 conditions per place. [2023-08-27 12:13:21,773 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 515 selfloop transitions, 243 changer transitions 8/766 dead transitions. [2023-08-27 12:13:21,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 766 transitions, 15405 flow [2023-08-27 12:13:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 12:13:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 12:13:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1991 transitions. [2023-08-27 12:13:21,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35490196078431374 [2023-08-27 12:13:21,774 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1991 transitions. [2023-08-27 12:13:21,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1991 transitions. [2023-08-27 12:13:21,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:21,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1991 transitions. [2023-08-27 12:13:21,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 132.73333333333332) internal successors, (1991), 15 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states 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 12:13:21,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 374.0) internal successors, (5984), 16 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states 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 12:13:21,778 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 374.0) internal successors, (5984), 16 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states 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 12:13:21,778 INFO L175 Difference]: Start difference. First operand has 330 places, 599 transitions, 11217 flow. Second operand 15 states and 1991 transitions. [2023-08-27 12:13:21,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 766 transitions, 15405 flow [2023-08-27 12:13:22,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 766 transitions, 15214 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-08-27 12:13:22,747 INFO L231 Difference]: Finished difference. Result has 337 places, 644 transitions, 12708 flow [2023-08-27 12:13:22,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=11036, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12708, PETRI_PLACES=337, PETRI_TRANSITIONS=644} [2023-08-27 12:13:22,748 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 308 predicate places. [2023-08-27 12:13:22,748 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 644 transitions, 12708 flow [2023-08-27 12:13:22,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 129.83333333333334) internal successors, (3895), 30 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states 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 12:13:22,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:22,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:22,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-27 12:13:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:22,954 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:22,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1061569088, now seen corresponding path program 23 times [2023-08-27 12:13:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:22,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357741416] [2023-08-27 12:13:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 12:13:23,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:23,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357741416] [2023-08-27 12:13:23,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357741416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:23,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442415897] [2023-08-27 12:13:23,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:13:23,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:23,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:23,059 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:23,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-27 12:13:23,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 12:13:23,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:23,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 12:13:23,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 12:13:23,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 12:13:23,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442415897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:23,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:23,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 12:13:23,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031013363] [2023-08-27 12:13:23,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:23,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 12:13:23,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:23,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 12:13:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2023-08-27 12:13:23,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 374 [2023-08-27 12:13:23,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 644 transitions, 12708 flow. Second operand has 20 states, 20 states have (on average 133.4) internal successors, (2668), 20 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states 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 12:13:23,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:23,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 374 [2023-08-27 12:13:23,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:25,433 INFO L124 PetriNetUnfolderBase]: 4137/7719 cut-off events. [2023-08-27 12:13:25,434 INFO L125 PetriNetUnfolderBase]: For 281734/281734 co-relation queries the response was YES. [2023-08-27 12:13:25,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77395 conditions, 7719 events. 4137/7719 cut-off events. For 281734/281734 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 54925 event pairs, 1242 based on Foata normal form. 63/7782 useless extension candidates. Maximal degree in co-relation 77292. Up to 6925 conditions per place. [2023-08-27 12:13:25,497 INFO L140 encePairwiseOnDemand]: 368/374 looper letters, 431 selfloop transitions, 24 changer transitions 105/560 dead transitions. [2023-08-27 12:13:25,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 560 transitions, 11795 flow [2023-08-27 12:13:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 12:13:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 12:13:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1365 transitions. [2023-08-27 12:13:25,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3649732620320856 [2023-08-27 12:13:25,498 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1365 transitions. [2023-08-27 12:13:25,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1365 transitions. [2023-08-27 12:13:25,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:25,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1365 transitions. [2023-08-27 12:13:25,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 136.5) internal successors, (1365), 10 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 12:13:25,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:13:25,501 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 374.0) internal successors, (4114), 11 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states 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 12:13:25,501 INFO L175 Difference]: Start difference. First operand has 337 places, 644 transitions, 12708 flow. Second operand 10 states and 1365 transitions. [2023-08-27 12:13:25,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 560 transitions, 11795 flow [2023-08-27 12:13:26,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 560 transitions, 11218 flow, removed 37 selfloop flow, removed 31 redundant places. [2023-08-27 12:13:26,171 INFO L231 Difference]: Finished difference. Result has 296 places, 450 transitions, 8178 flow [2023-08-27 12:13:26,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=9700, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8178, PETRI_PLACES=296, PETRI_TRANSITIONS=450} [2023-08-27 12:13:26,172 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 267 predicate places. [2023-08-27 12:13:26,172 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 450 transitions, 8178 flow [2023-08-27 12:13:26,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 133.4) internal successors, (2668), 20 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states 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 12:13:26,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:26,172 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:26,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-27 12:13:26,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:26,377 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:26,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1524891378, now seen corresponding path program 24 times [2023-08-27 12:13:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:26,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283503314] [2023-08-27 12:13:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:13:27,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283503314] [2023-08-27 12:13:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283503314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304798972] [2023-08-27 12:13:27,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:13:27,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:27,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:27,309 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:27,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-27 12:13:27,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 12:13:27,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:27,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 12:13:27,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:13:28,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:28,557 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:13:28,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:13:28,601 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:13:28,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:13:28,622 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:13:28,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:13:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:13:29,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304798972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:29,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:29,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-08-27 12:13:29,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603968259] [2023-08-27 12:13:29,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:29,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-27 12:13:29,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-27 12:13:29,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2023-08-27 12:13:29,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:13:29,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 450 transitions, 8178 flow. Second operand has 47 states, 47 states have (on average 106.59574468085107) internal successors, (5010), 47 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states 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 12:13:29,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:29,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:13:29,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:39,897 INFO L124 PetriNetUnfolderBase]: 7684/14115 cut-off events. [2023-08-27 12:13:39,897 INFO L125 PetriNetUnfolderBase]: For 544707/544707 co-relation queries the response was YES. [2023-08-27 12:13:39,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139728 conditions, 14115 events. 7684/14115 cut-off events. For 544707/544707 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 110017 event pairs, 1213 based on Foata normal form. 301/14416 useless extension candidates. Maximal degree in co-relation 139639. Up to 6700 conditions per place. [2023-08-27 12:13:40,022 INFO L140 encePairwiseOnDemand]: 362/374 looper letters, 684 selfloop transitions, 545 changer transitions 8/1237 dead transitions. [2023-08-27 12:13:40,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1237 transitions, 23944 flow [2023-08-27 12:13:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-27 12:13:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-27 12:13:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 8371 transitions. [2023-08-27 12:13:40,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2984313725490196 [2023-08-27 12:13:40,030 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 8371 transitions. [2023-08-27 12:13:40,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 8371 transitions. [2023-08-27 12:13:40,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:40,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 8371 transitions. [2023-08-27 12:13:40,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 111.61333333333333) internal successors, (8371), 75 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states 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 12:13:40,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 374.0) internal successors, (28424), 76 states have internal predecessors, (28424), 0 states have call successors, (0), 0 states 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 12:13:40,047 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 374.0) internal successors, (28424), 76 states have internal predecessors, (28424), 0 states have call successors, (0), 0 states 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 12:13:40,047 INFO L175 Difference]: Start difference. First operand has 296 places, 450 transitions, 8178 flow. Second operand 75 states and 8371 transitions. [2023-08-27 12:13:40,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1237 transitions, 23944 flow [2023-08-27 12:13:41,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1237 transitions, 23575 flow, removed 103 selfloop flow, removed 16 redundant places. [2023-08-27 12:13:41,519 INFO L231 Difference]: Finished difference. Result has 374 places, 907 transitions, 19488 flow [2023-08-27 12:13:41,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=8009, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=19488, PETRI_PLACES=374, PETRI_TRANSITIONS=907} [2023-08-27 12:13:41,519 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 345 predicate places. [2023-08-27 12:13:41,520 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 907 transitions, 19488 flow [2023-08-27 12:13:41,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 106.59574468085107) internal successors, (5010), 47 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states 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 12:13:41,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:41,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:41,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-27 12:13:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:41,726 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:41,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:41,726 INFO L85 PathProgramCache]: Analyzing trace with hash 602219909, now seen corresponding path program 14 times [2023-08-27 12:13:41,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:41,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208232509] [2023-08-27 12:13:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:13:42,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208232509] [2023-08-27 12:13:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208232509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849305499] [2023-08-27 12:13:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:13:42,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:42,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:42,229 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:42,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-27 12:13:42,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:13:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:42,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 12:13:42,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:13:42,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:42,820 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:13:42,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:13:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:13:42,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849305499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:42,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 27 [2023-08-27 12:13:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187087001] [2023-08-27 12:13:42,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 12:13:42,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 12:13:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2023-08-27 12:13:42,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:13:42,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 907 transitions, 19488 flow. Second operand has 28 states, 28 states have (on average 121.25) internal successors, (3395), 28 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 12:13:42,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:42,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:13:42,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:13:49,010 INFO L124 PetriNetUnfolderBase]: 8132/15103 cut-off events. [2023-08-27 12:13:49,010 INFO L125 PetriNetUnfolderBase]: For 2354753/2354753 co-relation queries the response was YES. [2023-08-27 12:13:49,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226582 conditions, 15103 events. 8132/15103 cut-off events. For 2354753/2354753 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 120968 event pairs, 1571 based on Foata normal form. 40/15143 useless extension candidates. Maximal degree in co-relation 226445. Up to 8957 conditions per place. [2023-08-27 12:13:49,190 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 598 selfloop transitions, 454 changer transitions 72/1124 dead transitions. [2023-08-27 12:13:49,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1124 transitions, 26034 flow [2023-08-27 12:13:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 12:13:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 12:13:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3143 transitions. [2023-08-27 12:13:49,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33614973262032083 [2023-08-27 12:13:49,193 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3143 transitions. [2023-08-27 12:13:49,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3143 transitions. [2023-08-27 12:13:49,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:13:49,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3143 transitions. [2023-08-27 12:13:49,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 125.72) internal successors, (3143), 25 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states 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 12:13:49,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 374.0) internal successors, (9724), 26 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states 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 12:13:49,199 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 374.0) internal successors, (9724), 26 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states 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 12:13:49,199 INFO L175 Difference]: Start difference. First operand has 374 places, 907 transitions, 19488 flow. Second operand 25 states and 3143 transitions. [2023-08-27 12:13:49,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1124 transitions, 26034 flow [2023-08-27 12:13:54,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1124 transitions, 23017 flow, removed 1490 selfloop flow, removed 9 redundant places. [2023-08-27 12:13:54,933 INFO L231 Difference]: Finished difference. Result has 395 places, 972 transitions, 18896 flow [2023-08-27 12:13:54,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=16641, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18896, PETRI_PLACES=395, PETRI_TRANSITIONS=972} [2023-08-27 12:13:54,934 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 366 predicate places. [2023-08-27 12:13:54,934 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 972 transitions, 18896 flow [2023-08-27 12:13:54,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 121.25) internal successors, (3395), 28 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states 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 12:13:54,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:13:54,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:13:54,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-27 12:13:55,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-27 12:13:55,139 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:13:55,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:13:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1737146491, now seen corresponding path program 15 times [2023-08-27 12:13:55,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:13:55,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113848012] [2023-08-27 12:13:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:13:55,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:13:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:13:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:13:55,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:13:55,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113848012] [2023-08-27 12:13:55,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113848012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:13:55,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284209368] [2023-08-27 12:13:55,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:13:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:13:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:13:55,515 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:13:55,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-27 12:13:55,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 12:13:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:13:55,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 12:13:55,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:13:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:13:56,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:13:56,197 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:13:56,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:13:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:13:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284209368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:13:56,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:13:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 26 [2023-08-27 12:13:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617491282] [2023-08-27 12:13:56,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:13:56,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 12:13:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:13:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 12:13:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-08-27 12:13:56,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:13:56,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 972 transitions, 18896 flow. Second operand has 27 states, 27 states have (on average 120.96296296296296) internal successors, (3266), 27 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states 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 12:13:56,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:13:56,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:13:56,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:14:02,518 INFO L124 PetriNetUnfolderBase]: 7999/14972 cut-off events. [2023-08-27 12:14:02,518 INFO L125 PetriNetUnfolderBase]: For 2247300/2247300 co-relation queries the response was YES. [2023-08-27 12:14:02,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215219 conditions, 14972 events. 7999/14972 cut-off events. For 2247300/2247300 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 120821 event pairs, 1579 based on Foata normal form. 48/15020 useless extension candidates. Maximal degree in co-relation 215076. Up to 8957 conditions per place. [2023-08-27 12:14:02,802 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 571 selfloop transitions, 508 changer transitions 48/1127 dead transitions. [2023-08-27 12:14:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1127 transitions, 24437 flow [2023-08-27 12:14:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 12:14:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 12:14:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3259 transitions. [2023-08-27 12:14:02,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351501439736734 [2023-08-27 12:14:02,805 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3259 transitions. [2023-08-27 12:14:02,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3259 transitions. [2023-08-27 12:14:02,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:14:02,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3259 transitions. [2023-08-27 12:14:02,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 125.34615384615384) internal successors, (3259), 26 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states 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 12:14:02,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 374.0) internal successors, (10098), 27 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states 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 12:14:02,811 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 374.0) internal successors, (10098), 27 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states 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 12:14:02,812 INFO L175 Difference]: Start difference. First operand has 395 places, 972 transitions, 18896 flow. Second operand 26 states and 3259 transitions. [2023-08-27 12:14:02,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1127 transitions, 24437 flow [2023-08-27 12:14:08,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1127 transitions, 23513 flow, removed 188 selfloop flow, removed 9 redundant places. [2023-08-27 12:14:08,498 INFO L231 Difference]: Finished difference. Result has 412 places, 1009 transitions, 20322 flow [2023-08-27 12:14:08,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=18126, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20322, PETRI_PLACES=412, PETRI_TRANSITIONS=1009} [2023-08-27 12:14:08,499 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 383 predicate places. [2023-08-27 12:14:08,499 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1009 transitions, 20322 flow [2023-08-27 12:14:08,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 120.96296296296296) internal successors, (3266), 27 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states 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 12:14:08,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:14:08,499 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:14:08,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-27 12:14:08,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-27 12:14:08,704 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:14:08,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:14:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2025282701, now seen corresponding path program 16 times [2023-08-27 12:14:08,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:14:08,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701957879] [2023-08-27 12:14:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:14:08,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:14:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:14:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:14:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:14:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701957879] [2023-08-27 12:14:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701957879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:14:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699861275] [2023-08-27 12:14:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:14:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:14:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:14:09,126 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:14:09,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-27 12:14:09,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:14:09,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:14:09,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 12:14:09,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:14:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:14:09,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:14:10,048 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:14:10,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:14:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:14:10,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699861275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:14:10,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:14:10,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2023-08-27 12:14:10,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15877704] [2023-08-27 12:14:10,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:14:10,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 12:14:10,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:14:10,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 12:14:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2023-08-27 12:14:10,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:14:10,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1009 transitions, 20322 flow. Second operand has 29 states, 29 states have (on average 121.10344827586206) internal successors, (3512), 29 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states 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 12:14:10,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:14:10,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:14:10,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:14:17,832 INFO L124 PetriNetUnfolderBase]: 8835/16576 cut-off events. [2023-08-27 12:14:17,833 INFO L125 PetriNetUnfolderBase]: For 2475108/2475108 co-relation queries the response was YES. [2023-08-27 12:14:18,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240986 conditions, 16576 events. 8835/16576 cut-off events. For 2475108/2475108 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 136978 event pairs, 1565 based on Foata normal form. 32/16608 useless extension candidates. Maximal degree in co-relation 240838. Up to 8820 conditions per place. [2023-08-27 12:14:18,149 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 557 selfloop transitions, 669 changer transitions 1/1227 dead transitions. [2023-08-27 12:14:18,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1227 transitions, 27914 flow [2023-08-27 12:14:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 12:14:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 12:14:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3376 transitions. [2023-08-27 12:14:18,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343236284412755 [2023-08-27 12:14:18,152 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3376 transitions. [2023-08-27 12:14:18,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3376 transitions. [2023-08-27 12:14:18,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:14:18,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3376 transitions. [2023-08-27 12:14:18,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 125.03703703703704) internal successors, (3376), 27 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states 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 12:14:18,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 374.0) internal successors, (10472), 28 states have internal predecessors, (10472), 0 states have call successors, (0), 0 states 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 12:14:18,159 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 374.0) internal successors, (10472), 28 states have internal predecessors, (10472), 0 states have call successors, (0), 0 states 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 12:14:18,159 INFO L175 Difference]: Start difference. First operand has 412 places, 1009 transitions, 20322 flow. Second operand 27 states and 3376 transitions. [2023-08-27 12:14:18,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1227 transitions, 27914 flow [2023-08-27 12:14:25,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1227 transitions, 26946 flow, removed 137 selfloop flow, removed 12 redundant places. [2023-08-27 12:14:25,794 INFO L231 Difference]: Finished difference. Result has 429 places, 1142 transitions, 24241 flow [2023-08-27 12:14:25,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=19547, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24241, PETRI_PLACES=429, PETRI_TRANSITIONS=1142} [2023-08-27 12:14:25,795 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 400 predicate places. [2023-08-27 12:14:25,795 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1142 transitions, 24241 flow [2023-08-27 12:14:25,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 121.10344827586206) internal successors, (3512), 29 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states 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 12:14:25,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:14:25,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:14:25,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-27 12:14:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-08-27 12:14:26,000 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:14:26,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:14:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash -137137339, now seen corresponding path program 17 times [2023-08-27 12:14:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:14:26,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327928582] [2023-08-27 12:14:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:14:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:14:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:14:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:14:26,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:14:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327928582] [2023-08-27 12:14:26,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327928582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:14:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999835513] [2023-08-27 12:14:26,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:14:26,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:14:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:14:26,396 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:14:26,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-27 12:14:26,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 12:14:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:14:26,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 12:14:26,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:14:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:14:26,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:14:26,979 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:14:26,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:14:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:14:27,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999835513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:14:27,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:14:27,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 28 [2023-08-27 12:14:27,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561171997] [2023-08-27 12:14:27,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:14:27,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 12:14:27,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:14:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 12:14:27,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-08-27 12:14:27,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:14:27,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1142 transitions, 24241 flow. Second operand has 29 states, 29 states have (on average 121.10344827586206) internal successors, (3512), 29 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states 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 12:14:27,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:14:27,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:14:27,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:14:34,930 INFO L124 PetriNetUnfolderBase]: 8839/16670 cut-off events. [2023-08-27 12:14:34,930 INFO L125 PetriNetUnfolderBase]: For 2491302/2491302 co-relation queries the response was YES. [2023-08-27 12:14:35,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242939 conditions, 16670 events. 8839/16670 cut-off events. For 2491302/2491302 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 138727 event pairs, 1595 based on Foata normal form. 56/16726 useless extension candidates. Maximal degree in co-relation 242784. Up to 9109 conditions per place. [2023-08-27 12:14:35,147 INFO L140 encePairwiseOnDemand]: 365/374 looper letters, 566 selfloop transitions, 638 changer transitions 19/1223 dead transitions. [2023-08-27 12:14:35,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1223 transitions, 28533 flow [2023-08-27 12:14:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 12:14:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 12:14:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3379 transitions. [2023-08-27 12:14:35,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33462071697365814 [2023-08-27 12:14:35,150 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3379 transitions. [2023-08-27 12:14:35,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3379 transitions. [2023-08-27 12:14:35,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:14:35,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3379 transitions. [2023-08-27 12:14:35,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 125.14814814814815) internal successors, (3379), 27 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states 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 12:14:35,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 374.0) internal successors, (10472), 28 states have internal predecessors, (10472), 0 states have call successors, (0), 0 states 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 12:14:35,156 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 374.0) internal successors, (10472), 28 states have internal predecessors, (10472), 0 states have call successors, (0), 0 states 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 12:14:35,156 INFO L175 Difference]: Start difference. First operand has 429 places, 1142 transitions, 24241 flow. Second operand 27 states and 3379 transitions. [2023-08-27 12:14:35,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1223 transitions, 28533 flow [2023-08-27 12:14:41,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1223 transitions, 27934 flow, removed 156 selfloop flow, removed 13 redundant places. [2023-08-27 12:14:41,791 INFO L231 Difference]: Finished difference. Result has 442 places, 1139 transitions, 24836 flow [2023-08-27 12:14:41,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=23642, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24836, PETRI_PLACES=442, PETRI_TRANSITIONS=1139} [2023-08-27 12:14:41,791 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 413 predicate places. [2023-08-27 12:14:41,791 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1139 transitions, 24836 flow [2023-08-27 12:14:41,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 121.10344827586206) internal successors, (3512), 29 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states 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 12:14:41,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:14:41,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:14:41,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-27 12:14:41,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:14:41,997 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:14:41,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:14:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 25199690, now seen corresponding path program 25 times [2023-08-27 12:14:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:14:41,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055270696] [2023-08-27 12:14:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:14:41,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:14:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:14:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:14:42,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:14:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055270696] [2023-08-27 12:14:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055270696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:14:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387956642] [2023-08-27 12:14:42,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:14:42,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:14:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:14:42,584 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:14:42,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-27 12:14:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:14:42,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 12:14:42,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:14:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:14:43,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:14:43,917 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:14:43,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:14:43,958 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:14:43,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:14:43,976 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:14:43,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:14:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:14:44,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387956642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:14:44,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:14:44,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-08-27 12:14:44,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091699472] [2023-08-27 12:14:44,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:14:44,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 12:14:44,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:14:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 12:14:44,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 12:14:44,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:14:44,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1139 transitions, 24836 flow. Second operand has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:14:44,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:14:44,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:14:44,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:14:51,773 INFO L124 PetriNetUnfolderBase]: 8751/16456 cut-off events. [2023-08-27 12:14:51,773 INFO L125 PetriNetUnfolderBase]: For 2420060/2420060 co-relation queries the response was YES. [2023-08-27 12:14:51,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240513 conditions, 16456 events. 8751/16456 cut-off events. For 2420060/2420060 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 135964 event pairs, 2869 based on Foata normal form. 4/16460 useless extension candidates. Maximal degree in co-relation 240358. Up to 16074 conditions per place. [2023-08-27 12:14:52,144 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 1036 selfloop transitions, 119 changer transitions 2/1157 dead transitions. [2023-08-27 12:14:52,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1157 transitions, 27375 flow [2023-08-27 12:14:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 12:14:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 12:14:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2174 transitions. [2023-08-27 12:14:52,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29064171122994653 [2023-08-27 12:14:52,147 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2174 transitions. [2023-08-27 12:14:52,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2174 transitions. [2023-08-27 12:14:52,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:14:52,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2174 transitions. [2023-08-27 12:14:52,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.7) internal successors, (2174), 20 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states 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 12:14:52,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:14:52,152 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:14:52,152 INFO L175 Difference]: Start difference. First operand has 442 places, 1139 transitions, 24836 flow. Second operand 20 states and 2174 transitions. [2023-08-27 12:14:52,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1157 transitions, 27375 flow [2023-08-27 12:14:58,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1157 transitions, 26197 flow, removed 0 selfloop flow, removed 20 redundant places. [2023-08-27 12:14:58,867 INFO L231 Difference]: Finished difference. Result has 439 places, 1139 transitions, 23906 flow [2023-08-27 12:14:58,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=23658, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=23906, PETRI_PLACES=439, PETRI_TRANSITIONS=1139} [2023-08-27 12:14:58,869 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 410 predicate places. [2023-08-27 12:14:58,869 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1139 transitions, 23906 flow [2023-08-27 12:14:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:14:58,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:14:58,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:14:58,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-27 12:14:59,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:14:59,075 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:14:59,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:14:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 885263512, now seen corresponding path program 26 times [2023-08-27 12:14:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:14:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049511869] [2023-08-27 12:14:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:14:59,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:14:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:14:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:14:59,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:14:59,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049511869] [2023-08-27 12:14:59,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049511869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:14:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787857634] [2023-08-27 12:14:59,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:14:59,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:14:59,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:14:59,842 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:14:59,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-27 12:15:00,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:15:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:15:00,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 12:15:00,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:15:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:15:00,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:15:01,156 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:15:01,156 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:15:01,192 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:15:01,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:15:01,208 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:15:01,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:15:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:15:01,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787857634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:15:01,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:15:01,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-08-27 12:15:01,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811449502] [2023-08-27 12:15:01,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:15:01,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 12:15:01,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:15:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 12:15:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 12:15:01,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:15:01,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1139 transitions, 23906 flow. Second operand has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:15:01,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:15:01,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:15:01,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:15:09,222 INFO L124 PetriNetUnfolderBase]: 8837/16610 cut-off events. [2023-08-27 12:15:09,222 INFO L125 PetriNetUnfolderBase]: For 2568441/2568441 co-relation queries the response was YES. [2023-08-27 12:15:09,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241546 conditions, 16610 events. 8837/16610 cut-off events. For 2568441/2568441 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 137415 event pairs, 2819 based on Foata normal form. 72/16682 useless extension candidates. Maximal degree in co-relation 241390. Up to 15989 conditions per place. [2023-08-27 12:15:09,435 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 1056 selfloop transitions, 163 changer transitions 8/1227 dead transitions. [2023-08-27 12:15:09,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1227 transitions, 27915 flow [2023-08-27 12:15:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 12:15:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 12:15:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2733 transitions. [2023-08-27 12:15:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922994652406417 [2023-08-27 12:15:09,437 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2733 transitions. [2023-08-27 12:15:09,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2733 transitions. [2023-08-27 12:15:09,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:15:09,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2733 transitions. [2023-08-27 12:15:09,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 109.32) internal successors, (2733), 25 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 12:15:09,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 374.0) internal successors, (9724), 26 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states 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 12:15:09,445 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 374.0) internal successors, (9724), 26 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states 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 12:15:09,445 INFO L175 Difference]: Start difference. First operand has 439 places, 1139 transitions, 23906 flow. Second operand 25 states and 2733 transitions. [2023-08-27 12:15:09,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1227 transitions, 27915 flow [2023-08-27 12:15:15,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1227 transitions, 27657 flow, removed 4 selfloop flow, removed 18 redundant places. [2023-08-27 12:15:15,158 INFO L231 Difference]: Finished difference. Result has 445 places, 1156 transitions, 24392 flow [2023-08-27 12:15:15,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=23660, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=980, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=24392, PETRI_PLACES=445, PETRI_TRANSITIONS=1156} [2023-08-27 12:15:15,159 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 416 predicate places. [2023-08-27 12:15:15,159 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1156 transitions, 24392 flow [2023-08-27 12:15:15,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:15:15,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:15:15,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:15:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-27 12:15:15,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:15:15,365 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:15:15,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:15:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash -95598262, now seen corresponding path program 27 times [2023-08-27 12:15:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:15:15,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072543975] [2023-08-27 12:15:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:15:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:15:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:15:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:15:16,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:15:16,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072543975] [2023-08-27 12:15:16,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072543975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:15:16,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706188134] [2023-08-27 12:15:16,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:15:16,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:15:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:15:16,126 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:15:16,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-27 12:15:16,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 12:15:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:15:16,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-27 12:15:16,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:15:16,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 12:15:16,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:15:16,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:15:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:15:17,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:15:26,283 WARN L234 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 12:15:34,633 WARN L234 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 12:15:34,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:15:34,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-27 12:15:34,708 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:15:34,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1740 treesize of output 1520 [2023-08-27 12:15:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:34,746 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:15:34,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 566 [2023-08-27 12:15:34,761 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:34,761 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:34,782 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:15:34,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 516 treesize of output 462 [2023-08-27 12:15:36,687 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:15:36,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-27 12:15:36,743 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:15:36,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1740 treesize of output 1520 [2023-08-27 12:15:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:36,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:15:36,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 724 treesize of output 670 [2023-08-27 12:15:36,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:36,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:15:36,843 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:15:36,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 620 treesize of output 462 [2023-08-27 12:15:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 12:15:38,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706188134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:15:38,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:15:38,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-08-27 12:15:38,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559350300] [2023-08-27 12:15:38,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:15:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-27 12:15:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:15:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-27 12:15:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1931, Unknown=9, NotChecked=0, Total=2162 [2023-08-27 12:15:38,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 374 [2023-08-27 12:15:38,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1156 transitions, 24392 flow. Second operand has 47 states, 47 states have (on average 98.46808510638297) internal successors, (4628), 47 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states 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 12:15:38,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:15:38,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 374 [2023-08-27 12:15:38,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:15:53,544 INFO L124 PetriNetUnfolderBase]: 10562/19822 cut-off events. [2023-08-27 12:15:53,544 INFO L125 PetriNetUnfolderBase]: For 3212475/3212475 co-relation queries the response was YES. [2023-08-27 12:15:53,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290294 conditions, 19822 events. 10562/19822 cut-off events. For 3212475/3212475 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 169452 event pairs, 1473 based on Foata normal form. 140/19962 useless extension candidates. Maximal degree in co-relation 290137. Up to 12224 conditions per place. [2023-08-27 12:15:53,808 INFO L140 encePairwiseOnDemand]: 362/374 looper letters, 766 selfloop transitions, 1061 changer transitions 24/1851 dead transitions. [2023-08-27 12:15:53,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1851 transitions, 39353 flow [2023-08-27 12:15:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-27 12:15:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-27 12:15:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 7675 transitions. [2023-08-27 12:15:53,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2736185383244207 [2023-08-27 12:15:53,813 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 7675 transitions. [2023-08-27 12:15:53,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 7675 transitions. [2023-08-27 12:15:53,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:15:53,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 7675 transitions. [2023-08-27 12:15:53,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 102.33333333333333) internal successors, (7675), 75 states have internal predecessors, (7675), 0 states have call successors, (0), 0 states 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 12:15:53,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 374.0) internal successors, (28424), 76 states have internal predecessors, (28424), 0 states have call successors, (0), 0 states 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 12:15:53,829 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 374.0) internal successors, (28424), 76 states have internal predecessors, (28424), 0 states have call successors, (0), 0 states 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 12:15:53,829 INFO L175 Difference]: Start difference. First operand has 445 places, 1156 transitions, 24392 flow. Second operand 75 states and 7675 transitions. [2023-08-27 12:15:53,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1851 transitions, 39353 flow [2023-08-27 12:16:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1851 transitions, 38909 flow, removed 83 selfloop flow, removed 19 redundant places. [2023-08-27 12:16:02,405 INFO L231 Difference]: Finished difference. Result has 521 places, 1608 transitions, 36711 flow [2023-08-27 12:16:02,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=24003, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=36711, PETRI_PLACES=521, PETRI_TRANSITIONS=1608} [2023-08-27 12:16:02,406 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 492 predicate places. [2023-08-27 12:16:02,406 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1608 transitions, 36711 flow [2023-08-27 12:16:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 98.46808510638297) internal successors, (4628), 47 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states 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 12:16:02,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:16:02,406 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:16:02,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-27 12:16:02,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:16:02,611 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:16:02,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:16:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash -454888816, now seen corresponding path program 28 times [2023-08-27 12:16:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:16:02,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44317626] [2023-08-27 12:16:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:16:02,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:16:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:16:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:16:03,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:16:03,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44317626] [2023-08-27 12:16:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44317626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:16:03,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597379648] [2023-08-27 12:16:03,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:16:03,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:16:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:16:03,205 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:16:03,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-27 12:16:03,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:16:03,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:16:03,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 12:16:03,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:16:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:16:04,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:16:04,274 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:16:04,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:16:04,290 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:16:04,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:16:04,296 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:16:04,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:16:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:16:04,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597379648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:16:04,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:16:04,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2023-08-27 12:16:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139649332] [2023-08-27 12:16:04,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:16:04,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 12:16:04,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:16:04,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 12:16:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2023-08-27 12:16:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:16:04,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1608 transitions, 36711 flow. Second operand has 44 states, 44 states have (on average 106.47727272727273) internal successors, (4685), 44 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states 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 12:16:04,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:16:04,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:16:04,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:16:16,548 INFO L124 PetriNetUnfolderBase]: 10533/19761 cut-off events. [2023-08-27 12:16:16,549 INFO L125 PetriNetUnfolderBase]: For 3822391/3822391 co-relation queries the response was YES. [2023-08-27 12:16:16,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318629 conditions, 19761 events. 10533/19761 cut-off events. For 3822391/3822391 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 168287 event pairs, 3141 based on Foata normal form. 6/19767 useless extension candidates. Maximal degree in co-relation 318452. Up to 19346 conditions per place. [2023-08-27 12:16:16,863 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 1481 selfloop transitions, 145 changer transitions 3/1629 dead transitions. [2023-08-27 12:16:16,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1629 transitions, 40321 flow [2023-08-27 12:16:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 12:16:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 12:16:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2176 transitions. [2023-08-27 12:16:16,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2909090909090909 [2023-08-27 12:16:16,865 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2176 transitions. [2023-08-27 12:16:16,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2176 transitions. [2023-08-27 12:16:16,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:16:16,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2176 transitions. [2023-08-27 12:16:16,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 108.8) internal successors, (2176), 20 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states 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 12:16:16,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:16:16,870 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:16:16,870 INFO L175 Difference]: Start difference. First operand has 521 places, 1608 transitions, 36711 flow. Second operand 20 states and 2176 transitions. [2023-08-27 12:16:16,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1629 transitions, 40321 flow [2023-08-27 12:16:31,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1629 transitions, 38816 flow, removed 546 selfloop flow, removed 25 redundant places. [2023-08-27 12:16:31,536 INFO L231 Difference]: Finished difference. Result has 516 places, 1608 transitions, 35520 flow [2023-08-27 12:16:31,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=35206, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=35520, PETRI_PLACES=516, PETRI_TRANSITIONS=1608} [2023-08-27 12:16:31,537 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 487 predicate places. [2023-08-27 12:16:31,537 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1608 transitions, 35520 flow [2023-08-27 12:16:31,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 106.47727272727273) internal successors, (4685), 44 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states 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 12:16:31,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:16:31,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:16:31,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-27 12:16:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:16:31,744 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:16:31,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:16:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -223391746, now seen corresponding path program 29 times [2023-08-27 12:16:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:16:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247097371] [2023-08-27 12:16:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:16:31,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:16:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:16:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:16:32,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:16:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247097371] [2023-08-27 12:16:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247097371] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:16:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765935778] [2023-08-27 12:16:32,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 12:16:32,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:16:32,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:16:32,298 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:16:32,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-27 12:16:32,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-27 12:16:32,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:16:32,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 12:16:32,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:16:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:16:32,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:16:33,051 INFO L322 Elim1Store]: treesize reduction 24, result has 68.8 percent of original size [2023-08-27 12:16:33,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2023-08-27 12:16:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:16:33,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765935778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:16:33,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:16:33,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 6] total 32 [2023-08-27 12:16:33,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603617946] [2023-08-27 12:16:33,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:16:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 12:16:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:16:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 12:16:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 12:16:33,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:16:33,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1608 transitions, 35520 flow. Second operand has 33 states, 33 states have (on average 106.96969696969697) internal successors, (3530), 33 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states 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 12:16:33,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:16:33,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:16:33,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:16:45,101 INFO L124 PetriNetUnfolderBase]: 10461/19707 cut-off events. [2023-08-27 12:16:45,101 INFO L125 PetriNetUnfolderBase]: For 3938718/3938718 co-relation queries the response was YES. [2023-08-27 12:16:45,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318089 conditions, 19707 events. 10461/19707 cut-off events. For 3938718/3938718 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 168699 event pairs, 1355 based on Foata normal form. 84/19791 useless extension candidates. Maximal degree in co-relation 317915. Up to 8891 conditions per place. [2023-08-27 12:16:45,405 INFO L140 encePairwiseOnDemand]: 363/374 looper letters, 1125 selfloop transitions, 763 changer transitions 110/1998 dead transitions. [2023-08-27 12:16:45,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1998 transitions, 47414 flow [2023-08-27 12:16:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 12:16:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 12:16:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2866 transitions. [2023-08-27 12:16:45,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29473467708761825 [2023-08-27 12:16:45,408 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2866 transitions. [2023-08-27 12:16:45,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2866 transitions. [2023-08-27 12:16:45,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:16:45,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2866 transitions. [2023-08-27 12:16:45,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.23076923076923) internal successors, (2866), 26 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states 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 12:16:45,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 374.0) internal successors, (10098), 27 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states 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 12:16:45,414 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 374.0) internal successors, (10098), 27 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states 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 12:16:45,414 INFO L175 Difference]: Start difference. First operand has 516 places, 1608 transitions, 35520 flow. Second operand 26 states and 2866 transitions. [2023-08-27 12:16:45,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1998 transitions, 47414 flow [2023-08-27 12:17:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1998 transitions, 47122 flow, removed 8 selfloop flow, removed 16 redundant places. [2023-08-27 12:17:00,031 INFO L231 Difference]: Finished difference. Result has 528 places, 1676 transitions, 38994 flow [2023-08-27 12:17:00,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=35228, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=38994, PETRI_PLACES=528, PETRI_TRANSITIONS=1676} [2023-08-27 12:17:00,032 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 499 predicate places. [2023-08-27 12:17:00,032 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1676 transitions, 38994 flow [2023-08-27 12:17:00,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 106.96969696969697) internal successors, (3530), 33 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states 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 12:17:00,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:17:00,032 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:17:00,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-27 12:17:00,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-27 12:17:00,238 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:17:00,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:17:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash 257556357, now seen corresponding path program 18 times [2023-08-27 12:17:00,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:17:00,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112750037] [2023-08-27 12:17:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:17:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:17:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:17:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 12:17:00,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:17:00,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112750037] [2023-08-27 12:17:00,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112750037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:17:00,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252854328] [2023-08-27 12:17:00,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:17:00,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:17:00,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:17:00,621 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:17:00,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-27 12:17:00,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 12:17:00,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:17:00,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 12:17:00,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:17:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 12:17:01,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:17:01,208 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:17:01,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:17:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 12:17:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252854328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:17:01,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:17:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 6] total 25 [2023-08-27 12:17:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698986058] [2023-08-27 12:17:01,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:17:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 12:17:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:17:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 12:17:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-08-27 12:17:01,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 374 [2023-08-27 12:17:01,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1676 transitions, 38994 flow. Second operand has 26 states, 26 states have (on average 121.23076923076923) internal successors, (3152), 26 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 12:17:01,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:17:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 374 [2023-08-27 12:17:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:17:12,871 INFO L124 PetriNetUnfolderBase]: 10075/19217 cut-off events. [2023-08-27 12:17:12,871 INFO L125 PetriNetUnfolderBase]: For 4179682/4179682 co-relation queries the response was YES. [2023-08-27 12:17:13,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321189 conditions, 19217 events. 10075/19217 cut-off events. For 4179682/4179682 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 165950 event pairs, 1518 based on Foata normal form. 20/19237 useless extension candidates. Maximal degree in co-relation 321011. Up to 10724 conditions per place. [2023-08-27 12:17:13,282 INFO L140 encePairwiseOnDemand]: 366/374 looper letters, 931 selfloop transitions, 816 changer transitions 1/1748 dead transitions. [2023-08-27 12:17:13,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1748 transitions, 44259 flow [2023-08-27 12:17:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 12:17:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 12:17:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2261 transitions. [2023-08-27 12:17:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33585858585858586 [2023-08-27 12:17:13,284 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2261 transitions. [2023-08-27 12:17:13,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2261 transitions. [2023-08-27 12:17:13,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:17:13,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2261 transitions. [2023-08-27 12:17:13,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.61111111111111) internal successors, (2261), 18 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 12:17:13,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 374.0) internal successors, (7106), 19 states have internal predecessors, (7106), 0 states have call successors, (0), 0 states 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 12:17:13,288 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 374.0) internal successors, (7106), 19 states have internal predecessors, (7106), 0 states have call successors, (0), 0 states 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 12:17:13,288 INFO L175 Difference]: Start difference. First operand has 528 places, 1676 transitions, 38994 flow. Second operand 18 states and 2261 transitions. [2023-08-27 12:17:13,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1748 transitions, 44259 flow [2023-08-27 12:17:29,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1748 transitions, 42799 flow, removed 172 selfloop flow, removed 16 redundant places. [2023-08-27 12:17:29,466 INFO L231 Difference]: Finished difference. Result has 531 places, 1683 transitions, 39640 flow [2023-08-27 12:17:29,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=37542, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=810, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=39640, PETRI_PLACES=531, PETRI_TRANSITIONS=1683} [2023-08-27 12:17:29,467 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 502 predicate places. [2023-08-27 12:17:29,467 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1683 transitions, 39640 flow [2023-08-27 12:17:29,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 121.23076923076923) internal successors, (3152), 26 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states 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 12:17:29,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:17:29,467 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:17:29,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-27 12:17:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-27 12:17:29,673 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:17:29,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:17:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1929579302, now seen corresponding path program 30 times [2023-08-27 12:17:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:17:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491462308] [2023-08-27 12:17:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:17:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:17:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:17:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:17:30,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:17:30,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491462308] [2023-08-27 12:17:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491462308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:17:30,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112221297] [2023-08-27 12:17:30,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 12:17:30,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:17:30,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:17:30,492 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:17:30,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-27 12:17:30,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 12:17:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:17:30,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 12:17:30,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:17:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:17:31,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:17:31,887 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:17:31,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:17:31,906 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:17:31,906 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:17:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:17:32,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112221297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:17:32,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:17:32,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 45 [2023-08-27 12:17:32,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875726774] [2023-08-27 12:17:32,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:17:32,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-27 12:17:32,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:17:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-27 12:17:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2023-08-27 12:17:32,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:17:32,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1683 transitions, 39640 flow. Second operand has 46 states, 46 states have (on average 106.58695652173913) internal successors, (4903), 46 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states 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 12:17:32,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:17:32,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:17:32,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:17:55,248 INFO L124 PetriNetUnfolderBase]: 15051/29488 cut-off events. [2023-08-27 12:17:55,248 INFO L125 PetriNetUnfolderBase]: For 6360614/6360614 co-relation queries the response was YES. [2023-08-27 12:17:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480494 conditions, 29488 events. 15051/29488 cut-off events. For 6360614/6360614 co-relation queries the response was YES. Maximal size of possible extension queue 1265. Compared 279638 event pairs, 3050 based on Foata normal form. 640/30128 useless extension candidates. Maximal degree in co-relation 480311. Up to 18704 conditions per place. [2023-08-27 12:17:55,847 INFO L140 encePairwiseOnDemand]: 362/374 looper letters, 1865 selfloop transitions, 1050 changer transitions 24/2939 dead transitions. [2023-08-27 12:17:55,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 2939 transitions, 79069 flow [2023-08-27 12:17:55,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-27 12:17:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-27 12:17:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 6407 transitions. [2023-08-27 12:17:55,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2953623455651853 [2023-08-27 12:17:55,853 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 6407 transitions. [2023-08-27 12:17:55,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 6407 transitions. [2023-08-27 12:17:55,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:17:55,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 6407 transitions. [2023-08-27 12:17:55,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 110.46551724137932) internal successors, (6407), 58 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states 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 12:17:55,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 374.0) internal successors, (22066), 59 states have internal predecessors, (22066), 0 states have call successors, (0), 0 states 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 12:17:55,868 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 374.0) internal successors, (22066), 59 states have internal predecessors, (22066), 0 states have call successors, (0), 0 states 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 12:17:55,868 INFO L175 Difference]: Start difference. First operand has 531 places, 1683 transitions, 39640 flow. Second operand 58 states and 6407 transitions. [2023-08-27 12:17:55,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 2939 transitions, 79069 flow [2023-08-27 12:18:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2939 transitions, 75297 flow, removed 105 selfloop flow, removed 13 redundant places. [2023-08-27 12:18:27,798 INFO L231 Difference]: Finished difference. Result has 595 places, 2550 transitions, 66511 flow [2023-08-27 12:18:27,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=37841, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=66511, PETRI_PLACES=595, PETRI_TRANSITIONS=2550} [2023-08-27 12:18:27,799 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 566 predicate places. [2023-08-27 12:18:27,799 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 2550 transitions, 66511 flow [2023-08-27 12:18:27,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 106.58695652173913) internal successors, (4903), 46 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states 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 12:18:27,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:18:27,800 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:18:27,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-27 12:18:28,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-27 12:18:28,005 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:18:28,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:18:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -470375542, now seen corresponding path program 31 times [2023-08-27 12:18:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:18:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511098586] [2023-08-27 12:18:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:18:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:18:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:18:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:18:28,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:18:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511098586] [2023-08-27 12:18:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511098586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:18:28,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13465378] [2023-08-27 12:18:28,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 12:18:28,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:18:28,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:18:28,571 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:18:28,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-27 12:18:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:18:28,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 12:18:28,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:18:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:18:29,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:18:29,348 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:18:29,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:18:29,353 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:18:29,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:18:29,387 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:18:29,388 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:18:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:18:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13465378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:18:29,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:18:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-08-27 12:18:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176957105] [2023-08-27 12:18:29,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:18:29,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 12:18:29,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:18:29,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 12:18:29,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 12:18:29,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:18:29,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 2550 transitions, 66511 flow. Second operand has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:18:29,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:18:29,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:18:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:18:54,469 INFO L124 PetriNetUnfolderBase]: 15042/29475 cut-off events. [2023-08-27 12:18:54,469 INFO L125 PetriNetUnfolderBase]: For 6664106/6664106 co-relation queries the response was YES. [2023-08-27 12:18:55,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504081 conditions, 29475 events. 15042/29475 cut-off events. For 6664106/6664106 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 278544 event pairs, 4181 based on Foata normal form. 8/29483 useless extension candidates. Maximal degree in co-relation 503878. Up to 28484 conditions per place. [2023-08-27 12:18:55,576 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 2258 selfloop transitions, 309 changer transitions 3/2570 dead transitions. [2023-08-27 12:18:55,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 2570 transitions, 71890 flow [2023-08-27 12:18:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 12:18:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 12:18:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2180 transitions. [2023-08-27 12:18:55,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2914438502673797 [2023-08-27 12:18:55,578 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2180 transitions. [2023-08-27 12:18:55,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2180 transitions. [2023-08-27 12:18:55,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:18:55,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2180 transitions. [2023-08-27 12:18:55,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 109.0) internal successors, (2180), 20 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states 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 12:18:55,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:18:55,583 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 374.0) internal successors, (7854), 21 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states 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 12:18:55,583 INFO L175 Difference]: Start difference. First operand has 595 places, 2550 transitions, 66511 flow. Second operand 20 states and 2180 transitions. [2023-08-27 12:18:55,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 2570 transitions, 71890 flow [2023-08-27 12:19:33,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 2570 transitions, 69937 flow, removed 820 selfloop flow, removed 16 redundant places. [2023-08-27 12:19:33,282 INFO L231 Difference]: Finished difference. Result has 599 places, 2546 transitions, 65055 flow [2023-08-27 12:19:33,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=64426, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=65055, PETRI_PLACES=599, PETRI_TRANSITIONS=2546} [2023-08-27 12:19:33,283 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 570 predicate places. [2023-08-27 12:19:33,283 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 2546 transitions, 65055 flow [2023-08-27 12:19:33,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:19:33,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:19:33,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:19:33,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-27 12:19:33,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-08-27 12:19:33,485 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:19:33,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:19:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash 389688280, now seen corresponding path program 32 times [2023-08-27 12:19:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:19:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333248082] [2023-08-27 12:19:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:19:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:19:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:19:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:19:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:19:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333248082] [2023-08-27 12:19:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333248082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:19:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828663068] [2023-08-27 12:19:34,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 12:19:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:19:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:19:34,203 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:19:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-27 12:19:34,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 12:19:34,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:19:34,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 12:19:34,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:19:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:19:34,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:19:35,017 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:19:35,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:19:35,022 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:19:35,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:19:35,060 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-27 12:19:35,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-08-27 12:19:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:19:35,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828663068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:19:35,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:19:35,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 44 [2023-08-27 12:19:35,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036226439] [2023-08-27 12:19:35,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:19:35,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 12:19:35,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:19:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 12:19:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 12:19:35,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:19:35,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 2546 transitions, 65055 flow. Second operand has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:19:35,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:19:35,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:19:35,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:20:01,133 INFO L124 PetriNetUnfolderBase]: 15146/29679 cut-off events. [2023-08-27 12:20:01,133 INFO L125 PetriNetUnfolderBase]: For 6783667/6783667 co-relation queries the response was YES. [2023-08-27 12:20:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503109 conditions, 29679 events. 15146/29679 cut-off events. For 6783667/6783667 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 280875 event pairs, 4172 based on Foata normal form. 108/29787 useless extension candidates. Maximal degree in co-relation 502904. Up to 28304 conditions per place. [2023-08-27 12:20:01,773 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 2239 selfloop transitions, 396 changer transitions 11/2646 dead transitions. [2023-08-27 12:20:01,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2646 transitions, 72622 flow [2023-08-27 12:20:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 12:20:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 12:20:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2523 transitions. [2023-08-27 12:20:01,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29330388281794934 [2023-08-27 12:20:01,776 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2523 transitions. [2023-08-27 12:20:01,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2523 transitions. [2023-08-27 12:20:01,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:20:01,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2523 transitions. [2023-08-27 12:20:01,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 109.69565217391305) internal successors, (2523), 23 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states 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 12:20:01,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 374.0) internal successors, (8976), 24 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states 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 12:20:01,782 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 374.0) internal successors, (8976), 24 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states 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 12:20:01,782 INFO L175 Difference]: Start difference. First operand has 599 places, 2546 transitions, 65055 flow. Second operand 23 states and 2523 transitions. [2023-08-27 12:20:01,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2646 transitions, 72622 flow [2023-08-27 12:20:35,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 2646 transitions, 72070 flow, removed 2 selfloop flow, removed 16 redundant places. [2023-08-27 12:20:35,276 INFO L231 Difference]: Finished difference. Result has 605 places, 2567 transitions, 65949 flow [2023-08-27 12:20:35,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=64503, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=65949, PETRI_PLACES=605, PETRI_TRANSITIONS=2567} [2023-08-27 12:20:35,278 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 576 predicate places. [2023-08-27 12:20:35,278 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 2567 transitions, 65949 flow [2023-08-27 12:20:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 106.57777777777778) internal successors, (4796), 45 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states 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 12:20:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:20:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:20:35,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-27 12:20:35,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:20:35,483 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:20:35,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:20:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash -394829570, now seen corresponding path program 33 times [2023-08-27 12:20:35,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:20:35,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894275447] [2023-08-27 12:20:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:20:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:20:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:20:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:20:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:20:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894275447] [2023-08-27 12:20:36,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894275447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:20:36,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415463070] [2023-08-27 12:20:36,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 12:20:36,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:20:36,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:20:36,048 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:20:36,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-27 12:20:36,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 12:20:36,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:20:36,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 12:20:36,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:20:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:20:36,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:20:37,009 INFO L322 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2023-08-27 12:20:37,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2023-08-27 12:20:37,028 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:20:37,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:20:37,034 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-27 12:20:37,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-27 12:20:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:20:37,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415463070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:20:37,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:20:37,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2023-08-27 12:20:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978881507] [2023-08-27 12:20:37,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:20:37,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-27 12:20:37,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:20:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-27 12:20:37,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2023-08-27 12:20:37,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 374 [2023-08-27 12:20:37,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 2567 transitions, 65949 flow. Second operand has 43 states, 43 states have (on average 106.51162790697674) internal successors, (4580), 43 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states 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 12:20:37,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:20:37,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 374 [2023-08-27 12:20:37,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 12:21:03,556 INFO L124 PetriNetUnfolderBase]: 15382/30135 cut-off events. [2023-08-27 12:21:03,556 INFO L125 PetriNetUnfolderBase]: For 7089747/7089747 co-relation queries the response was YES. [2023-08-27 12:21:04,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512467 conditions, 30135 events. 15382/30135 cut-off events. For 7089747/7089747 co-relation queries the response was YES. Maximal size of possible extension queue 1282. Compared 286017 event pairs, 4255 based on Foata normal form. 152/30287 useless extension candidates. Maximal degree in co-relation 512261. Up to 28372 conditions per place. [2023-08-27 12:21:04,571 INFO L140 encePairwiseOnDemand]: 364/374 looper letters, 2318 selfloop transitions, 376 changer transitions 22/2716 dead transitions. [2023-08-27 12:21:04,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 2716 transitions, 74713 flow [2023-08-27 12:21:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 12:21:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 12:21:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2638 transitions. [2023-08-27 12:21:04,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29389483065953653 [2023-08-27 12:21:04,574 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2638 transitions. [2023-08-27 12:21:04,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2638 transitions. [2023-08-27 12:21:04,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 12:21:04,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2638 transitions. [2023-08-27 12:21:04,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 109.91666666666667) internal successors, (2638), 24 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states 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 12:21:04,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 374.0) internal successors, (9350), 25 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states 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 12:21:04,580 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 374.0) internal successors, (9350), 25 states have internal predecessors, (9350), 0 states have call successors, (0), 0 states 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 12:21:04,580 INFO L175 Difference]: Start difference. First operand has 605 places, 2567 transitions, 65949 flow. Second operand 24 states and 2638 transitions. [2023-08-27 12:21:04,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 2716 transitions, 74713 flow [2023-08-27 12:21:42,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 2716 transitions, 73779 flow, removed 115 selfloop flow, removed 19 redundant places. [2023-08-27 12:21:42,827 INFO L231 Difference]: Finished difference. Result has 611 places, 2604 transitions, 66671 flow [2023-08-27 12:21:42,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=374, PETRI_DIFFERENCE_MINUEND_FLOW=65015, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=66671, PETRI_PLACES=611, PETRI_TRANSITIONS=2604} [2023-08-27 12:21:42,828 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 582 predicate places. [2023-08-27 12:21:42,828 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 2604 transitions, 66671 flow [2023-08-27 12:21:42,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 106.51162790697674) internal successors, (4580), 43 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states 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 12:21:42,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 12:21:42,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:21:42,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-27 12:21:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:21:43,034 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 12:21:43,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 12:21:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash 552486392, now seen corresponding path program 34 times [2023-08-27 12:21:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 12:21:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734698126] [2023-08-27 12:21:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 12:21:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 12:21:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 12:21:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:21:43,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 12:21:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734698126] [2023-08-27 12:21:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734698126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 12:21:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187428575] [2023-08-27 12:21:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 12:21:43,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:21:43,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 12:21:43,609 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 12:21:43,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-27 12:21:43,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 12:21:43,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 12:21:43,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 12:21:43,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 12:21:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:21:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 12:21:43,867 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-27 12:21:43,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-27 12:21:43,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 12:21:44,051 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 12:21:44,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 12:21:44,119 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:21:44,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:21:44,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:21:44,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:21:44,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 12:21:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:21:44,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 12:21:47,035 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:47,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-08-27 12:21:47,174 INFO L322 Elim1Store]: treesize reduction 30, result has 62.5 percent of original size [2023-08-27 12:21:47,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104428 treesize of output 96541 [2023-08-27 12:21:47,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:21:47,325 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:21:47,358 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:47,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2996 treesize of output 2859 [2023-08-27 12:21:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:21:47,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:21:47,431 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:47,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2812 treesize of output 2491 [2023-08-27 12:21:47,471 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:21:47,473 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 12:21:47,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:47,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2444 treesize of output 1755 [2023-08-27 12:21:59,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:59,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 49 [2023-08-27 12:21:59,554 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:59,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6262 treesize of output 5826 [2023-08-27 12:21:59,588 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:59,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1446 treesize of output 1295 [2023-08-27 12:21:59,610 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:59,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1286 treesize of output 975 [2023-08-27 12:21:59,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:21:59,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 966 treesize of output 895 [2023-08-27 12:22:00,827 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:22:00,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 49 [2023-08-27 12:22:00,846 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:22:00,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6262 treesize of output 5826 [2023-08-27 12:22:00,898 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:22:00,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1446 treesize of output 1135 [2023-08-27 12:22:00,926 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:22:00,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1126 treesize of output 1055 [2023-08-27 12:22:00,954 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 12:22:00,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1046 treesize of output 895 [2023-08-27 12:22:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 12:22:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187428575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 12:22:01,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 12:22:01,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2023-08-27 12:22:01,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730585882] [2023-08-27 12:22:01,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 12:22:01,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-27 12:22:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 12:22:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-27 12:22:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2055, Unknown=14, NotChecked=0, Total=2352 [2023-08-27 12:22:01,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 374 [2023-08-27 12:22:01,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 2604 transitions, 66671 flow. Second operand has 49 states, 49 states have (on average 96.44897959183673) internal successors, (4726), 49 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states 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 12:22:01,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 12:22:01,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 374 [2023-08-27 12:22:01,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 12:22:33,522 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 12:22:33,522 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 12:22:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-27 12:22:33,574 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (14 of 15 remaining) [2023-08-27 12:22:33,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-08-27 12:22:33,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 12:22:33,780 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 15 remaining) [2023-08-27 12:22:33,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 15 remaining) [2023-08-27 12:22:33,782 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 15 remaining) [2023-08-27 12:22:33,782 INFO L445 BasicCegarLoop]: Path program histogram: [34, 18, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 12:22:33,784 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 12:22:33,784 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 12:22:33,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 12:22:33 BasicIcfg [2023-08-27 12:22:33,786 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 12:22:33,786 INFO L158 Benchmark]: Toolchain (without parser) took 819078.36ms. Allocated memory was 331.4MB in the beginning and 11.0GB in the end (delta: 10.7GB). Free memory was 289.0MB in the beginning and 9.0GB in the end (delta: -8.7GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-27 12:22:33,786 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 331.4MB. Free memory is still 308.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 12:22:33,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.08ms. Allocated memory is still 331.4MB. Free memory was 288.6MB in the beginning and 277.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 12:22:33,786 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.36ms. Allocated memory is still 331.4MB. Free memory was 277.7MB in the beginning and 276.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 12:22:33,786 INFO L158 Benchmark]: Boogie Preprocessor took 25.76ms. Allocated memory is still 331.4MB. Free memory was 276.0MB in the beginning and 274.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 12:22:33,786 INFO L158 Benchmark]: RCFGBuilder took 456.30ms. Allocated memory is still 331.4MB. Free memory was 274.4MB in the beginning and 295.0MB in the end (delta: -20.6MB). Peak memory consumption was 11.4MB. Max. memory is 16.0GB. [2023-08-27 12:22:33,786 INFO L158 Benchmark]: TraceAbstraction took 818316.20ms. Allocated memory was 331.4MB in the beginning and 11.0GB in the end (delta: 10.7GB). Free memory was 294.3MB in the beginning and 9.0GB in the end (delta: -8.7GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-27 12:22:33,787 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 331.4MB. Free memory is still 308.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 234.08ms. Allocated memory is still 331.4MB. Free memory was 288.6MB in the beginning and 277.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.36ms. Allocated memory is still 331.4MB. Free memory was 277.7MB in the beginning and 276.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.76ms. Allocated memory is still 331.4MB. Free memory was 276.0MB in the beginning and 274.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 456.30ms. Allocated memory is still 331.4MB. Free memory was 274.4MB in the beginning and 295.0MB in the end (delta: -20.6MB). Peak memory consumption was 11.4MB. Max. memory is 16.0GB. * TraceAbstraction took 818316.20ms. Allocated memory was 331.4MB in the beginning and 11.0GB in the end (delta: 10.7GB). Free memory was 294.3MB in the beginning and 9.0GB in the end (delta: -8.7GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 163 PlacesBefore, 29 PlacesAfterwards, 171 TransitionsBefore, 27 TransitionsAfterwards, 1400 CoEnabledTransitionPairs, 7 FixpointIterations, 112 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 9 ConcurrentYvCompositions, 10 ChoiceCompositions, 192 TotalNumberOfCompositions, 2014 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1602, independent: 1543, independent conditional: 0, independent unconditional: 1543, dependent: 59, dependent conditional: 0, dependent unconditional: 59, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 829, independent: 815, independent conditional: 0, independent unconditional: 815, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1602, independent: 728, independent conditional: 0, independent unconditional: 728, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 829, unknown conditional: 0, unknown unconditional: 829] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 95/374 universal loopers) in iteration 81,while PetriNetUnfolder was constructing finite prefix that currently has 133670 conditions, 8073 events (4490/8072 cut-off events. For 1830322/1830322 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 67406 event pairs, 676 based on Foata normal form. 102/9353 useless extension candidates. Maximal degree in co-relation 133462. Up to 3974 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 206 locations, 15 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: 818.2s, OverallIterations: 81, TraceHistogramMax: 10, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 650.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 346 mSolverCounterUnknown, 8394 SdHoareTripleChecker+Valid, 51.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8394 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 47.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 560 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 927 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53910 IncrementalHoareTripleChecker+Invalid, 55743 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 927 mSolverCounterUnsat, 0 mSDtfsCounter, 53910 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4327 GetRequests, 1804 SyntacticMatches, 64 SemanticMatches, 2459 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 25048 ImplicationChecksByTransitivity, 124.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66671occurred in iteration=80, InterpolantAutomatonStates: 1294, 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: 0.9s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 135.2s InterpolantComputationTime, 3042 NumberOfCodeBlocks, 3018 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 4262 ConstructedInterpolants, 208 QuantifiedInterpolants, 63210 SizeOfPredicates, 738 NumberOfNonLiveVariables, 16831 ConjunctsInSsa, 1910 ConjunctsInUnsatCore, 219 InterpolantComputations, 17 PerfectInterpolantSequences, 1273/2771 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